Abstract: Certain aspects of the technology disclosed herein include measuring and reporting the unit planar area incident radiant flux striking multiple planes at known, determined angles of tilt from the horizontal and pre-determined angles of azimuthal orientation corresponding to that of an associated solar power generating apparatus which employs a single axis or two axis photovoltaic module tracking design.

Abstract: Certain aspects of the technology disclosed herein include measuring and reporting the unit planar area incident radiant flux striking multiple planes at known, determined angles of tilt from the horizontal and pre-determined angles of azimuthal orientation corresponding to that of an associated solar power generating apparatus which employs a single axis or two axis photovoltaic module tracking design.

Abstract: Systems and techniques are described herein for cleaning solar radiation sensors (e.g., radiometers). More specifically, various embodiments concern providing timed, recurring, and/or automatic cleaning of sensors by directing one or more streams of fluid (e.g., liquid and/or air) onto the outer surface of a sensor. For example, a mechanism can direct one or more streams of air onto the outer surface of the sensor to remove residual liquid and solid surface contaminants. Each stream of fluid can be applied in a steady, pulsed, or swirling manner. A cleaning system may include one or more delivery systems and one or more spray nozzle assemblies. The dispensing nozzle(s) in each spray nozzle assembly can be either fixed in their position relative to the corresponding sensor, or can be made to move during a cleaning operation to achieve optimal angles of fluid impingement upon the surface of the sensor.