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 05 18 22:00      1.38781   43.97922   46.02078  256.55773
2024 05 18 23:00      1.75386   55.34247   34.65753  267.58958
2024 05 19 00:00      2.52225   66.80476   23.19524  277.01601
2024 05 19 01:00      4.69998   78.04763   11.95237  285.97062
2024 05 19 02:00     21.90464   88.79082    1.20918  295.18438
2024 05 19 03:00     -1.00000   98.71051   -8.71051  305.24438
2024 05 19 04:00     -1.00000  107.38395  -17.38395  316.67313
2024 05 19 05:00     -1.00000  114.25818  -24.25818  329.86167
2024 05 19 06:00     -1.00000  118.68733  -28.68733  344.83254
2024 05 19 07:00     -1.00000  120.10589  -30.10589    0.94850
2024 05 19 08:00     -1.00000  118.30002  -28.30002   16.98209
2024 05 19 09:00     -1.00000  113.53880  -23.53880   31.75211
2024 05 19 10:00     -1.00000  106.41151  -16.41151   44.70952
2024 05 19 11:00     -1.00000   97.55863   -7.55863   55.93846
2024 05 19 12:00     16.06311   87.51691    2.48309   65.85430
2024 05 19 13:00      4.25173   76.69412   13.30588   74.98626
2024 05 19 14:00      2.38878   65.40449   24.59551   83.92928
2024 05 19 15:00      1.69420   53.92578   36.07422   93.44021
2024 05 19 16:00      1.35651   42.58582   47.41418  104.72697
2024 05 19 17:00      1.17769   31.95457   58.04543  120.17077
2024 05 19 18:00      1.08896   23.39230   66.60770  144.68969
2024 05 19 19:00      1.06380   20.02043   69.97957  182.37680
2024 05 19 20:00      1.09553   24.17700   65.82300  218.84550
2024 05 19 21:00      1.19261   33.08930   56.91070  241.99933
2024 05 19 22:00      1.38460   43.84103   46.15897  256.78687

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