Details
Eppley Model PyranometerMeasures global radiation (direct solar radiation and diffuse solar radiation) using a wirewound plated thermopile. The PSP has a black sensor protected by two precision ground, polished hemispheres. The wavelength range is 0.285-2.8 µm. The direct solar radiation has to be attitude corrected.
Eppley Model PIR PyrgeometerMeasures global incoming or outgoing longwave terrestrial radiation using a wirewound plated thermopile. The wavelength range is 3.5-50 µm. The dome temperature and body temperature are recorded and used to correct the measured raw ir radiation.
DLR Model PIR PyrgeometerModified Eppley Pyrgeometer, measures global incoming or outgoing longwave terrestrial radiation using a coated film thermopile. The wavelength range is 3.5-50 µm. The dome temperature and body temperature are recorded and used to correct the measured raw ir radiation.
Error Analysis
The accuracy of the Eppley Pyranometer is typically less than 5 W/m2 under clear sky conditions and constant level flight. The accuracy of the Eppley and DLR Pyrgeometer is typically less than 10-15 W/m2 at constant level flight. All Pyrano- and Pyrgeometers are regularly calibrated at the German Weather Service (DWD).