Solar Irradiance (GHI and DNI) for Folsom, CA (lat=38.642N, lon=121.148W)

Solar Irradiance (GHI and DNI) for Folsom, CA (lat=38.642N, lon=121.148W).<br> The file is in comma-separated values format. The file has three columns:<br> 1- Timestamp in UTC in the format yyyy-mm-dd HH:MM:SS<br> 2- GHI measurement in W/m²<br> 3- DNI measurement in W/m² The GHI and DNI data included in this data release are measured with a second-generation RSR (RSR-2) from Augustyn, Inc.<br> The RSR-2 consists of a main shadowband head unit and two Licor LI-200SZ pyranometers, which have a typical error of ±5% compared to an Eppley Precision Spectral Pyranometer (PSP)[https://www.licor.com/].<br> The primary pyranometer provides continuous measurement of GHI, while the secondary pyranometer and shadowband enable measurement of the diffuse horizontal irradiance (DHI).<br> DNI is computed directly from the GHI, DHI, and solar zenith angle (\(\theta_z\)).