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 22 02:00     19.53036   88.34473    1.65527  295.60392
2024 05 22 03:00     -1.00000   98.22459   -8.22459  305.61986
2024 05 22 04:00     -1.00000  106.85292  -16.85292  316.98912
2024 05 22 05:00     -1.00000  113.68391  -23.68391  330.08744
2024 05 22 06:00     -1.00000  118.08365  -28.08365  344.92800
2024 05 22 07:00     -1.00000  119.49955  -29.49955    0.88553
2024 05 22 08:00     -1.00000  117.72213  -27.72213   16.76768
2024 05 22 09:00     -1.00000  113.01158  -23.01158   31.42376
2024 05 22 10:00     -1.00000  105.94267  -15.94267   44.30857
2024 05 22 11:00     -1.00000   97.14484   -7.14484   55.49204
2024 05 22 12:00     14.83340   87.14915    2.85085   65.37300
2024 05 22 13:00      4.15420   76.36079   13.63921   74.46756
2024 05 22 14:00      2.36108   65.09210   24.90790   83.36016
2024 05 22 15:00      1.68188   53.61745   36.38255   92.79750
2024 05 22 16:00      1.34945   42.25729   47.74271  103.97825
2024 05 22 17:00      1.17278   31.56661   58.43339  119.29670
2024 05 22 18:00      1.08489   22.88937   67.11063  143.85188
2024 05 22 19:00      1.05983   19.42076   70.57924  182.28827
2024 05 22 20:00      1.09100   23.63924   66.36076  219.50054
2024 05 22 21:00      1.18662   32.64094   57.35906  242.73134
2024 05 22 22:00      1.37543   43.44013   46.55987  257.43043
2024 05 22 23:00      1.73146   54.82482   35.17518  268.34607
2024 05 23 00:00      2.47045   66.28088   23.71912  277.68514
2024 05 23 01:00      4.50708   77.49820   12.50180  286.57411
2024 05 23 02:00     18.84739   88.20092    1.79908  295.73253

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