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 23 09:00     -1.00000  112.84792  -22.84792   31.31633
2024 05 23 10:00     -1.00000  105.79807  -15.79807   44.17883
2024 05 23 11:00     -1.00000   97.01812   -7.01812   55.34835
2024 05 23 12:00     14.49072   87.03736    2.96264   65.21851
2024 05 23 13:00      4.12566   76.26024   13.73976   74.30128
2024 05 23 14:00      2.35291   64.99848   25.00152   83.17773
2024 05 23 15:00      1.67825   53.52540   36.47460   92.59117
2024 05 23 16:00      1.34736   42.15911   47.84089  103.73685
2024 05 23 17:00      1.17132   31.44963   58.55037  119.01181
2024 05 23 18:00      1.08366   22.73487   67.26513  143.57059
2024 05 23 19:00      1.05861   19.23244   70.76756  182.24440
2024 05 23 20:00      1.08958   23.46851   66.53149  219.70130
2024 05 23 21:00      1.18473   32.49755   57.50245  242.95837
2024 05 23 22:00      1.37252   43.31116   46.68884  257.62993
2024 05 23 23:00      1.72618   54.70043   35.29957  268.51856
2024 05 24 00:00      2.45833   66.15484   23.84516  277.83713
2024 05 24 01:00      4.46307   77.36620   12.63380  286.71047
2024 05 24 02:00     18.21214   88.05968    1.94032  295.85548
2024 05 24 03:00     -1.00000   97.91559   -7.91559  305.84260
2024 05 24 04:00     -1.00000  106.51727  -16.51727  317.17323
2024 05 24 05:00     -1.00000  113.32346  -23.32346  330.21402
2024 05 24 06:00     -1.00000  117.70754  -27.70754  344.97306
2024 05 24 07:00     -1.00000  119.12460  -29.12460    0.83299
2024 05 24 08:00     -1.00000  117.36740  -27.36740   16.62284
2024 05 24 09:00     -1.00000  112.69038  -22.69038   31.21000

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