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
2025 03 27 12:00     -1.00000  100.57688  -10.57688   77.19005
2025 03 27 13:00     24.43300   89.19528    0.80472   86.98937
2025 03 27 14:00      4.57996   77.71121   12.28879   96.69553
2025 03 27 15:00      2.48852   66.46626   23.53374  107.12730
2025 03 27 16:00      1.77862   55.89612   34.10388  119.28781
2025 03 27 17:00      1.45532   46.68046   43.31954  134.49512
2025 03 27 18:00      1.30257   39.92640   50.07360  154.09731
2025 03 27 19:00      1.25254   37.09762   52.90238  177.84630
2025 03 27 20:00      1.28696   39.08575   50.91425  202.03801
2025 03 27 21:00      1.41816   45.24107   44.75893  222.49486
2025 03 27 22:00      1.70146   54.10487   35.89513  238.41208
2025 03 27 23:00      2.30902   64.48268   25.51732  251.02326
2025 03 28 00:00      3.95541   75.62999   14.37001  261.69799
2025 03 28 01:00     14.61615   87.07880    2.92120  271.49090
2025 03 28 02:00     -1.00000   98.47735   -8.47735  281.24157
2025 03 28 03:00     -1.00000  109.47666  -19.47666  291.74406
2025 03 28 04:00     -1.00000  119.62740  -29.62740  303.88793
2025 03 28 05:00     -1.00000  128.26059  -38.26059  318.69297
2025 03 28 06:00     -1.00000  134.39028  -44.39028  336.95868
2025 03 28 07:00     -1.00000  136.86804  -46.86804  358.15540
2025 03 28 08:00     -1.00000  135.06295  -45.06295   19.61951
2025 03 28 09:00     -1.00000  129.44453  -39.44453   38.44608
2025 03 28 10:00     -1.00000  121.13521  -31.13521   53.76571
2025 03 28 11:00     -1.00000  111.16907  -21.16907   66.25704
2025 03 28 12:00     -1.00000  100.26122  -10.26122   76.94394

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