## Solar Geometry Calculator

```Local UTC     SolarZen and Elev Uncorrected for Atmospheric Refaction
yyyy MM dd HH:mm
2024 09 12 12:00
2024 09 12 13:00
2024 09 12 14:00
2024 09 12 15:00
2024 09 12 16:00
2024 09 12 17:00
2024 09 12 18:00
2024 09 12 19:00
2024 09 12 20:00
2024 09 12 21:00
2024 09 12 22:00
2024 09 12 23:00
2024 09 13 00:00
2024 09 13 01:00
2024 09 13 02:00
2024 09 13 03:00
2024 09 13 04:00
2024 09 13 05:00
2024 09 13 06:00
2024 09 13 07:00
2024 09 13 08:00
2024 09 13 09:00
2024 09 13 10:00
2024 09 13 11:00
2024 09 13 12:00
```

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.