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:

Local Etc/GMT
yyyy MM dd HH mm ss      AirMass   SolarZen       Elev       Azim
2017 09 21 11 00 00     -1.00000  110.89039  -20.89039   70.53065
2017 09 21 12 00 00     -1.00000   99.77147   -9.77147   80.99632
2017 09 21 13 00 00     19.46695   88.00633    1.99367   90.74412
2017 09 21 14 00 00      4.31987   76.85117   13.14883  100.58029
2017 09 21 15 00 00      2.43312   65.85273   24.14727  111.33505
2017 09 21 16 00 00      1.77078   55.69950   34.30050  124.01375
2017 09 21 17 00 00      1.46862   47.15295   42.84705  139.83878
2017 09 21 18 00 00      1.33099   41.35793   48.64207  159.74896
2017 09 21 19 00 00      1.29696   39.61476   50.38524  182.78881
2017 09 21 20 00 00      1.35376   42.44398   47.55602  205.32196
2017 09 21 21 00 00      1.52324   49.03737   40.96263  224.21384
2017 09 21 22 00 00      1.88615   58.07113   31.92887  239.15011
2017 09 21 23 00 00      2.71174   68.49723   21.50277  251.24274
2017 09 22 00 00 00      5.39884   79.62716   10.37284  261.67381
2017 09 22 01 00 00     -1.00000   91.18105   -1.18105  271.39343
2017 09 22 02 00 00     -1.00000  102.60258  -12.60258  281.21041
2017 09 22 03 00 00     -1.00000  113.61966  -23.61966  291.94949
2017 09 22 04 00 00     -1.00000  123.75284  -33.75284  304.59945
2017 09 22 05 00 00     -1.00000  132.25869  -42.25869  320.34508
2017 09 22 06 00 00     -1.00000  138.01416  -48.01416  340.06955
2017 09 22 07 00 00     -1.00000  139.75489  -49.75489    2.82151
2017 09 22 08 00 00     -1.00000  136.97548  -46.97548   25.10282
2017 09 22 09 00 00     -1.00000  130.45436  -40.45436   43.87592
2017 09 22 10 00 00     -1.00000  121.48308  -31.48308   58.78903
2017 09 22 11 00 00     -1.00000  111.09526  -21.09526   70.89718

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