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 04 25 16:00      1.46474   47.02881   42.97119  111.42372
2024 04 25 17:00      1.25086   36.99528   53.00472  127.36359
2024 04 25 18:00      1.14663   29.36373   60.63627  150.31668
2024 04 25 19:00      1.11639   26.46606   63.53394  181.17571
2024 04 25 20:00      1.15112   29.76032   60.23968  211.65015
2024 04 25 21:00      1.26119   37.61600   52.38400  234.03227
2024 04 25 22:00      1.48470   47.74565   42.25435  249.62057
2024 04 25 23:00      1.92699   58.85578   31.14422  261.45275
2024 04 26 00:00      2.93918   70.30417   19.69583  271.47722
2024 04 26 01:00      6.56263   81.70823    8.29177  280.85506
2024 04 26 02:00     -1.00000   92.75644   -2.75644  290.39061
2024 04 26 03:00     -1.00000  103.10696  -13.10696  300.76833
2024 04 26 04:00     -1.00000  112.31116  -22.31116  312.65091
2024 04 26 05:00     -1.00000  119.75316  -29.75316  326.62086
2024 04 26 06:00     -1.00000  124.65951  -34.65951  342.86593
2024 04 26 07:00     -1.00000  126.29882  -36.29882    0.67395
2024 04 26 08:00     -1.00000  124.37221  -34.37221   18.40593
2024 04 26 09:00     -1.00000  119.22721  -29.22721   34.47283
2024 04 26 10:00     -1.00000  111.61172  -21.61172   48.24941
2024 04 26 11:00     -1.00000  102.29000  -12.29000   59.97364
2024 04 26 12:00     -1.00000   91.86241   -1.86241   70.24108
2024 04 26 13:00      5.95773   80.76522    9.23478   79.71387
2024 04 26 14:00      2.80937   69.33310   20.66690   89.07801
2024 04 26 15:00      1.87466   57.87587   32.12413   99.15175
2024 04 26 16:00      1.45807   46.78278   43.21722  111.13744

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