OF ASPECTS ASSOCIATED WITH THE CHRIS CALIBRATION

Following almost two years of CHRIS in-orbit operations, this paper reviews the procedure for calibration of the CHRIS instrument to assess whether changes could be implemented to improve the radiometric calibration. In particular the paper addresses: first, the variation of the dark signal data acquired over the period of the mission, from October 2001 to March 2004, secondly, the use of the generic dark-field data sets for correcting analogue electronic offsets and, thirdly, the influence of the platform temperature variations on instrument response and hence radiometric calibration.