The LPPYRA11 albedometer measures the net global radiation, as well as the albedo of grounds (albedo is the ratio between diffuse radiation from a determined surface and the quantity of radiation that arrives on the surface).
The LPPYRA11 is manufactured mounting two LPPYRA10 pyranometers in one housing only. The upper pyranometer measures the incident radiation striking the ground [ ↓ ], while the lower pyranometer measures the reflected radiation [ ↑ ].
The output signals of the two pyranometers can be processed to get the desired physical quantity.
The LPPYRA11 can be used as a pyranometer for measuring global radiation. As a pyranometer, the LPPYRA11 is a Spectrally Flat Class A (Secondary Standard) pyranometer in accordance with ISO 9060:2018 and with the criteria of the WMO “Guide to Meteorological Instruments and Methods of Observation”.
The albedometer is supplied factory calibrated and with a calibration report. The calibration is carried out in accordance with the ISO 9847:1992 (type IIc) standard: ”Calibration of field pyranometers by comparison to a reference pyranometer”. The pyranometer is calibrated by comparison with the reference sample calibrated annually at WRC (World Radiation Center).