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
2025 03 26 06:00     -1.00000  135.09025  -45.09025  336.42219
2025 03 26 07:00     -1.00000  137.64631  -47.64631  357.90306
2025 03 26 08:00     -1.00000  135.85777  -45.85777   19.69981
2025 03 26 09:00     -1.00000  130.20360  -40.20360   38.76129
2025 03 26 10:00     -1.00000  121.84225  -31.84225   54.19622
2025 03 26 11:00     -1.00000  111.83107  -21.83107   66.73324
2025 03 26 12:00     -1.00000  100.89308  -10.89308   77.43728
2025 03 26 13:00     26.63507   89.50473    0.49527   87.24076
2025 03 26 14:00      4.69074   78.02235   11.97765   96.95044
2025 03 26 15:00      2.52056   66.78798   23.21202  107.38368
2025 03 26 16:00      1.79434   56.23771   33.76229  119.53536
2025 03 26 17:00      1.46531   47.04946   42.95054  134.70146
2025 03 26 18:00      1.31011   40.32038   49.67962  154.19020
2025 03 26 19:00      1.25909   37.49094   52.50906  177.74106
2025 03 26 20:00      1.29345   39.43910   50.56090  201.74716
2025 03 26 21:00      1.42557   45.53722   44.46278  222.12054
2025 03 26 22:00      1.71162   54.35235   35.64765  238.02736
2025 03 26 23:00      2.32710   64.69771   25.30229  250.65208
2025 03 27 00:00      4.00726   75.82767   14.17233  261.34123
2025 03 27 01:00     15.22631   87.27206    2.72794  271.14229
2025 03 27 02:00     -1.00000   98.67807   -8.67807  280.89378
2025 03 27 03:00     -1.00000  109.69695  -19.69695  291.39204
2025 03 27 04:00     -1.00000  119.88036  -29.88036  303.53384
2025 03 27 05:00     -1.00000  128.55903  -38.55903  318.35679
2025 03 27 06:00     -1.00000  134.74017  -44.74017  336.69233

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