Abstract. The Imager for Mars Pathfinder returned over 16,000 high-quality images from the surface of Mars. The camera was well-calibrated in the laboratory, with <5% radiometric uncertainty. The photometric properties of two radiometric targets were also measured with 3% uncertainty. Several data sets acquired during the cruise and on Mars confirm that the system operated nominally throughout the course of the mission. Image calibration algorithms were developed for landed operations to correct instrumental sources of noise and to calibrate images relative to observations of the radiometric targets. The uncertainties associated with these algorithms as well as current improvements to image calibration are discussed. The primary requirement for mission success was that IMP provide a color panorama of the landing site. Other science goals included contour mapping of the local terrain, multispectral imaging of the surrounding rocks and soils to study local mineralogy, viewing of three windsocks, measuring atmospheric opacity and water vapor content, and estimating the magnetic properties of wind-blown dust.In this paper we review the baseline IMP performance, expanding on the prelanding experiment report [Smith et al., 1997]. We then discuss several experiments that were performed postlaunch that verify the nominal performance of the camera system. Finally, we describe the algorithms used to calibrate raw image data and review the differences between the level of calibration performed during operations versus more current and pending calibration algorithm. Note that this document is primarily intended to review IMP calibration and performance. The full IMP calibration report [Reid et al., 1998] will be archived with the raw data by the Planetary Data System (PDS).

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