On-orbit Calibration of a Multi-Spectral Satellite Sensor Using a High Altitude Airborne Imaging Spectrometer

A ncw approach to on-orbit satellite sensor calibration has becJl developed using the flight of a high altitude calibrated airborne imaging spectrometer below a multi-spectral satellite sensor. This strategy was in~plcrncnted on the 27th of August 1992 for the Optical Sensor (OPS) on board the Japanese Earth Rcsourccs Satellite-1 (JERS1 ) using NASA’s Airborne Visible-Infrared lmag,ing Spectrometer (AVIRIS). Calibrated AVIRIS spectral radiance data were acquired beneath OPS. OPS has eight spectral filters and eight detector arrays with 4096 C] CnlellL$ to measure each of eight spectral bands in the solar rcflcctcd spectrum across a 75 km ground swa[h. AVIRIS calibrated data were spectrally convolvcci and spatially registered to the OPS data in the ovcrlappin: image area measured by the two sensors. -llc convolved and rcgistcrcd AVIRIS radiance data were used to dctcrminc the 32,768 on-orbit radiomctric calibration coefficients required for calibration of the full 75 km swath and eight spectral bands of OPS.