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 18 16:00      1.74205   55.07173   34.92827  122.97701
2024 09 18 17:00      1.44742   46.38367   43.61633  138.83617
2024 09 18 18:00      1.31223   40.42955   49.57045  158.96385
2024 09 18 19:00      1.27778   38.57389   51.42611  182.46621
2024 09 18 20:00      1.33139   41.39139   48.60861  205.49708
2024 09 18 21:00      1.49323   48.04379   41.95621  224.69235
2024 09 18 22:00      1.83811   57.15185   32.84815  239.75385
2024 09 18 23:00      2.61038   67.64436   22.35564  251.88470
2024 09 19 00:00      5.01213   78.84758   11.15242  262.32263
2024 09 19 01:00     33.60872   90.32414   -0.32414  272.04049
2024 09 19 02:00     -1.00000  101.73088  -11.73088  281.85183
2024 09 19 03:00     -1.00000  112.71137  -22.71137  292.57254
2024 09 19 04:00     -1.00000  122.78785  -32.78785  305.16295
2024 09 19 05:00     -1.00000  131.22754  -41.22754  320.74711
2024 09 19 06:00     -1.00000  136.94102  -46.94102  340.13070
2024 09 19 07:00     -1.00000  138.71707  -48.71707    2.39837
2024 09 19 08:00     -1.00000  136.06044  -46.06044   24.28564
2024 09 19 09:00     -1.00000  129.69030  -39.69030   42.88949
2024 09 19 10:00     -1.00000  120.84524  -30.84524   57.77910
2024 09 19 11:00     -1.00000  110.54357  -20.54357   69.91120
2024 09 19 12:00     -1.00000   99.45526   -9.45526   80.39115
2024 09 19 13:00     18.06024   88.02475    1.97525   90.14229
2024 09 19 14:00      4.22364   76.59971   13.40029   99.96840
2024 09 19 15:00      2.40070   65.53648   24.46352  110.70255
2024 09 19 16:00      1.75253   55.31219   34.68781  123.36325

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