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
2026 10 07 13:00     -1.00000   91.28787   -1.28787   96.26848
2026 10 07 14:00      5.55972   80.03611    9.96389  106.12637
2026 10 07 15:00      2.81343   69.36494   20.63506  116.97166
2026 10 07 16:00      1.97914   59.77185   30.22815  129.66802
2026 10 07 17:00      1.62043   51.98914   38.01086  145.09955
2026 10 07 18:00      1.46429   47.01216   42.98784  163.66141
2026 10 07 19:00      1.43253   45.81078   44.18922  184.25892
2026 10 07 20:00      1.51176   48.67515   41.32485  204.26633
2026 10 07 21:00      1.73700   54.95442   35.04558  221.54510
2026 10 07 22:00      2.23819   63.60278   26.39722  235.73457
2026 10 07 23:00      3.51780   73.72503   16.27497  247.53662
2026 10 08 00:00      9.58752   84.69898    5.30102  257.85366
2026 10 08 01:00     -1.00000   96.09568   -6.09568  267.50745
2026 10 08 02:00     -1.00000  107.57528  -17.57528  277.27170
2026 10 08 03:00     -1.00000  118.78906  -28.78906  288.01441
2026 10 08 04:00     -1.00000  129.25993  -39.25993  300.89671
2026 10 08 05:00     -1.00000  138.19522  -48.19522  317.52920
2026 10 08 06:00     -1.00000  144.25925  -54.25925  339.44281
2026 10 08 07:00     -1.00000  145.80012  -55.80012    5.49720
2026 10 08 08:00     -1.00000  142.24394  -52.24394   30.32078
2026 10 08 09:00     -1.00000  134.81324  -44.81324   49.98205
2026 10 08 10:00     -1.00000  125.13239  -35.13239   64.87159
2026 10 08 11:00     -1.00000  114.29689  -24.29689   76.72324
2026 10 08 12:00     -1.00000  102.94317  -12.94317   86.96274
2026 10 08 13:00     -1.00000   91.47959   -1.47959   96.60581

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