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| Keywords: Lp02-manual-v02.gif Kees van den Bos Hukseflux Thermal Sensors Pyranometer geometry type LP02 I uploaded this file from http //en wikipedia org/wiki/Image Lp02-manual-v02 gif where it had public license so I used the same license here on commons The solar radiation spectrum extends roughly from 300 to 2800 nm It follows that a pyranometer should cover that spectrum with a spectral sensitivity that is as flat as possible For a flux density or irradiance measurement it is required by definition that the response to beam radiation varies with the cosine of the angle of incidence; i e full response at when the solar radiation hits the sensor perpendicularly normal to the surface sun at zenith 0 degrees angle of incidence zero response when the sun is at the horizon 90 degrees angle of incidence 90 degrees zenith angle and 0 5 at 60 degrees angle of incidence It follows from the definition that a pyranometer should have a so-called directional response or cosine response that is close to the ideal cosine characteristic Uploaded by Piotr Flatau 2006-04-29 own assumed Pflatau Pyranometers Pflatau_meteo | ||||
