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 04 29 12:00     -1.00000   91.15432   -1.15432   69.61325
2024 04 29 13:00      5.58835   80.09194    9.90806   79.04041
2024 04 29 14:00      2.72805   68.67480   21.32520   88.35155
2024 04 29 15:00      1.84090   57.20832   32.79168   98.35961
2024 04 29 16:00      1.43932   46.07411   43.92589  110.27638
2024 04 29 17:00      1.23386   35.93067   54.06933  126.20979
2024 04 29 18:00      1.13344   28.15254   61.84746  149.55349
2024 04 29 19:00      1.10465   25.21202   64.78798  181.55545
2024 04 29 20:00      1.13910   28.68142   61.31858  213.00024
2024 04 29 21:00      1.24684   36.74823   53.25177  235.55209
2024 04 29 22:00      1.46428   47.01192   42.98808  251.01744
2024 04 29 23:00      1.89080   58.18504   31.81496  262.70649
2024 04 30 00:00      2.84983   69.64584   20.35416  272.62256
2024 04 30 01:00      6.11285   81.02429    8.97571  281.92638
2024 04 30 02:00     -1.00000   92.01478   -2.01478  291.41024
2024 04 30 03:00     -1.00000  102.27819  -12.27819  301.74040
2024 04 30 04:00     -1.00000  111.36954  -21.36954  313.55084
2024 04 30 05:00     -1.00000  118.68411  -28.68411  327.38075
2024 04 30 06:00     -1.00000  123.47479  -33.47479  343.37435
2024 04 30 07:00     -1.00000  125.04836  -35.04836    0.82740
2024 04 30 08:00     -1.00000  123.12878  -33.12878   18.19306
2024 04 30 09:00     -1.00000  118.04874  -28.04874   33.98021
2024 04 30 10:00     -1.00000  110.52182  -20.52182   47.58353
2024 04 30 11:00     -1.00000  101.28554  -11.28554   59.20694
2024 04 30 12:00     -1.00000   90.92685   -0.92685   69.40703

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