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).
The file is in comma-separated values format.

The file has three columns:
1- Timestamp in UTC in the format yyyy-mm-dd HH:MM:SS
2- GHI measurement in W/m²
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.
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/].
The primary pyranometer provides continuous measurement of GHI, while the secondary pyranometer and shadowband enable measurement of the diffuse horizontal irradiance (DHI).
DNI is computed directly from the GHI, DHI, and solar zenith angle (\(\theta_z\)).