Improvement of the Sciamachy Radiometric Calibration and Its Validation on Solar Irradiances in the Spectral Range from 240 to 2380 Nm

SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY) is part of the payload of ESA’s Environmental Satellite ENVISAT which was launched into a sun-synchronous polar orbit on 2002-03-01. First in-flight validation results already showed inconsistencies of the radiometric calibration of SCIAMACHY. Hence the on-ground calibration was thoroughly revised and correction factors for an improved radiometric calibration of SCIAMACHY were derived. A Kurucz Spectrum and SOLSPEC/SOLSTICE/SUSIM data is compared with the solar irradiance measured by SCIAMACHY after application of these correction factors.