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:
Atmospheric Refraction Correction:

Local UTC     SolarZen and Elev Uncorrected for Atmospheric Refaction
yyyy MM dd HH:mm      AirMass   SolarZen       Elev       Azim
2024 09 12 11:00     -1.00000  109.10019  -19.10019   67.39833
2024 09 12 12:00     -1.00000   98.14946   -8.14946   77.91913
2024 09 12 13:00     13.72372   86.77001    3.22999   87.66997
2024 09 12 14:00      3.87473   75.31174   14.68826   97.43992
2024 09 12 15:00      2.27952   64.12353   25.87647  108.06906
2024 09 12 16:00      1.68384   53.66680   36.33320  120.62405
2024 09 12 17:00      1.40441   44.67959   45.32041  136.52140
2024 09 12 18:00      1.27414   38.36763   51.63237  157.11162
2024 09 12 19:00      1.23882   36.24736   53.75264  181.69207
2024 09 12 20:00      1.28600   39.03243   50.96757  205.90727
2024 09 12 21:00      1.43258   45.81261   44.18739  225.80268
2024 09 12 22:00      1.74205   55.07171   34.92829  241.13267
2024 09 12 23:00      2.41347   65.67626   24.32374  253.33147
2024 09 13 00:00      4.32667   76.93998   13.06002  263.76899
2024 09 13 01:00     19.93743   88.42683    1.57317  273.46889
2024 09 13 02:00     -1.00000   99.79593   -9.79593  283.25374
2024 09 13 03:00     -1.00000  110.69217  -20.69217  293.91883
2024 09 13 04:00     -1.00000  120.64312  -30.64312  306.36348
2024 09 13 05:00     -1.00000  128.94079  -38.94079  321.58857
2024 09 13 06:00     -1.00000  134.56673  -44.56673  340.25231
2024 09 13 07:00     -1.00000  136.41685  -46.41685    1.51580
2024 09 13 08:00     -1.00000  134.01842  -44.01842   22.56564
2024 09 13 09:00     -1.00000  127.97408  -37.97408   40.77911
2024 09 13 10:00     -1.00000  119.41012  -29.41012   55.58871
2024 09 13 11:00     -1.00000  109.30701  -19.30701   67.75210

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