Imager for Mars Pathfinder (IMP) image calibration

The Imager for Mars Pathfinder returned over 16,000 high-quality images fro m the surface of Mars. The camera was well-calibrated in the laboratory, wi th <5% radiometric uncertainty. The photometric properties of two radiometr ic targets were also measured with 3% uncertainty. Several data sets acquir ed during the cruise and on Mars confirm that the system operated nominally throughout the course of the mission. Image calibration algorithms were de veloped for landed operations to correct instrumental sources of noise and to calibrate images relative to observations of the radiometric targets. Th e uncertainties associated with these algorithms as well as current improve ments to image calibration are discussed.