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 09 23:00      1.81209   56.61498   33.38502  265.52204
2024 05 10 00:00      2.65941   68.08562   21.91438  275.16991
2024 05 10 01:00      5.24937   79.39249   10.60751  284.28577
2024 05 10 02:00     32.86078   90.24409   -0.24409  293.62923
2024 05 10 03:00     -1.00000  100.30906  -10.30906  303.82252
2024 05 10 04:00     -1.00000  109.15357  -19.15357  315.43519
2024 05 10 05:00     -1.00000  116.20103  -26.20103  328.91696
2024 05 10 06:00     -1.00000  120.76295  -30.76295  344.33285
2024 05 10 07:00     -1.00000  122.22373  -32.22373    1.01039
2024 05 10 08:00     -1.00000  120.34838  -30.34838   17.59324
2024 05 10 09:00     -1.00000  115.43464  -25.43464   32.78124
2024 05 10 10:00     -1.00000  108.12327  -18.12327   46.00604
2024 05 10 11:00     -1.00000   99.09475   -9.09475   57.40126
2024 05 10 12:00     22.59020   88.90668    1.09332   67.44086
2024 05 10 13:00      4.67402   77.97633   12.02367   76.69939
2024 05 10 14:00      2.50421   66.62499   23.37501   85.80594
2024 05 10 15:00      1.74510   55.14209   34.85791   95.54614
2024 05 10 16:00      1.38549   43.87940   46.12060  107.14354
2024 05 10 17:00      1.19755   33.45091   56.54909  122.89505
2024 05 10 18:00      1.10495   25.24518   64.75482  147.07391
2024 05 10 19:00      1.07885   22.11475   67.88525  182.27854
2024 05 10 20:00      1.11205   26.01240   63.98760  216.47381
2024 05 10 21:00      1.21373   34.59390   55.40610  239.39218
2024 05 10 22:00      1.41624   45.16370   44.83630  254.48046
2024 05 10 23:00      1.80506   56.46671   33.53329  265.77520

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