Solar Geom Calc

Solar Geometry Calculator
Latitude:	Longitude:	UTC Start Date:	UTC End Date:	Local Time Zone:	Interval (secs):

Local Date Format: Show GMT: Airmass: Solar Zenith Angle: Elevation: Azimuth:

Local Etc/GMT
yyyy MM dd HH mm ss      AirMass   SolarZen       Elev       Azim
2021 01 25 23 00 00      5.09429   78.96254   11.03746  233.90077
2021 01 26 00 00 00     22.45993   88.50271    1.49729  244.20699
2021 01 26 01 00 00     -1.00000   99.58830   -9.58830  253.58058
2021 01 26 02 00 00     -1.00000  110.81227  -20.81227  262.61685
2021 01 26 03 00 00     -1.00000  122.26896  -32.26896  272.03063
2021 01 26 04 00 00     -1.00000  133.64219  -43.64219  282.87945
2021 01 26 05 00 00     -1.00000  144.43195  -54.43195  297.09938
2021 01 26 06 00 00     -1.00000  153.54718  -63.54718  318.55266
2021 01 26 07 00 00     -1.00000  158.46447  -68.46447  351.88789
2021 01 26 08 00 00     -1.00000  156.30541  -66.30541   29.00010
2021 01 26 09 00 00     -1.00000  148.51820  -58.51820   55.08138
2021 01 26 10 00 00     -1.00000  138.22597  -48.22597   71.68446
2021 01 26 11 00 00     -1.00000  127.00577  -37.00577   83.61208
2021 01 26 12 00 00     -1.00000  115.52779  -25.52779   93.45381
2021 01 26 13 00 00     -1.00000  104.15669  -14.15669  102.53953
2021 01 26 14 00 00     -1.00000   93.17930   -3.17930  111.68747
2021 01 26 15 00 00      7.52383   82.78574    7.21426  121.52884
2021 01 26 16 00 00      3.51878   73.67599   16.32401  132.63006
2021 01 26 17 00 00      2.46098   66.14652   23.85348  145.46996
2021 01 26 18 00 00      2.04921   60.88903   29.11097  160.23713
2021 01 26 19 00 00      1.91196   58.55493   31.44507  176.48844
2021 01 26 20 00 00      1.96498   59.50175   30.49825  193.04564
2021 01 26 21 00 00      2.23879   63.57839   26.42161  208.55173
2021 01 26 22 00 00      2.93378   70.22122   19.77878  222.22720
2021 01 26 23 00 00      4.99920   78.73854   11.26146  234.03218

Latitude:

-90.0 to +90.0, Negative for South, Positive for North.

Longitude:

-180.0 to +180.0, Negative for East, Positive for West.

Start Date:

Enter start date in the format yyyy-MM-dd HH:mm [UTC]

End Date:

Enter end date in the format yyyy-MM-dd HH:mm [UTC]

Interval:

The internal (in seconds) between successive solar calculations.

Date Format:

yy[yy] Format for years. Two or four digits.
M[MM] Format for months. MM=01-12, MMM=Jan-Dec, MMMM=January-December
d[d] Format for day of month. One or Two digits.
D[DD] Format for day-of-year. One to three digits (zero padded).
HH[or hh] Format for hour-of-day. HH=24 hr clock, hh=12 hr clock.
mm Format for minutes. mm=00-59.
ss Format for seconds. ss=00=59.
a AM/PM.
z Timezone Acronym.
Z Timezone hours offset. Examples: +0600, -0200

Examples:
yyyy/MM-dd_DDD hh:mm:ss aa
yyyyMMdd[DDD]HHmmss

Air mass

If the sun is below the horizon, Air mass = -1.0000. Toggle the checkbox to enable/disable column in report.

Air mass Calculation

Airmass = 1.0/(cos(90 - elev) + 0.50572 * (6.07995 + elev)^-1.6364)

Solar Zenith Angle

Solar elevation in Degrees from zenith (90°). Angles are corrected for atmospheric diffraction. Toggle the checkbox to enable/disable column in report.

Elevation:

Solar elevation in Degrees above horizon (0 degrees). Angles are corrected for atmospheric diffraction. Toggle the checkbox to enable/disable column in report.

Azimuth:

Sun azimuth, 0° = N, 90° = E, 180° = S, 270° = W. Toggle the checkbox to enable/disable column in report.

Solar Geometry Calculator