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 12 15:00      1.73185   54.83412   35.16588   95.05863
2024 05 12 16:00      1.37797   43.55207   46.44793  106.58933
2024 05 12 17:00      1.19243   33.07566   56.92434  122.28325
2024 05 12 18:00      1.10087   24.79018   65.20982  146.56702
2024 05 12 19:00      1.07507   21.61280   68.38720  182.34433
2024 05 12 20:00      1.10798   25.57650   64.42350  217.04655
2024 05 12 21:00      1.20861   34.23920   55.76080  240.01993
2024 05 12 22:00      1.40865   44.85469   45.14531  255.03854
2024 05 12 23:00      1.79143   56.17517   33.82483  266.26457
2024 05 13 00:00      2.61037   67.64430   22.35570  275.83555
2024 05 13 01:00      5.04632   78.92923   11.07077  284.89612
2024 05 13 02:00     28.49081   89.74239    0.25761  294.19607
2024 05 13 03:00     -1.00000   99.75492   -9.75492  304.34525
2024 05 13 04:00     -1.00000  108.53664  -18.53664  315.89632
2024 05 13 05:00     -1.00000  115.51913  -25.51913  329.27724
2024 05 13 06:00     -1.00000  120.02922  -30.02922  344.53620
2024 05 13 07:00     -1.00000  121.46997  -31.46997    1.01218
2024 05 13 08:00     -1.00000  119.61490  -29.61490   17.39595
2024 05 13 09:00     -1.00000  114.75189  -24.75189   32.43191
2024 05 13 10:00     -1.00000  107.50315  -17.50315   45.55953
2024 05 13 11:00     -1.00000   98.53467   -8.53467   56.89466
2024 05 13 12:00     19.78551   88.39649    1.60351   66.89021
2024 05 13 13:00      4.50851   77.50242   12.49758   76.10463
2024 05 13 14:00      2.45990   66.17121   23.82879   85.15527
2024 05 13 15:00      1.72566   54.68818   35.31182   94.81862

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