## Solar Geometry Calculator

```Local Etc/GMT
yyyy MM dd HH mm ss
2021 11 29 08 00 00
2021 11 29 09 00 00
2021 11 29 10 00 00
2021 11 29 11 00 00
2021 11 29 12 00 00
2021 11 29 13 00 00
2021 11 29 14 00 00
2021 11 29 15 00 00
2021 11 29 16 00 00
2021 11 29 17 00 00
2021 11 29 18 00 00
2021 11 29 19 00 00
2021 11 29 20 00 00
2021 11 29 21 00 00
2021 11 29 22 00 00
2021 11 29 23 00 00
2021 11 30 00 00 00
2021 11 30 01 00 00
2021 11 30 02 00 00
2021 11 30 03 00 00
2021 11 30 04 00 00
2021 11 30 05 00 00
2021 11 30 06 00 00
2021 11 30 07 00 00
2021 11 30 08 00 00
```

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.