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 11 13 06:00     -1.00000  156.04246  -66.04246  333.28731
2025 11 13 07:00     -1.00000  157.78187  -67.78187    9.92740
2025 11 13 08:00     -1.00000  152.64118  -62.64118   42.15654
2025 11 13 09:00     -1.00000  143.47602  -53.47602   63.07466
2025 11 13 10:00     -1.00000  132.68055  -42.68055   77.12609
2025 11 13 11:00     -1.00000  121.30744  -31.30744   87.93783
2025 11 13 12:00     -1.00000  109.85026  -19.85026   97.36586
2025 11 13 13:00     -1.00000   98.62624   -8.62624  106.44525
2025 11 13 14:00     17.64639   87.92717    2.07283  115.88869
2025 11 13 15:00      4.71887   78.09905   11.90095  126.29829
2025 11 13 16:00      2.84383   69.60001   20.39999  138.22084
2025 11 13 17:00      2.19463   63.03014   26.96986  152.04458
2025 11 13 18:00      1.93917   59.07495   30.92505  167.70383
2025 11 13 19:00      1.89629   58.28875   31.71125  184.37119
2025 11 13 20:00      2.04163   60.79811   29.20189  200.65575
2025 11 13 21:00      2.46452   66.21939   23.78061  215.39180
2025 11 13 22:00      3.55220   73.89217   16.10783  228.17471
2025 11 13 23:00      7.76489   83.16062    6.83938  239.22432
2025 11 14 00:00     -1.00000   93.50051   -3.50051  249.03604
2025 11 14 01:00     -1.00000  104.51999  -14.51999  258.18553
2025 11 14 02:00     -1.00000  115.91135  -25.91135  267.31436
2025 11 14 03:00     -1.00000  127.38458  -37.38458  277.26053
2025 11 14 04:00     -1.00000  138.56263  -48.56263  289.39520
2025 11 14 05:00     -1.00000  148.74142  -58.74142  306.37914
2025 11 14 06:00     -1.00000  156.27320  -66.27320  332.96980

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