CALIBRATION STATUS OF THE AATSR REFLECTANCE CHANNELS

• Main Authors: D. L. Smith, C. A. Poulsen
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: The Sentinel; Antarc*; Antarctica
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.226.6208; http://earth.esa.int/pub/ESA_DOC/meris_workshop_2008/papers%20/o05_smit.pdf

The radiometric gains of the AATSR visible to shortwave-infrared channels are calibrated using an on-board solar diffuser. The on-board calibration is supported by vicarious techniques such as comparisons over stable desert targets to establish relative biases in the radiometric calibrations of AATSR and other optical sensors and also to determine the long-term drifts. The authors present the results of comparisons over the Dome-C site in Antarctica, analysis of dark water measurements and multi-platform inter-comparisons. The data and the lessons learned from the calibration monitoring are being fed into the Sentinel-3 calibration planning. 1. AATSR Visible Calibration History Only 3 updates to AATSR visible calibration tables have been introduced into the L1b products since the launch of ENVISAT in 2002.