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 01 11 20:00      2.18033   62.83655   27.16345  193.55241
2025 01 11 21:00      2.53613   66.94112   23.05888  208.26807
2025 01 11 22:00      3.47295   73.50204   16.49796  221.34278
2025 01 11 23:00      6.70558   81.90701    8.09299  232.72877
2025 01 12 00:00     -1.00000   91.61429   -1.61429  242.75292
2025 01 12 01:00     -1.00000  102.20215  -12.20215  251.89199
2025 01 12 02:00     -1.00000  113.34769  -23.34769  260.69484
2025 01 12 03:00     -1.00000  124.77906  -34.77906  269.84532
2025 01 12 04:00     -1.00000  136.20392  -46.20392  280.40221
2025 01 12 05:00     -1.00000  147.15836  -57.15836  294.44567
2025 01 12 06:00     -1.00000  156.55441  -66.55441  316.66694
2025 01 12 07:00     -1.00000  161.50163  -71.50163  353.89248
2025 01 12 08:00     -1.00000  158.55079  -68.55079   34.63828
2025 01 12 09:00     -1.00000  149.98049  -59.98049   60.47295
2025 01 12 10:00     -1.00000  139.29540  -49.29540   76.13529
2025 01 12 11:00     -1.00000  127.93411  -37.93411   87.37239
2025 01 12 12:00     -1.00000  116.46353  -26.46353   96.77494
2025 01 12 13:00     -1.00000  105.20150  -15.20150  105.59095
2025 01 12 14:00     -1.00000   94.41620   -4.41620  114.57366
2025 01 12 15:00      9.18776   84.41044    5.58956  124.29823
2025 01 12 16:00      3.94115   75.57471   14.42529  135.26529
2025 01 12 17:00      2.69780   68.41906   21.58094  147.86412
2025 01 12 18:00      2.23412   63.55033   26.44967  162.18411
2025 01 12 19:00      2.08940   61.53502   28.46498  177.74790
2025 01 12 20:00      2.16724   62.65675   27.34325  193.49040

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