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RAD.CATS DATA ARE CURRENTLYUSED BY RSG TO SUPPLEMENT THOSE COLLECTED BY ON-SITE PERSONNEL. FOR EXAMPLE  RECENTCOMPARISONS BETWEEN THE RADCATS RESULTS AND THOSE OBTAINED WITH LANDSAT 7 ENHANCED THEMATICMAPPER PLUS (ETM+ )  LANDSAT 8 OPERATIONAL LAND IMAGER (OLI)  AND TERRA MODERATE RESOLUTIONIMAGING SPECTROMETER (MODIS) SHOW THAT THE AVERAGE PERCENT DIFFERENCE BETWEEN THE SIX BANDSOF ETM+ AND RADCATS IS 1.1%. THE SEVEN MULTISPECTRAL BANDS OF OU SHOW AN AVERAGE PERCENTDIFFERENCE OF 0.1% WITH RADCATS  AND THE SEVEN LAND BANDS OF TERRA MODIS SHOW AN AVERAGEPERCENT DIFFERENCE OF 1.1% WITH RADCATS.IN 2011  THREE IMPROVED GROUND-VIEWING RADIOMETERS (GVRS) WERE BUILT AND DEPLOYED TO SUPPORT RADCATS. A FOURTH GVR WAS FUNDED  AND IT WAS DEPLOYED IN OCTOBER 2014. THE GVRS ARE FILTERBASED RADIOMETERS WITH EIGHT SPECTRAL CHANNELS COVERING A WAVELENGTH RANGE OF 400-1550 NM.THEY ARE AUTOMATED  TEMPERATURE-CONTROLLED  FIELD-DEPLOYABLE INSTRUMENTS THAT ARE CAPABLE OFLONG-TERM  STANDALONE OPERATION.IN 2014  RESEARCH INVOLVING THE RADCATS GVR CALIBRATION METHODOLOGY RESULTED IN THE CONCEPTUAL MODEL OF A SMALL AND ULTRA-PORTABLE FIELD TRANSFER RADIOMETER (TR). THE GVR TR CONCEPT WAS CREATED TO REPLACE THE SOLAR-RADIATION-BASED CALIBRATION (SRBC) AS A MEANS OF THE ON-SITECALIBRATION EVALUATION OF THE RADCATS GVRS. PRELIMINARY DESIGN WORK SHOWS THAT THE GVR TR IS AGOOD OPTION NOT ONLY FOR ON-SITE CALIBRATION  BUT ALSO AS A MEANS OF A CALIBRATION TRANSFER BOTH INTHE FIELD AND IN THE LABORATORY. THE GVR TR TRAVELLING STANDARD CONCEPT LED RSG TO PROPOSE WORKTHAT IS BENEFICIAL TO NASA'S INTEREST IN AUTOMATED VICARIOUS CALIBRATION  INCLUDING THE CEOSRADIOMETRIC CALIBRATION NETWORK (RADCAINET) CONCEPT.","funder_award_id":"NNX15AM86G","funder_id":"https://openalex.org/F4320306101","funder_display_name":"National Aeronautics and Space Administration"}],"funders":[{"id":"https://openalex.org/F4320306101","display_name":"National Aeronautics and Space Administration","ror":"https://ror.org/027ka1x80"},{"id":"https://openalex.org/F4320318240","display_name":"European Space Agency","ror":"https://ror.org/03wd9za21"},{"id":"https://openalex.org/F4320321133","display_name":"Chinese Academy of Sciences","ror":"https://ror.org/034t30j35"},{"id":"https://openalex.org/F4320332183","display_name":"U.S. Geological Survey","ror":"https://ror.org/035a68863"},{"id":"https://openalex.org/F4320338394","display_name":"European Metrology Programme for Innovation and 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