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LogoMISR abstract

Bruegge, Carol J., Wedad A. Abdou, David J. Diner, Barbara J. Gaitley, Mark C. Helmlinger, Ralph A. Kahn, and John V. Martonchik (2004). Validating the MISR radiometric scale for the ocean aerosol science communities. In Post-launch calibration of satellite sensors, Stanley A. Morain and Amelia M. Budge, editors. A.A. Balkema Publishers, Leiden, Netherlands, pp. 103-115.

The Multi-angle Imaging SpectroRadiometer (MISR) is one of five instruments on-board the EOS/ Terra spacecraft. Nine cameras, which view up to 70° forward and aft of the spacecraft track and enable unique geophysical retrievals, provide this multi-angle capability. As an example, many on-orbit sensors are
able to estimate the amount of aerosol loading present in the underlying atmosphere. MISR, however, is capable of retrieving information on both aerosol amount and microphysical properties. A necessary prerequisite, however, is that the instrument be calibrated to its absolute, band, and camera-relative specifications. Previous work has demonstrated that MISR is calibrated to better than 4% absolute uncertainty (1s confidence level) for bright land targets. This paper validates that radiometric accuracy is maintained throughout the dynamic range of the instrument. As part of this study, a new look has been taken at the band-relative scale, and a decrease in the radiance reported for the Red and NIR Bands has resulted. The calibration processes is now routine, fully developed, and tested. Bi-monthly on-orbit calibrations will be continued throughout the life of the mission and allow MISR to accurately report incident radiances, even in the presence of expected sensor response changes.

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Updated: 6-Jan-2005