Table 1-1. Solar Radiation
and Meteorological Elements in the NSRDB
Global horizontal radiation in Wh/m2 | Atmospheric pressure in millibars |
| Direct normal radiation in Wh/m2 | Wind direction in increments of 10 degrees |
| Diffuse horizontal radiation in Wh/m2 | Wind speed in m/s |
| Extraterrestrial radiation (ETR) in Wh/m2 | Horizontal visibility in km |
| Direct normal ETR in Wh/m2 | Ceiling height in decameters |
| Total sky cover in tenths | Present weather |
| Opaque sky cover in tenths | Total precipitable water in mm |
| Dry-bulb temperature in oC | Aerosol optical depth |
| Dew-point temperature in oC | Snow depth in cm |
| Relative humidity in percent | Number of days since last snowfall |