Required headers (must all be present):
- Temperature
- Alpha
- Aerosol Optical Depth
- Asymmetry
- Clearsky DHI
- Clearsky DNI
- Clearsky GHI
- Cloud Fill Flag
- Cloud Type
- Dew Point
- DHI
- DNI
- Fill Flag
- GHI
- Ozone
- Relative Humidity
- Solar Zenith Angle
- SSA
- Surface Albedo
- Pressure
- Precipitable Water
- Wind Direction
- Wind Speed