File Format Specifications [v2.86]

Last Modified 03/18/11
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  • This document describes the file formats used to store aerosol data at ESRL/GMD. There are three basic types of files: ambient aerosol, ambient meteorology, and sampling system state.
  • All data files are plain ASCII text, in comma-separated, fixed-length fields. The end of a record is denoted by a linefeed character (ASCII hex 10), which optionally may be preceded by a carriage return.
  • Universal Coordinated Time (UTC) is used for all time fields. For averaged data, the time reported is the start of the averaging interval.
  • Basic aerosol data file record format: (stations with minimal instrumentation may truncate the records at the point where no additional data are available). Leading plus signs are replaced with a blank. This is the common format for the basic measurements obtained at a high time resolution. Missing value codes are always positive. For stations where a particular instrument is not present, the corresponding data field may be either empty or contain the missing value code for that parameter.
  • Separate data and header files are used for each type of data. The data fields for ambient data are identical for all stations (although truncated records may be used for stations with limited instrumentation), while different data fields may be used in the sampling system state files from the various stations. There may even be several different types of sampling system state files for some sites.
  • A flags field is used in ambient aerosol data files to indicate sampling conditions and data processing status.
  • Aerosol light scattering and light absorption coefficients are reported relative to a particular temperature and pressure, either ambient or standard temperature (273.15K) and pressure. An STP correction bit in the flags field is used to denote which reference case is used.


Naming Convention

File names consist of content, status, time codes, and station identifiers. The general format is:

<FC><s><timecode>.<STN>

<FC> is a two character (with the exception of "volumes") File Code that indicates the general content.


File-Code General content
a_ aerosol data (Old CP format)
ad_ & fd_ aerosol and filter digital data (ad_ is Old CP format)
af _& ff_ aerosol filter data (af_ is old CP format)
ageS Averaged data segments
ag_ aerosol and GPS merged data
al_ averaged data, extracted using xt2
am_ aerosol monitor data
at_ aethelometer data -- old format
b__ UPS data
bm_ UPS monitor records
ca_ One minute averaged CN data
cm_ CN monitor data
da_ One minute averaged CCN data
ds_ The results of running a model to calculate the supersaturation of a given average
fm_ filter monitor records
f"w" fitted f(RH) info for specific wavelength"w" (e.g., fr, fb or fg)
ft_ Filter sample time records
g__ GPS data
h_ "humidograph" data; A merging of several instruments at a one minute averaging frequency
hge 1 sec edited IAP data with GPS merged in
hgeS segment averaged IAP data with GPS merged in
hm_ Humidograph set point channel changes
k_ aethalometer data
la_ one minute averaged data for the CLAP or PSAP
laeS segment averaged lae data file with GPS data merged in
lm_ CLAP monitor records
lw_ 3-wavelength PSAP data
m__ general monitor info
me_ ambient meteorological data; not produced by CPD; primarily exist with Older CP formated data
na_ One minute averages of Nephelometer data
nb_ zero-corrected na_ data file
nbN_eS segment averaged naNe data file with GPS data merged in (see nb_ file type)
nc_ neph calibration results
ne_ neph state errors
nk_ neph span check report
nm_ neph monitor data
ns_ neph state data
nz_ na_ zero data file
oa, oc, oe, om, wet neph filenames else the same as the na,nc, ...
p__ Present Weather Detector
pm_ LovePID data
si__ processed OPC data
sm_ output from scheduled tasks
sr_ raw OPC data
ss_ seconds and samples per sample period
ud_ umac digital state changes
ua_& um_ umac monitor records
vol & volumes Weekly cumulative filter volume records
w__ Wind Speed and Wind Direction file
wm_ Watlow monitor data
wx_ Weather Data
a_[AHMD] Averaged data
la_[AHMD] Averaged data (la_ file format)
<s> is a one or two character Status Code indicating the processing state of the file
Status-Code Data form
_ as high-resolution (usually minute) data
b,g,r blue,green or red wavelength for f(RH) data
e high resolution, edited data
eS edited data for time segments.
h, H as hourly averages
d, D as daily averages
m, M as monthly averages
A "generic" average-formatted file
t as 2-hour averages
w as weekly averages
<timecode> is a string indicating time interval of contents
Timecode Data Time Interval
X the most recently processed data (usually one day)
cum "cumulative", variable interval
Head no time interval - this is a header file
<yr>w<wk> one week of year <yr> beginning with week <wk>
<yr>Q<q> one quarter of year <yr> beginning with quarter <q>
<yr> year <yr>
<yr>d<doy> one day of year <yr> beginning with DOY <doy>
<yr>m<mn> one month of year <yr> beginning with month <mn>
YYYY_DDD_X Data from year YYYY, day of year DDD, sequential label X varies from A-Z to allow multiple files per day.

<STN> is the three character station identifier (source of the data).
Station ID Station location
air Aircraft Field Campaigns
alt Alert, Canada
amf Arm Mobile Facility
bnd Bondville, IL
bld Boulder, CO
brw Barrow, AK
cpo Cheeka Peak, WA
cpt Cape Point, South Africa
csj Cape San Juan, Puerto Rico
cvi Counterflow Virtual Impactor
iap In-situ Aircraft Profiles
kco Kaashidoo, Maldives
kos Kosan, Cheju, South Korea
kpo Kpuszta, Hungary
lab Lab, Boulder, CO
lar Laramie, WY
mln Mauna Loa, HI [New]
mlo Mauna Loa, HI
nsa North Slope (Barrow), AK
nwr Niwot Ridge, CO
p-3 p-3 flight
sfa Surface Field Campaigns A
sfb Surface Field Campaigns B
sfc Surface Field Campaigns
sgp So. Great Plains
smo American Samoa
spo South Pole
thd Trinidad Head, CA
wlg Mt. Waliguan, China
wsa Sable Island, Canada
Field Separator All files currently have a comma as the field separator.
Field definition Each File Code, Status Code combination has a specific format, as described below:
File: a__<timecode>.<STN>
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Col # Name Format and Missing Value Code (mvc) Description Scanf info.
1 Station_ID STN WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC DOY 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Flags 0011 4-character code representing system status. %4s
5 CN_control ±9.999e-99 Aerosol number concentration (cm-3) measured with CNC on "control" inlet %10.3e
6 CN_ambient ±9.999e-99 Aerosol number concentration (cm-3) measured with CNC on "ambient" inlet %10.3e
7 Bap_G ±9.999e-99 Aerosol light absorption coefficient (m-1), green channel. %10.3e
8 RefBsp_B ±9.999e-99 Aerosol total light scattering coefficient (m-1), blue channel. %10.3e
9 RefBsp_G ±9.999e-99 Aerosol total light scattering coefficient (m-1), green channel. %10.3e
10 RefBsp_R ±9.999e-99 Aerosol total light scattering coefficient (m-1), red channel. %10.3e
11 RefBbsp_B
-or-
Bsp_NIR
±9.999e-99 Aerosol backwards-hemispheric light scattering coefficient (m-1), blue channel. For stations equipped with 4-wavelength nephelometers, this field is aerosol total light scattering coefficient (m-1), near infrared channel. %10.3e
12 RefBbsp_G ±9.999e-99 Aerosol backwards-hemispheric light scattering coefficient (m-1), green channel. %10.3e
13 RefBbsp_R ±9.999e-99 Aerosol backwards-hemispheric light scattering coefficient (m-1), red channel. %10.3e
14 RH_refNeph ±999 Relative Humidity (percent) inside nephelometer %4d
15 T_refNeph ±999.9 Temperature (K) inside nephelometer %5.1f
16 P_refNeph ±9999.9 Pressure (hPa) inside nephelometer %7.1f
17 WS ±99.9 Local wind speed (m s-1) %5.1f
18 WD ±999 Local wind direction (degrees True) %4d

File: ad_<timecode>.<STN>, fd_<timecode>.<STN>
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Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 Time_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Flags 0011 4-character code representing system status. %4s
5 Analyzers_ON 0 1=analyzers ON, 0 = analyzers OFF %1d
6 Active_Filter 9 Valid filters are 1-8. If more than one filter is active at any one time, or if no filters are active, this field is set to zero. %1d
7 Filter_Error 999 0=no filter error Otherwise, this field contains the decimal value of a byte composed of the status of each filter. Each filter is a bit (1=filter on, 0=filter off), and are organized such that position 0 (LSB) = filter 1, position 1 = filter 2, up to position 7 respectively. %03d
8 Unused1 0 unused digital input %1d
9 Unused2 0 unused digital input %1d
10 Unused3 0 unused digital input %1d
11 Unused4 0 unused digital input %1d

File: af_<timecode>.<STN>, ff_<timecode>.<STN>
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Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Empty String Exists due to historical formatting %s
5 Filter Exists due to historical formatting %s
6 Text Exists due to historical formatting %s
7 vol0_blank volume of air/gas through the blank
8 vol1 total volume of air/gas through filter1
9 vol2 total volume of air/gas through filter2
10 vol3 total volume of air/gas through filter3
11 vol4 total volume of air/gas through filter4
12 vol5 total volume of air/gas through filter5
13 vol6 total volume of air/gas through filter6
14 vol7 total volume of air/gas through filter7
15 vol8_bypass total volume of air/gas through the bypass line

File: ageS<timecode>.<STN> Averaged data segments.
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Col # Name Format and Missing Value Code (mvc) Description Scanf info.
1-24 same as ag_ file
25 Segment ID required field Unique identifier for segment, YYYY_DDD_X_SITE_SEG, where YYYY=year, DDD=day of year, X=sequence label A..Z, SITE=location label, SEG=segment label %s

File: ag_<timecode>.<STN>
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Col # Name Format and Missing Value Code (mvc) Description Scanf info.
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Flags 0011 4-character code representing system status. %4s
5 CN_control ±9.999e-99 Aerosol number concentration (cm-3) measured with CNC on "control" inlet %010.3e
6 CN_ambient ±9.999e-99 Aerosol number concentration (cm-3) measured with CNC on "ambient" inlet %010.3e
7 Bap_G ±9.999e-99 Aerosol light absorption coefficient (m-1), green channel. %010.3e
8 Bsp_B ±9.999e-99 Aerosol total light scattering coefficient (m-1), blue channel. %010.3e
9 Bsp_G ±9.999e-99 Aerosol total light scattering coefficient (m-1), green channel. %010.3e
10 Bsp_R ±9.999e-99 Aerosol total light scattering coefficient (m-1), red channel. %010.3e
11 Bbsp_B
-or-
Bsp_NIR
±9.999e-99 Aerosol backwards-hemispheric light scattering coefficient (m-1), blue channel. For stations equipped with 4-wavelength nephelometers, this field is aerosol total light scattering coefficient (m-1), near infrared channel. %010.3e
12 Bbsp_G ±9.999e-99 Aerosol backwards-hemispheric light scattering coefficient (m-1), green channel. %010.3e
13 Bbsp_R ±9.999e-99 Aerosol backwards-hemispheric light scattering coefficient (m-1), red channel. %010.3e
14 Neph_RH ±999 Relative Humidity (percent) inside nephelometer %04d
15 Neph_T ±999.9 Temperature (K) inside nephelometer %05.1f
16 Neph_P ±9999.9 Pressure (hPa) inside nephelometer %07.1f
17 Ambient_T ±99.9 Ambient temperature (K) %05.1f
18 Ambient_RH ±999 Ambient RH (%) %04d
19 GPS_time_UTC 099.99999 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
20 Latitude 999.9999 Latitude, positive numbers are North %08.4f
21 Longitude 9999.9999 Longitude, positive numbers are West %09.4f
22 Altitude_m 9999.9 Altitude above mean sea level, meters %06.1f
23 GndSpeed_m_s 999.9 Speed over ground, m/s %05.1f
24 Course_true 999.9 True course over ground, degrees %05.1f

File: al_[HMD]X.<STN> average format generated using xt2
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Col # Name Format and Missing Value Code (mvc) Description Scanf info
1-58 Same as a_[AHMD] Same as a_[AHMD] Same as a_[AHMD] Same as a_[AHMD]
59 Bap_B (default size) ±9.999e-99 Aerosol light absorption coefficient (m-1), blue channel. (467 nm) %10.3e
60 Bap_G (default size) ±9.999e-99 Aerosol light absorption coefficient (m-1), green channel. (530 nm) %10.3e
61 Bap_R (default size) ±9.999e-99 Aerosol light absorption coefficient (m-1), red channel. (660 nm) %10.3e
62 Bap_B (alternate size) ±9.999e-99 Aerosol light absorption coefficient (m-1), blue channel. (467 nm) %10.3e
63 Bap_G (alternate size) ±9.999e-99 Aerosol light absorption coefficient (m-1), green channel. (530 nm) %10.3e
64 Bap_R (alternate size) ±9.999e-99 Aerosol light absorption coefficient (m-1), red channel. (660 nm) %10.3e
65 SD_Bap_B (default size) ±9.999e-99 Standard deviation of Bap_B data this period %10.3e
66 SD_Bap_G (default size) ±9.999e-99 Standard deviation of Bap_G data this period %10.3e
67 SD_Bap_R (default size) ±9.999e-99 Standard deviation of Bap_R data this period %10.3e
68 SD_Bap_B (alternate size) ±9.999e-99 Standard deviation of Bap_B data this period %10.3e
69 SD_Bap_G (alternate size) ±9.999e-99 Standard deviation of Bap_G data this period %10.3e
70 SD_Bap_R (alternate size) ±9.999e-99 Standard deviation of Bap_R data this period %10.3e
71 N_Bap_B (default size) ±99999 Number of data points used in computation %6d
72 N_Bap_G (default size) ±99999 Number of data points used in computation %6d
73 N_Bap_R (default size) ±99999 Number of data points used in computation %6d
74 N_Bap_B (alternate size) ±99999 Number of data points used in computation %6d
75 N_Bap_G (alternate size) ±99999 Number of data points used in computation %6d
76 N_Bap_R (alternate size) ±99999 Number of data points used in computation %6d
File: am_<timecode>.<STN>
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Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Q_filter_lpm ±99.99 Instantaneous air quantity through active filter (lpm) %06.2f
5 Q_analyzer_lpm ±99.99 Instantaneous air quantity through analyzer (lpm) %06.2f
6 Q_3_lpm ±99.99 Instantaneous air quantity through spare line %06.2f
7 Q_4_lpm ±99.99 Instantaneous air quantity through spare line %06.2f
8 Q_bypass_lpm ±99.99 Instantaneous air quantity through bypass line. %06.2f
9 Q_CNdrier_lpm ±99.99 Instantaneous air quantity through CN drier line. %06.2f
10 Q_CN_lpm ±99.99 Instantaneous air quantity through CN. %06.2f
11 T_sample_degC ±99.9 Temperature of current air sample. (deg C) %05.1f
12 T_stack_degC ±99.9 Temperature of air through stack. (deg C) %05.1f
13 T_pumpbox_degC ±99.9 Temperature inside pumpbox. (deg C) %05.1f
14 T_heater_deg C ±99.9 Temperature of heating tape. (deg C) %05.1f
15 T_uMAC_degC ±99.9 Temperature measured at mMAC panel. (deg C) %05.1f
16 dP_Pitot_hPa ±9.999 DPressure across stack. (hPa) %06.3f
17 dP_Purge_hPa ±999.9 DPressure across purge line. (hPa) %06.1f
18 dP_F1_hPa ±999.9 DPressure across filter 1. (hPa) %06.1f
19 dP_F2_hPa ±999.9 DPressure across filter 2. (hPa) %06.1f
20 dP_F3_hPa ±999.9 DPressure across filter 3. (hPa) %06.1f
21 dP_F4_hPa ±999.9 DPressure across filter 4. (hPa) %06.1f
22 dP_F5_hPa ±999.9 DPressure across filter 5. (hPa) %06.1f
23 dP_F6_hPa ±999.9 DPressure across filter 6. (hPa) %06.1f
24 dP_F7_hPa ±999.9 DPressure across filter 7. (hPa) %06.1f
25 dP_F8_hPa ±999.9 DPressure across filter 8. (hPa) %06.1f
26 V_uMAC_V ±9.999 Line voltage supplying power to mMAC. (volts) %06.3f
27 RH_sample ±999.9 Relative humidity of sample %06.1f
28 dP_neph_im_hPa ±999.9 DPressure across neph impactor valve (hPa) %06.1f
29 dP_spare1 ±999.9 DPressure spare1 (hPa) %06.1f
30 dP_spare2 ±999.9 DPressure spare2 (hPa) %06.1f
31 T_rack ±99.9 Temperature inside the rack. (deg C) %05.1f
32 P_station ±09999.9 station pressure (hPa) %07.1f
File: at_<timecode>.<STN>
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Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 date
5 time
6..12 concentration 999999 BC concentration (ng/m3) [7 wavelength channels] %07d
13 flow ±9.99 aethalometer flow rate %05.2f
14 sz_1 99.9999 sample zero [7 wavelength channels] %07d
15 sb_1 99.9999 sample zero [7 wavelength channels] %07d
16 rz_1 99.9999 reference zero [7 wavelength channels] %07d
17 rb_1 99.9999 reference beam [7 wavelength channels] %07d
18 fraction_1 9.99 fraction of dilution %05.3f
19 attenuation_1
20..55 sz_2 repeat columns 14-19 for other 6 wavelength channels
File: b__<timecode>.<STN>
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Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 AC_Volts_In ±999 AC Voltage supplying UPS %04d
5 AC_Volts_Out ±999 AC Voltage UPS is supplying as output %04d
6 AC_Amps_Out ±999.9 AC Amps UPS is currently supplying %06.1f
7 Batt_DC_amp ±999.9 DC Amps of UPS Battery %06.1f
8 Batt_DC_V ±999.9 DC Voltage of UPS Battery %06.1f
9 Frequency ±999.9 Frequency of line supplying UPS power (Hz) %06.1f
10 UPS_Temp ±999 Temperature inside UPS (deg C) %04d

File: bm_<timecode>.<STN>
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Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 B_Monitor Last_UPS_ Report (string of variable length) String containing an event report generated by the UPS program. This string may contain embedded spaces. %s
File: ca_<timecode>.<STN>
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Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Flags
5 Ncnc
File: cm_<timecode>.<STN>
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Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 CNC_chan1_sec
5 CNC_chan1_min
6 Status
7 T_condenser
8 T_saturator
9 Q_ccs

File: da_<timecode>.<STN>
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Col # Name Formatand Missing Value Code(mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 FRACTIONAL_DOY (January 1 = 1) %09.5f
4 ss_set 99.999 Sample supersaturation (percent), setpoint value reported by instrument %06.3f
5 Temp_Unstable_flag 0 Hexadecimal flag, non-zero values indicate that instrument was not operating stably. Bit 0 (0x00) is set by instrument, based on the temperature difference between the setpoint temperature and the actual temperature. Bit 1 (0x02) is set by cpd, based on the standard deviation of the column temperature difference exceeding a threshold. %01X
6 T_TEC1 999.99 Temperature (deg C) at top of column %06.2f
7 T_TEC2 999.99 Temperature (deg C) at middle of column %06.2f
8 T_TEC3 999.99 Temperature (deg C) bottom of column %06.2f
9 T_sample 999.99 Temperature (deg C) of sample air entering the column %06.2f
10 T_inlet 999.99 Temperature of sample air at entrance to instrument %06.2f
11 T_OPC 999.99 Temperature of the optical particle counter %06.2f
12 T_nafion 999.99 Temperature of the nafion humidifier %06.2f
13 dT_TEC3_TEC1_StdDev 99.99 Standard deviation of the temperature difference (deg C) between the top and bottom of the column %05.2f
14 Q_sample 999.99 Volumetric flowrate (ccm) of sample air %06.2f
15 Q_sheath 999.99 Volumetric flowrate (ccm) of sheath air %06.2f
16 P_sample 9999.99 Sample pressure (hPa) %07.2f
17 Laser_Current 9999.99 OPC laser current (mA) %07.2f
18 N_ccn 99999.99 Number concentration of CCN (cm-3) %08.2f
19 Bin_Number_N_ccn 99 Bin number of lowest channel of OPC included in summation of N_ccn %02d
20..40 dN_1 - dN 21 99999.9 number concentration in each OPC size bin %07.1f

File: ds_<timecode>.<STN>
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Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Q_Total_m3s 9.999e-99 Q_sample + Q_sheath (from da_) %9.3e
5 Q_sh_aer_m3s 999.99 Q_sheath/Q_sample (from da_) %06.2f
6 Press_pa 9.999e-99 P_sample (from da_) %9.3e
7 T_inlet_K 999.99 T_inlet (from da_) %06.2f
8 T_cold_K 999.99 T_TEC1 (from da_) %06.2f
9 T_Hot_K 999.99 T_TEC3 (from da_) %06.2f
10 N_ccn 99999.99 N_ccn (from da_) %08.2f
11 dT_TEC3_TEC1 _stdDev 99.99 from da_ %05.2f
12 SS_calc 999.99 sample supersaturation (percent), from model calculation %06.3f
File: fd_ <timecode>.<STN>
Return to File-Code see ad_
File: ff_<timecode>.<STN>
Return to File-Code see af_
File: fm_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Q_filter_lpm ±99.99 Instantaneous air quantity through active filter (lpm) %06.2f
5 T_sample_degC ±99.9 Temperature of current air sample. (deg C) %05.1f
6 RH_sample ±999.9 Relative humidity of sample %06.1f
7 dP_Pump_hPa ±999.9 DPressure across filter pump. (hPa) %06.1f
8 dP_F1_hPa ±999.9 DPressure across filter 1. (hPa) %06.1f
9 dP_F2_hPa ±999.9 DPressure across filter 2. (hPa) %06.1f
10 dP_F3_hPa ±999.9 DPressure across filter 3. (hPa) %06.1f
11 dP_F4_hPa ±999.9 DPressure across filter 4. (hPa) %06.1f
12 dP_F5_hPa ±999.9 DPressure across filter 5. (hPa) %06.1f
13 dP_F6_hPa ±999.9 DPressure across filter 6. (hPa) %06.1f
14 dP_F7_hPa ±999.9 DPressure across filter 7. (hPa) %06.1f
15 dP_F8_hPa ±999.9 DPressure across filter 8. (hPa) %06.1f
16 dP_spare1 ±999.9 DPressure spare1 (hPa) %06.1f
17 dP_spare2 ±999.9 DPressure spare2 (hPa) %06.1f
18 dP_spare3 ±999.9 DPressure spare3 (hPa) %06.1f
19 T_rack_degC ±99.9 Temperature inside the rack. (deg C) %05.1f
20 T_uMAC_degC ±99.9 Temperature measured at uMAC panel in filter rack. (deg C) %05.1f
21 V_uMAC_V ±9.999 Line voltage supplying power to uMAC in filter rack. (volts) %06.3f
22 CurrSampleID ±9 Number of current filter sample (1-8) %1d

File: f "w" fb(or fg or fr)<HX>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 flags 0010 4-character code representing system status %4s
5 f(RH) for 3 parameter fit 99.999 fitted value of f(RH) for 85/40 (3p fit) %6.3f
6 chi^2 3 param fit 9.999e-99 goodness of fit parameter %10.3e
7 min bsp 9.999e-99 minimum light scattering coefficient for file wavelength (m-1), reported at STP %10.3e
8 min dry RH 999.9 minimum dry relative humidity (%) used in curve fit %5.1
9 max dry RH 999.9 maximum dry relative humidity (%) used in curve fit %5.1
10 min wet RH 999.9 minimum wet relative humidity (%) used in curve fit %5.1
11 max wet RH 999.9 maximum wet relative humidity (%) used in curve fit %5.1
12 p1 9.999e-99 3 param curvefit parameter #1 %10.3e
13 p2 9.999e-99 3 param curvefit parameter #2 %10.3e
14 p3 9.999e-99 3 param curvefit parameter #3 %10.3e
15 f(RH) for 2 parameter fit 99.999 fitted value of f(RH) for 85/40 (2p fit) %6.3f
16 chi^2 2 param fit 9.999e-99 goodness of fit parameter %10.3e
17 p1 9.999e-99 2 param curvefit parameter #1 %10.3e
18 p2 9.999e-99 2 param curvefit parameter #2 %10.3e
19 f(RH) 99.999 fitted value of f(RH) for 85/40 for bbsp %6.3f
20 chi^2 2 param fitfo bbsp 9.999e-99 goodness of fit parameter %10.3e
21 p1 9.999e-99 2 param curvefit parameter #1 for bbsp %10.3e
22 p2 9.999e-99 2 param curvefit parameter #2 for bbsp %10.3e


File: ft_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 EndYear 1993 End Year of sample period %4d
3 EndTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) Endtime of sample period %09.5f
4 StartYear 1993 Start Year of sample period %4d
5 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY StartTime of sample period %09.5f
6 Cum_sec 999999 Seconds elapsed during sampling period. %6d
7 Filter 9 Filter that is being sampled this period %1d
File: g__<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info.
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 GPS_time_UTC 099.99999 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
5 Latitude 999.9999 Latitude, positive numbers are North %08.4f
6 Longitude 9999.9999 Longitude, positive numbers are West %09.4f
7 Altitude_m 9999.9 Altitude above mean sea level, meters %06.1f
8 GndSpeed_m_s 999.9 Speed over ground, m/s %05.1f
9 Course_true 999.9 True course over ground, degrees %05.1f

File: h__<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID SGP 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Flags 0011 4-character code representing system status %4s
5 CN_control 99999.9 Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "control" inlet. %07.1f
6 CN_ambient 99999.9 Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "ambient" inlet. %07.1f
7 Bap_G 9999.99 Aerosol light absorption coefficient (Mm-1), green (adj. to 550 nm) channel. %07.2f
8 RefBsp_B 9999.99 Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Blue channel %07.2f
9 RefBsp_G 9999.99 Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Green channel %07.2f
10 RefBsp_R 9999.99 Aerosol total light scattering coefficient (Mm-1), Ref. Neph. red channel %07.2f
11 RefBbsp_B 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Ref. Neph blue channel %07.2f
12 RefBbsp_G 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Ref. Neph. green channel %07.2f
13 RefBbsp_R 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Ref. Neph. red channel %07.2f
14 WetBsp_B 9999.99 Aerosol total light scattering coefficient (Mm-1), Hum. Neph. Blue channel %07.2f
15 WetBsp_G 9999.99 Aerosol total light scattering coefficient (Mm-1), Hum. Neph. Green channel %07.2f
16 WetBsp_R 9999.99 Aerosol total light scattering coefficient (Mm-1), Hum. Neph. red channel %07.2f
17 WetBbsp_B 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Hum. Neph blue channel %07.2f
18 WetBbsp_G 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Hum. Neph. green channel %07.2f
19 WetBbsp_R 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Hum. Neph. red channel %07.2f
20 RH_Inlet 999.9 Relative humidity (percent) at inlet %05.1f
21 T_Inlet 999.9 Temperature (deg C) at inlet. %05.1f
22 RH_refInlet 999.9 Relative humidity (percent) at ref. nephelometer inlet %05.1f
23 T_refInlet 999.9 Temperature (deg C) at ref. nephelometer inlet. %05.1f
24 RH_refNeph 999.9 Relative humidity (percent) inside ref. nephelometer. %05.1f
25 T_refNeph 999.9 Temperature (deg C) inside ref. nephelometer. %05.1f
26 RH_S1 999.9 Relative humidity (percent) of humido. preheater. %05.1f
27 T_S1 999.9 Temperature (deg C) of humido. preheater. %05.1f
28 RH_S2 999.9 Relative humidity (percent) of humido. controller. %05.1f
29 T_S2 999.9 Temperature (deg C) of humido. controller. %05.1f
30 RH_wetInlet 999.9 Relative humidity (percent) at wet nephelometer inlet. %05.1f
31 T_wetInlet 999.9 Temperature (deg C) at wet nephelometer inlet. %05.1f
32 RH_wetNeph 999.9 Relative humidity (percent) inside of wet nephelometer. %05.1f
33 T_wetNeph 999.9 Temperature (deg C) inside of wet nephelometer. %05.1f
34 RH_Ambient 999.9 Relative humidity (percent) in ambient air %05.1f
35 T_Ambient 999.9 Temperature (deg C) in ambient air %05.1f
36 P_ambient 9999.9 Ambient pressure (hPa) %06.1f
37 P_refNeph 9999.9 Pressure inside reference nephelometer (hPa) %06.1f
38 P_wetNeph 9999.9 Pressure inside wet nephelometer (hPa) %06.1f
39 W_S 99.9 Wind speed (m/s) %04.1f
40 W_D 999 Wind direction (deg true) %03d
41 Bap_B_3W 9999.99 Aerosol light absorption coefficient (Mm-1), blue (PSAP=467 nm) channel. %07.2f
42 Bap_G_3W 9999.99 Aerosol light absorption coefficient (Mm-1), green (PSAP=530 nm) channel. %07.2f
43 Bap_R_3W 9999.99 Aerosol light absorption coefficient (Mm-1), red (PSAP=660 nm) channel. %07.2f

File: hge<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID IAP 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Flags 0011 4-character code representing system status %4s
5 CN_control 99999.9 Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "control" inlet. %07.1f
6 CN_ambient 99999.9 Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "ambient" inlet. %07.1f
7 Bap_G 9999.99 Aerosol light absorption coefficient (Mm-1), green (adj to 550 nm) channel. %07.2f
8 RefBsp_B 9999.99 Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Blue channel %07.2f
9 RefBsp_G 9999.99 Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Green channel %07.2f
10 RefBsp_R 9999.99 Aerosol total light scattering coefficient (Mm-1), Ref. Neph. red channel %07.2f
11 RefBbsp_B 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Ref. Neph blue channel %07.2f
12 RefBbsp_G 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Ref. Neph. green channel %07.2f
13 RefBbsp_R 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Ref. Neph. red channel %07.2f
14 WetBsp_B 9999.99 Aerosol total light scattering coefficient (Mm-1), Hum. Neph. Blue channel %07.2f
15 WetBsp_G 9999.99 Aerosol total light scattering coefficient (Mm-1), Hum. Neph. Green channel %07.2f
16 WetBsp_R 9999.99 Aerosol total light scattering coefficient (Mm-1), Hum. Neph. red channel %07.2f
17 WetBbsp_B 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Hum. Neph blue channel %07.2f
18 WetBbsp_G 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Hum. Neph. green channel %07.2f
19 WetBbsp_R 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Hum. Neph. red channel %07.2f
20 RH_Inlet 999.9 Relative humidity (percent) at inlet %05.1f
21 T_Inlet 999.9 Temperature (deg C) at inlet. %05.1f
22 RH_refInlet 999.9 Relative humidity (percent) at ref. nephelometer inlet %05.1f
23 T_refInlet 999.9 Temperature (deg C) at ref. nephelometer inlet. %05.1f
24 RH_refNeph 999.9 Relative humidity (percent) inside ref. nephelometer. %05.1f
25 T_refNeph 999.9 Temperature (deg C) inside ref. nephelometer. %05.1f
26 RH_S1 999.9 Relative humidity (percent) of humido. preheater. %05.1f
27 T_S1 999.9 Temperature (deg C) of humido. preheater. %05.1f
28 RH_S2 999.9 Relative humidity (percent) of humido. controller. %05.1f
29 T_S2 999.9 Temperature (deg C) of humido. controller. %05.1f
30 RH_wetInlet 999.9 Relative humidity (percent) at wet nephelometer inlet. %05.1f
31 T_wetInlet 999.9 Temperature (deg C) at wet nephelometer inlet. %05.1f
32 RH_wetNeph 999.9 Relative humidity (percent) inside of wet nephelometer. %05.1f
33 T_wetNeph 999.9 Temperature (deg C) inside of wet nephelometer. %05.1f
34 RH_Ambient 999.9 Relative humidity (percent) in ambient air %05.1f
35 T_Ambient 999.9 Temperature (deg C) in ambient air %05.1f
36 P_ambient 9999.9 Ambient pressure (hPa) %06.1f
37 P_refNeph 9999.9 Pressure inside reference nephelometer (hPa) %06.1f
38 P_wetNeph 9999.9 Pressure inside wet nephelometer (hPa) %06.1f
39 W_S 99.9 Wind speed (m/s) %04.1f
40 W_D 999 Wind direction (deg true) %03d
41 GPS_time_UTC 999.99999 GPS time. %09.5f
42 Latitude, positive numbers are North 999.9999 Latitude %08.4f
43 Longitude 9999.9999 Longitude, positive numbers are West %09.4f
44 Altitude_m 9999.9 Altitude (m asl) %06.1f
45 Gnd_Speed_m_s 999.9 Speed over ground (m/s) %05.1f
46 Course_true 999.9 True course over ground (degrees) %05.1f

File: hgeS<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1-46 Same as hge same as hge Same as hge same as hge
47 Flight_Seg_Id required field Unique identifier for segment, YYYY_DDD_X_SITE_SEG, where YYYY=year, DDD=day of year, X=sequence label A..Z, SITE=location label, SEG=segment label (100s feet) %s

File: hm_<timecode>.<STN>
Return to File-Code

Setpoint channel values. Written on a setpoint change (may be scheduled or the result of operator intervention). The humidigraph system is essentially a heater and a water pump. So a setpoint channel will change when the heater goes to the next temperature, or the water pump is primed (for example). The steps are configured in the ini file that a certain number of seconds per hour the temperature are set to a particular value.

Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Chan_A
5 Chan_B
7 Chan_C
8 Chan_D
File: k__<timecode>.<STN>; raw aethalometer data
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 flow_slpm ±9.99 aethalometer flow rate %05.2f
5 fraction 9.99 fraction of dilution %05.3f
6..12 concentration 999999 BC concentration (ng/m3) [7 wavelength channels] %07d
13..19 atn 999.999 attenuation [7 wavelength channels] %07d
20..26 sz 99.9999 sample zero [7 wavelength channels] %07d
27..33 sb 99.9999 sample beam [7 wavelength channels] %07d
34..40 rz 99.9999 reference zero [7 wavelength channels] %07d
41..47 rb 99.9999 reference beam [7 wavelength channels] %07d

File: la_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Flags 0010 4-character code representing system status %4s
5 BapB 9999.99 Aerosol light absorption coefficient (Mm-1), blue (PSAP=467 nm; CLAP=467 nm) channel. %07.2f
6 BapG 9999.99 Aerosol light absorption coefficient (Mm-1), green (PSAP=530 nm; CLAP=528 nm) channel. %07.2f
7 BapR 9999.99 Aerosol light absorption coefficient (Mm-1), red (PSAP=660 nm; CLAP=652 nm) channel. %07.2f
8 TrB 9.999 %05.3f
9 TrG 9.999 %05.3f
10 TrR 9.999 %05.3f
*Note lae files are generated when edits and corrections are applied to la_ files.
File: nbN_eS<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1-10 Same as lae same as lae Same as lae same as lae
11 Flight_Seg_Id required field Unique identifier for segment, YYYY_DDD_X_SITE_SEG, where YYYY=year, DDD=day of year, X=sequence label A..Z, SITE=location label, SEG=segment label (1000s feet) %s


File: lm_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Q_clap_slpm ±9.99 CLAP flow rate %05.2f
5 TrG 9.999 Transmittance -- green %05.3f
6 I_sampleG 9999999 Sample Intensity-- green %07d
7 I_refG 9999999 Reference Intensity-- green %07d
8 I_sam_rsd_ppmG -- green %07d
9 I_ref_rsd_ppmG -- green %07d
If the lm_ file comes from a CLAP or 1WPSAP the lm_ files end with column 9.
If the lm_ files comes from a 3WPSAP the following 10 columns are included.
10 TrB 9.999 Transmittance -- blue %05.3f
11 I_sampleB 9999999 Sample Intensity -- blue %07d
12 I_refb 9999999 Reference Intensity -- blue %07d
13 I_sam_rsd_ppmB -- blue %07d
14 I_ref_rsd_ppmB -- blue %07d
15 TrR 9.999 Transmittance -- red %05.3f
16 I_sampleR 9999999 Sample Intensity -- red %07d
17 I_refR 9999999 Reference Intensity -- red %07d
18 I_sam_rsd_ppmR -- red %07d
19 I_ref_rsd_ppmR -- red %07d

File: lw_<timecode>.<STN>
Return to File-Code Note:high frequency data files may only have first 19 fields.
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Flags 0011 4-character code representing system status %4s
5 Bap_B 9999.99 Aerosol light absorption coefficient (Mm-1), blue channel. %07.2f
6 Bap_G 9999.99 Aerosol light absorption coefficient (Mm-1), green channel. %07.2f
7 Bap_R 9999.99 Aerosol light absorption coefficient (Mm-1), red channel. %07.2f
8 RefBsp_B 9999.99 Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Blue channel %07.2f
9 RefBsp_G 9999.99 Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Green channel %07.2f
10 RefBsp_R 9999.99 Aerosol total light scattering coefficient (Mm-1), Ref. Neph. Red channel %07.2f
11 RH_refNeph 999.9 Relative humidity (percent) inside ref. nephelometer. %05.1f
12 T_refNeph 999.9 Temperature (deg C) inside ref. nephelometer. %05.1f
13 P_refNeph 9999.9 Pressure inside reference nephelometer (hPa) %6.1f
14 TrB 9.999 Transmittance blue %05.3f
15 TrG 9.999 Transmittance green %05.3f
16 TrR 9.999 Transmittance red %05.3f
17 Q_clap_slpm ±9.999 CLAP flow rate %05.3f
18 RH_psap 999.9 Relative humidity (percent) inside PSAP %05.1f
19 T_psap 999.9 Temperature (deg C) inside PSAP %05.1f
20 I_sampleB 9999999 Sample Intensity blue %07d
21 I_sampleG 9999999 Sample Intensity green %07d
22 I_sampleR 9999999 Sample Intensity red %07d
23 I_refB 9999999 Reference Intensity blue %07d
24 I_refG 9999999 Reference Intensity green %07d
25 I_refR 9999999 Reference Intensity red %07d
26 I_ref_rsdB 9999999 Ref. Int. rsd blue %07d
27 I_ref_rsdG 9999999 Ref. Int. rsd green %07d
28 I_ref_rsdR 9999999 Ref. Int. rsd red %07d
29 I_sam_rsdB 9999999 Samp. Int. rsd blue %07d
30 I_sam_rsdG 9999999 Samp. Int. rsd green %07d
31 I_sam_rsdR 9999999 Samp. Int. rsd red %07d

File: m__<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 M_Monitor (string of variable length) General system monitor notes and records. This string may contain embedded spaces and/or commas. %s


File: me_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code. %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 T_ambient ±99.9 local temperature (deg C) %5.1f
5 RH_ambient ±999.9 local relative humidity (%) %6.1f
6 P_ambient ±9999.9 local pressure (hPa) %7.1f
7 WS ±99.9 local wind speed (m s-1) %5.1f
8 WD ±999 local wind direction (degrees True) %4d
9 Visibility ±999.9 local visibility (km) %6.1f
10 Weather 99 2-digit code for current weather, "TI" value Type Intensity 0 none --
1 unknown very light
2 drizzle light
3 rain moderate
4 snow heavy
5 hail very heavy
6 freezing unknown
7 freezing drizzle
8 freezing rain
%2d
11 Cloud_base_m 9999 height of lowest layer of cloud, in meters above ground level %4d
12 Opacity_layer1 99 opacity of lowest layer of cloud, in 10th's %2d
13 Opacity_total 99 opacity of total cloud cover, in 10th's %2d
14 Fog1 999 frequency of fog with LWC>0.05 g/m3 (%) %3d
15 Fog2 999 frequency of fog with LWC>0.15 g/m3 (%) %3d
16 Solar_flux 9999 broadband solar irradiance, W/m2 %4d

File: na_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Flags 0010 4-character code representing system status %4s
5 BspB 9999.99 Aerosol total light scattering coefficient (Mm-1), Neph. Blue channel %07.2f
6 BspG 9999.99 Aerosol total light scattering coefficient (Mm-1), Neph. Green channel %07.2f
7 BspR 9999.99 Aerosol total light scattering coefficient (Mm-1), Neph. red channel %07.2f
8 BbspB 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Neph blue channel %07.2f
9 BbspG 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Neph. green channel %07.2f
10 BbspR 9999.99 Aerosol backwards-hemispheric light scattering coefficient (Mm-1), Neph. red channel %07.2f
11 T_inlet 999.9 Temperature (deg C) at ref. nephelometer inlet. %05.1f
12 RH_neph 999.9 Relative humidity (percent) at ref. nephelometer inlet %05.1f
13 T_neph 999.9 Temperature (deg C) inside ref. nephelometer. %05.1f
14 P_neph 999.9 Pressure inside ref. nephelometer. (hPa) %05.1f

File: nb_<timecode>.<STN>
Return to File-Code

The nb_ file format is identical to the na_ format. It stores data that has undergone zero-correction (generated by cnvtnb_).

nbN_e files are nb_ files with edits and standard correctiions applied to them

nbN_eS files are nbN_e files with segment averages appended to them

File: nc_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 EndTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) of the end of the calibration. %09.5f
4 Bsp_B_bkg ±9.999e-99 Background blue (m-1) %10.3e
5 Bsp_G_bkg ±9.999e-99 Background green (m-1) %10.3e
6 Bsp_R_bkg ±9.999e-99 Background red (m-1) %10.3e
7 Bbsp_B_bkg ±9.999e-99 Backscatter Background blue (m-1) %10.3e
8 Bbsp_G_bkg ±9.999e-99 Backscatter Background green (m-1) %10.3e
9 Bbsp_R_bkg ±9.999e-99 Backscatter Background red (m-1) %10.3e

File: ne_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Mode 9999 Code representing nephelometer system state %4s
5 Flags not applicable nephelometer status (4 digits on TSI nephelometers) %4s


File: nk_<timecode>.<STN>
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The nk_ file consists of a series of data reports resulting from a nephelometer span check. The span check is our in-field method for checking nephelometer calibration. Each of the 6 types of reports is described below along with tabular representation of the report contents.

File: nz_<timecode>.<STN>
Return to File-Code

The nz_ file format is identical to the na_ format. It stores zero data fields generated by cnvtnz_.

1 - SC_den{GAS}

These reports are named: SC_denAIR and SC_denCO2. These give the average T/P/RH during the AIR and CO2 measurement periods, as well as the average density ratio and lamp power. The density ratio is the air density in the sample volume divided by the air density at STP (273.15 K, 1013.25 hPA).

Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 report title n/a SC_den{GAS} %9s
5 Press_hPa 9999.99 neph pressure (hPa) %07.2f
6 Temp_K 999.99 neph temperature (K) %06.2f
7 RH 999.9 neph relative humidity %05.1f
8 Den 99.99999 Gas density ratio %08.5f
9 Power 999.9 Neph lamp power (W) %05.1f
2 - SC_Hz{chopper phase}

These reports are named: SC_HzCAL, SC_HzDark, SC_HzAIR, and SC_HzCO2. These give the average photon count frequencies of during the different phases of the chopper rotation: Calibrator, Dark, Sample_AIR, and Sample_CO2.

Col # Name Format and mvc Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 report title n/a SC_Hz{chopper phase} %9s
5 {Phase}_TS_B 99.999e-99 total scatter blue for {chopper phase} %010.3e
6 {Phase}_TS_G 99.999e-99 total scatter green for {chopper phase} %010.3e
7 {Phase}_TS_R 99.999e-99 total scatter red for {chopper phase} %010.3e
8 {Phase}_BS_B 99.999e-99 backscatter blue for {chopper phase} %010.3e
9 {Phase}_BS_G 99.999e-99 backscatter green for {chopper phase} %010.3e
10 {Phase}_BS_R 99.999e-99 backscatter red for {chopper phase} %010.3e
3 - SC_sAirHz

This gives the sensitivity of the instrument to filtered air at STP. It is the the increase in the photon count frequency when the instrument is filled with air at STP, compared to the hypothetical value when the instrument is evacuated.

Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 report title n/a SC_sAirHz %9s
5 sAir_TS_B 99.999e-99 Sensitivity of total scatter blue %010.3e
6 sAir_TS_G 99.999e-99 Sensitivity of total scatter green %010.3e
7 sAir_TS_R 99.999e-99 Sensitivity of total scatter red %010.3e
8 sAir_BS_B 99.999e-99 Sensitivity of back scatter blue %010.3e
9 sAir_BS_G 99.999e-99 Sensitivity of back scatter green %010.3e
10 sAir_BS_R 99.999e-99 Sensitivity of back scatter red %010.3e

4 - SC_Bsp{GAS}

These are the measured average scattering coefficients (Rayleigh-subtracted) reported by the neph during the AIR and CO2 measurement periods. They are at the T/P/RH reported in the denAIR and denCO2 records.

Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 report title n/a SC_Bsp{GAS} %8s
5 Bsp{GAS}_B 99.999e-99 Sensitivity of total scatter blue %010.3e
6 Bsp{GAS}_G 99.999e-99 Sensitivity of total scatter green %010.3e
7 Bsp{GAS}_R 99.999e-99 Sensitivity of total scatter red %010.3e
8 Bbsp{GAS}_B 99.999e-99 Sensitivity of back scatter blue %010.3e
9 Bbsp{GAS}_G 99.999e-99 Sensitivity of back scatter green %010.3e
10 Bbsp{GAS}_R 99.999e-99 Sensitivity of back scatter red %010.3e


5 - SC_BsgCO2

This is the measured Rayleigh scattering coefficient of CO2, adjusted to STP.

Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 report title n/a SC_BsgCO2 %9s
5 BsgCO2_B 99.999e-99 Measured Rayleigh total scatter blue %010.3e
6 BsgCO2_G 99.999e-99 Measured Rayleigh total scatter green %010.3e
7 BsgCO2_R 99.999e-99 Measured Rayleigh total scatter red %010.3e
8 BbsgCO2_B 99.999e-99 Measured Rayleigh back scatter blue %010.3e
9 BbsgCO2_G 99.999e-99 Measured Rayleigh back scatter green %010.3e
10 BbsgCO2_R 99.999e-99 Measured Rayleigh back scatter red %010.3e

6 - SC_PctErr

This is the percentage error between the measured Rayleigh scattering coefficient of CO2 and the literature values.

Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 report title n/a SC_PctErr %9s
5 Err_TS_B 99.999e-99 Percent error total scatter blue %010.3e
6 Err_TS_G 99.999e-99 Percent error total scatter green %010.3e
7 Err_TS_R 99.999e-99 Percent error total scatter red %010.3e
8 Err_BS_B 99.999e-99 Percent error back scatter blue %010.3e
9 Err_BS_G 99.999e-99 Percent error back scatter green %010.3e
10 Err_BS_R 99.999e-99 Percent error back scatter red %010.3e

File: nm_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Press_hPa ±9999.9 Pressure inside nephelometer. (hPa) %07.1f
5 Temp_K ±999.9 Temperature inside nephelometer (K) %06.1f
6 Ref_green ±9.999e-99 Nephelometer Green Reference (Hz) %010.3e
7 Lamp_neph_V ±9.999e-99 Voltage supplying nephelometer lamp (V) %010.3e
8 Lamp_I_A ±9.9 Current supplying nephelometer lamp (A) %04.1f
9 Neph_RH ±999.9 Relative Humidity (%) inside neph %06.1f
10 T_inlet ±999.9 Temperature of inlet air (K) %06.1f
11 Aux_BNC_in 9999 BNC Auxiliary input (mV) %04d
...before format v2.0, these fields are:
8 Bkg_blue_1_m ±9.999e-99 Background blue (m-1) %010.3e
9 Bkg_green_1_m ±9.99e9-99 Background green (m-1) %010.3e
10 Bkg_red_1_m ±9.99e9-99 Background red (m-1) %010.3e
File: ns_<timecode>.<STN>
Return to File-Code
[same format as ne_<timecode>.<STN>]
File: oc_<timecode>.<STN>
Return to File-Code
[same format as nc_<timecode>.<STN>, but for second nephelometer]
File: om_<timecode>.<STN>
Return to File-Code
[same format as nm_<timecode>.<STN>, but for second nephelometer]
File: os_<timecode>.<STN>
Return to File-Code
[same format as ns_<timecode>.<STN>, but for second nephelometer]
File: p__<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Vis_alarm Visibility Alarm
5 HW_Alarm Hardware Alarm
6 Vis_1min

visibility 10 minute average max 20000m

7 Vis_10min

visibility 1 minute average max 20000m

8 NWS_Code Instant present weather %3s
9 PWC_Instant

Instant present weather code, 0 ... 99

10 PWC_15min

15 min present weather code, 0 ... 99

11 PWC_Hour

hour present weather code, 0 ... 99

12 Water_Intensity

Water Intensity 1 min average mm/h

13 Cum_Water

Cumulative water sum, 0 ... 99.99 mm

14 Cum_Snow

Cumulative snow sum, 0 ... 999 mm

File: pm_<timecode>.<STN>
Return to File-Code Written at the monitor interval (usually 15 minutes). Contains instantaneous values for a given control (the address of which is the first field). Written once for each control on the chain.
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Addr
5 PV
6 SP1
7 SP2
8 Status

File: si_<timecode>.<STN>
more info...
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 flags 0010 4-character code representing system status %4s
5 Wavelength ±550 wavelength for calculated and measured scattering (nm) %4.1f
6 RefIndR_sub ±1.50 real part of refractive index for sub-um %5.3f
7 RefIndR_tot ±1.50 real part of refractive index for sub-10um %5.3f
8 RefIndI_sub ±0.005 imag. part of refractive index for sub-um %5.3f
9 RefIndI_tot ±0.005 imag. part of refractive index for sub-10um %5.3f
10 RefBsp_G ±9999.99 measured scattering at 550 nm (Mm-1) %7.2f
11 nt1 ±99999.9 calculated number concentration for sub-um (cm-3) %7.1f
12 nt10 ±99999.9 calculated number concentration for sub-10um (cm-3) %7.1f
13 dg1 ±99.999 calculated geometric mean diameter for sub-um (um) %6.3f
14 dg10 ±99.999 calculated geometric mean diameter for sub-10um (um) %6.3f
15 vt1 ±99999.9 calculated volume for sub-um (cm-3) %7.1f
16 vt10 ±99999.9 calculated volume for sub-10um (cm-3) %7.1f
17 dgV1 ±99.999 calculated volume diameter for sub-um (um) %6.3f
18 dgV10 ±99.999 calculated volume diameter for sub-10um (um) %6.3f
19 bsp1 ±9999.99 calculated scattering for sub-um (Mm-1) %7.2f
20 bsp10 ±9999.99 calculated scattering for sub-10um (Mm-1) %7.2f
21 bap1 ±9999.99 calculated absorption for sub-um (Mm-1) %7.2f
22 bap10 ±9999.99 calculated absorption for sub-10um (Mm-1) %7.2f
23 angRB ±99.99 Angstrom exponent for red-blue neph data %5.2f

File: sm_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Event_Type (string) event from scheduled tasks %s
File: sr_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 flags 0010 4-character code representing system status %4s
5 ZeroAir ±99.9 Zero air flow (lpm) %5.1f
6 SampInt ±999.9 Sample interval (s) %5.1f
7 Activity ±99.99 Activity (%) %5.2f
8 Ref_V ±9.99 Laser reference voltage (V) %5.2f
9 SampFlow ±9.999 Sample flow (lpm) %6.3f
10 SheathFlow ±9.999 Sheath air flow (lpm) %6.3f
11-42 N(i) ±99999.9 Number of particles in bin(i) %7.1f
File: ss_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 seconds ±999 Elapsed seconds this sampling period %04d
5 samples ±999 Number of samples taken this sampling period %04d
File: ua_<timecode>.<STN> and um_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Temp_C 35.05 temperature of umac %05.2f
5 PS_volts 05.05 power supply voltage %05.2f
6 AIN00 -000.496 analog input to umac %08.3f
7 AIN01 -000.496 analog input to umac %08.3f
8 AIN02 -000.496 analog input to umac %08.3f
9 AIN03 -000.496 analog input to umac %08.3f
10 AIN04 -000.496 analog input to umac %08.3f
11 AIN05 -000.496 analog input to umac %08.3f
12 AIN06 -000.496 analog input to umac %08.3f
13 AIN07 -000.496 analog input to umac %08.3f
14 AIN08 -000.496 analog input to umac %08.3f
15 AIN09 -000.496 analog input to umac %08.3f
16 AIN10 -000.496 analog input to umac %08.3f
17 AIN11 -000.496 analog input to umac %08.3f
18 AIN12 -000.496 analog input to umac %08.3f
19 AIN13 -000.496 analog input to umac %08.3f
20 AIN14 -000.496 analog input to umac %08.3f
21 AIN15 -000.496 analog input to umac %08.3f
22 AIN16 -000.496 analog input to umac %08.3f
23 AIN17 -000.496 analog input to umac %08.3f
24 AIN18 -000.496 analog input to umac %08.3f
25 AIN19 -000.496 analog input to umac %08.3f
26 AIN20 -000.496 analog input to umac %08.3f
27 AIN21 -000.496 analog input to umac %08.3f
28 AIN22 -000.496 analog input to umac %08.3f
29 AIN23 -000.496 analog input to umac %08.3f
File: ud_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 state 0003 digital state of umac %4s
File: vol<timecode>.<STN>
File: vol<timecode>.<STN> see volumes<timecode>.STN
File: volumes<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Volume_info (string) Sampling volume information. (may contain embedded tabs, spaces, and/or commas) %s

File: w__<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Flags 0010 4-character code representing system status %4s
5 Wind_Spd
6 Wind_Dir

File: wm_<timecode>.<STN>
Return to File-Code

Written at the monitor interval (usually 15 minutes). Contains the instantaneous values of the two setpoint channels.

Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 012.12345 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 Sp_Chan_A
5 Sp_Chan_B

File: wx_<timecode>.<STN>
Return to File-Code
Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID XXX 3-character ID code %3s
2 Year 9999 Year %4d
3 StartTime_UTC 999.99999 DOY and FRACTIONAL_DOY (January 1 = 1) %09.5f
4 F_xxx
F_amb
FFFF
FFFFFFFF
Flags field (link to definition of wx_ flag specification) %4.4X
%8.8X
5 T_xxx 999.9 Temperature (deg C) %05.1f
6 U_xxx 999.9 Relative Humidity (%) %05.1f
7 P_xxx 9999.9 Pressure (hPa) %06.1f
8 WS_xxx 99.9 Wind speed (m/s) %04.1f
9 WD_xxx 999 Wind direction (deg true) %03d
10 Wz_xxx 999.99 Visibility (km) %06.2f
11 Wx_xxx 999 3-digit code for current weather, "TI"
000-099 WMO SYNOP Code Table 4680
100-199 WSA Specific Codes (Last Two digits)
xxx NWS
bCx
bPx
bLx
bRx
bSx
Ipx
ZLx
ZRx
x=intensity code (minus, plus, blank)
b=blank space
%03s
Record Type xxx Variable Name Data Source
wx_ amb Best Available Source Source
wx1_ aer GMD AERO Group
wx2_ gmd GMD OBS Group
wx3_ arm ARM Sensors
wx4_ stn Station-Specific Sensors

File: a_[AHMD]<timecode>.<STN> [average format]
Return to File-Code

Averages reported in fields 5 through 22 are by default the geometric average, and a corresponding geometric standard deviation. If the corresponding "N" in field 44 through 58 is negative, the average and standard deviation for that measurement is arithmetic, not geometric. Also, arithmetic averaging is used to calculate the hourly average and 2-hourly average files.

The reported geometric standard deviation is a dimensionless number, calculated as the standard deviation of the natural logarithm of the input data. If the input data are log-normally distributed with geometric average "avg" and geometric standard deviation "gsd", then 68% of the data will fall within the interval between (avg * exp(gsd)) and (avg / exp(gsd)).

Fields 6-13 refer to the "default" size range, which has either no upper size cut or a 10-um upper size cut (aerodynamic diameter). Fields 15-22 are for the "alternate" size range, which has a 1-um upper size cut (aerodynamic diameter).

Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 123.12 Integer part is Day of Year,
1 = January 1. Fractional part is time at the start of the averaging interval, UTC.
%6.2f
4 Flags 0011 4-character code representing system status. %4s
5 CN_control ±9.999e-99 Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "control" inlet %10.3e
6 CN_ambient (default size) ±9.999e-99 Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "ambient" inlet %10.3e
7 Bap_G (default size) ±9.999e-99 Aerosol light absorption coefficient (m-1), green channel. %10.3e
8 Bsp_B (default size) ±9.999e-99 Aerosol total light scattering coefficient (m-1), blue channel. %10.3e
9 Bsp_G (default size) ±9.999e-99 Aerosol total light scattering coefficient (m-1), green channel. %10.3e
10 Bsp_R (default size) ±9.999e-99 Aerosol total light scattering coefficient (m-1), red channel. %10.3e
11 Bbsp_B
-or-
Bsp_NIR (default size)
±9.999e-99 Aerosol backwards-hemispheric light scattering coefficient (m-1), blue channel. For stations equipped with 4-wavelength nephelometers, this field is aerosol total light scattering coefficient (m-1), near infrared channel. %10.3e
12 Bbsp_G (default size) ±9.999e-99 Aerosol backwards-hemispheric light scattering coefficient (m-1), green channel. %10.3e
13 Bbsp_R (default size) ±9.999e-99 Aerosol backwards-hemispheric light scattering coefficient (m-1), red channel. %10.3e
14 Neph_RH ±999 Relative Humidity (percent) inside nephelometer %4d
15 CN_ambient,
(alternate size)
±9.999e-99 Aerosol number concentration (cm-3) at ambient T&P, measured with CNC on "ambient" inlet %10.3e
16 Bap_G,
(alternate size)
±9.999e-99 Aerosol light absorption coefficient (m-1), green channel. %10.3e
17 Bsp_B,
(alternate size)
±9.999e-99 Aerosol total light scattering coefficient (m-1), blue channel. %10.3e
18 Bsp_G,
(alternate size)
±9.999e-99 Aerosol total light scattering coefficient (m-1), green channel. %10.3e
19 Bsp_R,
(alternate size)
±9.999e-99 Aerosol total light scattering coefficient (m-1), red channel. %10.3e
20 Bbsp_B
-or-
Bsp_NIR,
(alternate size)
±9.999e-99 Aerosol backwards-hemispheric light scattering coefficient (m-1), blue channel. For stations equipped with 4-wavelength nephelometers, this field is aerosol total light scattering coefficient (m-1), near infrared channel. %10.3e
21 Bbsp_G,
(alternate size)
±9.999e-99 Aerosol backwards-hemispheric light scattering coefficient (m-1), green channel. %10.3e
22 Bbsp_R,
(alternate size)
±9.999e-99 Aerosol backwards-hemispheric light scattering coefficient (m-1), red channel. %10.3e
23 SD_CN_control ±9.999e-99 Standard deviation of CN_control data this period %10.3e
24 SD_CN_ambient ±9.999e-99 Standard deviation of CN_ambient data this period %10.3e
25 SD_Bap_G ±9.999e-99 Standard deviation of Bap_G data this period %10.3e
26 SD_Bsp_B ±9.999e-99 Standard deviation of Bsp_B data this period %10.3e
27 SD_Bsp_G ±9.999e-99 Standard deviation of Bsp_G data this period %10.3e
28 SD_Bsp_R ±9.999e-99 Standard deviation of Bsp_R data this period %10.3e
29 SD_Bbsp_B
-or-
SD_Bsp_NIR
±9.999e-99 Standard deviation of Bbsp_B or Bsp_NIR data this period %10.3e
30 SD_Bbsp_G ±9.999e-99 Standard deviation of Bbsp_G data this period %10.3e
31 SD_Bbsp_R ±9.999e-99 Standard deviation of Bbsp_R data this period %10.3e
32 SD_Neph_RH ±999 Standard deviation of Neph_RH data this period %4d
33 SD_CN_ambient,
(alternate size)
±9.999e-99 Standard deviation of CN_ambient (alternate size) data this period %10.3e
34 SD_Bap,
(alternate size)
±9.999e-99 Standard deviation of Bap (alternate size) data this period %10.3e
35 SD_Bsp_B,
(alternate size)
±9.999e-99 Standard deviation of Bsp_B (alternate size) data this period %10.3e
36 SD_Bsp_G,
(alternate size)
±9.999e-99 Standard deviation of Bsp_G (alternate size) data this period %10.3e
37 SD_Bsp_R,
(alternate size)
±9.999e-99 Standard deviation of Bsp_R (alternate size) data this period %10.3e
38 SD_Bbsp_B
-or-
SD_Bsp_NIR,
(alternate size)
±9.999e-99 Standard deviation of Bbsp_B or Bsp_NIR (alternate size) data this period %10.3e
39 SD_Bbsp_G,
(alternate size)
±9.999e-99 Standard deviation of Bbsp_G (alternate size) data this period %10.3e
40 SD_Bbsp_R,
(alternate size)
±9.999e-99 Standard deviation of Bbsp_R (alternate size) data this period %10.3e
41 N_CN_control ±99999 Number of data points used in computation %6d
42 N_CN_ambient ±99999 Number of data points used in computation %6d
43 N_Bap_G ±99999 Number of data points used in computation %6d
44 N_Bsp_B ±99999 Number of data points used in computation %6d
45 N_Bsp_G ±99999 Number of data points used in computation %6d
46 N_Bsp_R ±99999 Number of data points used in computation %6d
47 N_Bbsp_B
-or-
N_Bsp_NIR
±99999 Number of data points used in computation %6d
48 N_Bbsp_G ±99999 Number of data points used in computation %6d
49 N_Bbsp_R ±99999 Number of data points used in computation %6d
50 N_Neph_RH ±99999 Number of data points used in computation %6d
51 N_CN_ambient,
(alternate size)
±99999 Number of data points used in computation %6d
52 N_Bap_G,
(alternate size)
±99999 Number of data points used in computation %6d
53 N_Bsp_B,
(alternate size)
±99999 Number of data points used in computation %6d
54 N_Bsp_G,
(alternate size)
±99999 Number of data points used in computation %6d
55 N_Bsp_R,
(alternate size)
±99999 Number of data points used in computation %6d
56 N_Bbsp_B
-or-
N_Bsp_NIR,
(alternate size)
±99999 Number of data points used in computation %6d
57 N_Bbsp_G,
(alternate size)
±99999 Number of data points used in computation %6d
58 N_Bbsp_R,
(alternate size)
±99999 Number of data points used in computation %6d



File: la_[AHMD]<timecode>.<STN> [average format for la_ file type]
Return to File-Code

Averages reported in fields 5 through 10 are by default the geometric average, and a corresponding geometric standard deviation. If the corresponding "N" in field 17 through 22 is negative, the average and standard deviation for that measurement is arithmetic, not geometric. Also, arithmetic averaging is used to calculate the hourly average and 2-hourly average files.

The reported geometric standard deviation is a dimensionless number, calculated as the standard deviation of the natural logarithm of the input data. If the input data are log-normally distributed with geometric average "avg" and geometric standard deviation "gsd", then 68% of the data will fall within the interval between (avg * exp(gsd)) and (avg / exp(gsd)).

Col # Name Format and Missing Value Code (mvc) Description Scanf info
1 Station_ID WSA 3-character ID code %3s
2 Year 1993 Year %4d
3 StartTime_UTC 123.12 Integer part is Day of Year,
1 = January 1. Fractional part is time at the start of the averaging interval, UTC.
%6.2f
4 Flags 0011 4-character code representing system status. %4s
5 Bap_B, (default size) ±9.999e-99 Aerosol total light absorption coefficient (m-1), blue channel. %10.3e
6 Bap_G, (default size) ±9.999e-99 Aerosol total light absorption coefficient (m-1), green channel. %10.3e
7 Bap_R, (default size) ±9.999e-99 Aerosol total light absorption coefficient (m-1), red channel. %10.3e
8 Bap_B, (alternate size) ±9.999e-99 Aerosol total light absorption coefficient (m-1), blue channel. %10.3e
9 Bap_G, (alternate size) ±9.999e-99 Aerosol total light absorption coefficient (m-1), green channel. %10.3e
10 Bap_R, (alternate size) ±9.999e-99 Aerosol total light absorption coefficient (m-1), red channel. %10.3e
11 SD_Bap_B ±9.999e-99 Standard deviation of Bap_B data this period %10.3e
12 SD_Bap_G ±9.999e-99 Standard deviation of Bap_G data this period %10.3e
13 SD_Bap_R ±9.999e-99 Standard deviation of Bap_R data this period %10.3e
14 SD_Bap_B, (alternate size) ±9.999e-99 Standard deviation of Bap_B (alternate size) data this period %10.3e
15 SD_Bap_G, (alternate size) ±9.999e-99 Standard deviation of Bap_G (alternate size) data this period %10.3e
16 SD_Bap_R, (alternate size) ±9.999e-99 Standard deviation of Bap_R (alternate size) data this period %10.3e
17 N_Bap_B
±99999 Number of data points used in computation %6d
18 N_Bap_G
±99999 Number of data points used in computation %6d
19 N_Bap_R
±99999 Number of data points used in computation %6d
20 N_Bap_B, (alternate size)
±99999 Number of data points used in computation %6d
21 N_Bap_G, (alternate size)
±99999 Number of data points used in computation %6d
22 N_Bap_R, (alternate size)
±99999 Number of data points used in computation %6d



FLAGS Field Specification

The flags field is the 4-character hexadecimal representation of a 16-bit integer. It is used in the a_, ad_, and h_ files.

Char. / Bit Pos. Hex bit mask Description Bit set (1) Bit clear (0)
1 Project specific
1:3 0x8000 Not used yet
1:2 0x4000 Not used yet
1:1 0x2000 Not used yet
1:0 0x1000 Not used yet
2 Corrections applied to data
2:3 0x0800 Dilution Corrections Corrections Applied Corrections Not Applied
2:2 0x0400 neph truncation corrections corrections applied corrections not applied
2:1 0x0200 PSAP spot size and calibration corrections corrections applied corrections not applied
2:0 0x0100 STP corrections data corrected to STP data not corrected to STP
3 Sampling conditions
3:3 0x0080 Zero Subtraction Corrections corrections applied corrections not applied
3:2 0x0040 Not used
3:1 0x0020 PSAP filter loading transmittance < 0.7 (Bap data less reliable) transmittance >= 0.7
3:0 0x0010 Analyzer impactor state Alternate size range
(valve closed) Default size range
(valve open)
4 Sampling conditions
4:3 0x0008 Wind sector control - best available wind bird Wind speed or direction indicate local pollution is likely Local pollution absent
4:2 0x0004 Wind sector control- aerosol wind bird Wind speed or direction indicate local pollution is likely Local pollution absent
4:1 0x0002 Manual contamination check Local pollution present Local pollution absent
4:0 0x0001 Automatic contamination controller Local pollution present Local pollution absent

The default size range is defined to be the total from 0-10 micrometers aerodynamic diameter. The alternate size range is from 0-1 micrometers aerodynamic diameter.


wx_ File FLAGS Field Specification

The flags field is the 4-character hexadecimal representation of a 32-bit integer. This specification is exclusively used in the wx_ file. The flags field of the wx_ file is organized into two parts: 0x XXXX 0000 Where the XXXX (bits 16-32) segment is specific to the wx_ file (see specification table below) and the 0000 (bits 1-16) segment is the standard for all file types (see above specification). The two combined into a 32 bit flag gives the complete wx_ file specification.


Char. / Bit Pos. Use wx1 wx2 wx3
1-4 Contamination (see above table for bits 1-16)
5-16 Reserved (see above table for bits 1-16)
17-18:1 F 0x 0001 XXXX 0x 0002 XXXX 0x 0003 XXXX
19-20:1 T 0x 0004 XXXX 0x 0008 XXXX 0x 000C XXXX
21-22:2 U 0x 0010 XXXX 0x 0020 XXXX 0x 0030 XXXX
23-24:2 P 0x 0040 XXXX 0x 0080 XXXX 0x 00C0 XXXX
25-26:3 Ws 0x 0100 XXXX 0x 0200 XXXX 0x 0300 XXXX
27-28:3 Wd 0x 0400 XXXX 0x 0800 XXXX 0x 0C00 XXXX
29-30:4 Wz 0x 1000 XXXX 0x 2000 XXXX 0x 3000 XXXX
31-32:4 Wx 0x 4000 XXXX 0x 8000 XXXX 0x C000 XXXX