New improved algorithm for sky calibration of L-band radiometers JLBARA and ELBARA II

Marin Dimitrov, K. G. Kostov, François Jonard, Khan Jadoon, Mike Schwank, Lutz Weihermüller, Normen Hermes, Jan P. Vanderborght, Harry Vereecken

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

We propose a new algorithm for sky calibration of the L-band radiometers JLBARA and ELBARA II, introducing the effective transmissivities of the instruments. The suggested approach was tested using experimental data obtained at the Selhausen test site, Germany. It was shown that for JLBARA the effective transmissivities depend strongly on the air temperature and decrease with increasing air temperature, while for ELBARA II such strong dependence was not observed. It was also shown that the effective transmissivities account for the antenna and feed cable loss effects, and for the variations of the radiometer gain due to air temperature changes. The new calibration algorithm reduces significantly the bias of brightness temperature estimates for both radiometers, especially for JLBARA. © 2012 IEEE.
Original languageEnglish (US)
Title of host publication2012 12th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
ISBN (Print)9781467314701
DOIs
StatePublished - Mar 2012

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