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 08 06:00     -1.00000  121.27378  -31.27378  344.17611
2024 05 08 07:00     -1.00000  122.75137  -32.75137    0.99599
2024 05 08 08:00     -1.00000  120.86423  -30.86423   17.72060
2024 05 08 09:00     -1.00000  115.91683  -25.91683   33.01704
2024 05 08 10:00     -1.00000  108.56312  -18.56312   46.31096
2024 05 08 11:00     -1.00000   99.49390   -9.49390   57.74858
2024 05 08 12:00     24.95745   89.27212    0.72788   67.81882
2024 05 08 13:00      4.80088   78.31752   11.68248   77.10749
2024 05 08 14:00      2.53736   66.95317   23.04683   86.25163
2024 05 08 15:00      1.75954   55.47133   34.52867   96.04265
2024 05 08 16:00      1.39366   44.22926   45.77074  107.70464
2024 05 08 17:00      1.20310   33.85008   56.14992  123.50663
2024 05 08 18:00      1.10934   25.72387   64.27613  147.56481
2024 05 08 19:00      1.08289   22.63646   67.36354  182.19015
2024 05 08 20:00      1.11636   26.46387   63.53613  215.87940
2024 05 08 21:00      1.21912   34.96006   55.03994  238.74001
2024 05 08 22:00      1.42416   45.48112   44.51888  253.89848
2024 05 08 23:00      1.81927   56.76489   33.23511  265.26336
2024 05 09 00:00      2.67654   68.23565   21.76435  274.93739
2024 05 09 01:00      5.32207   79.54988   10.45012  284.07189
2024 05 09 02:00     34.46897   90.41471   -0.41471  293.42982
2024 05 09 03:00     -1.00000  100.49798  -10.49798  303.63760
2024 05 09 04:00     -1.00000  109.36464  -19.36464  315.27071
2024 05 09 05:00     -1.00000  116.43535  -26.43535  328.78664
2024 05 09 06:00     -1.00000  121.01626  -31.01626  344.25662

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