A Geostationary Earth Radiation Budget Dataset ForClimate Research: First Intercomparison Results BetweenData From the GERB-1 -2 Instruments

摘要

Initial results from a study comparing filtered radiance data from the first two Geostationary Earth Radiation Budget (GERB) instruments on board the METEOSAT-8 and -9 satellites are presented. The differences seen between longwave filtered radiances from GERB-1 and -2 are in line with those predicted when considering the known differences in the ground measured spectral responses between the two instruments. However, the filtered shortwave radiances are found to differ by several percent from those expected. It is possible that in-orbit calibration updates, which have yet to be determined for GERB-1, may explain the discrepancies between the observed and predicted differences.