Topographic/photometric model of small bodies

Marc I. Pomerantz; Luisa DeAntonio; Cheng-Chih Chu

doi:10.1117/12.211506

12 June 1995 Topographic/photometric model of small bodies

Marc I. Pomerantz, Luisa DeAntonio, Cheng-Chih Chu

Proceedings Volume 2466, Space Guidance, Control, and Tracking II; (1995) https://doi.org/10.1117/12.211506
Event: SPIE's 1995 Symposium on OE/Aerospace Sensing and Dual Use Photonics, 1995, Orlando, FL, United States

Abstract

Developing image acquisition requirements is a major part of the Autonomous Feature and Star Tracking (AFAST) project's work in advancing sensor technologies for planetary exploration. Sensing and detecting desired planetary features also involve topographic and photometric characterization of celestial bodies. The photometric study can provide felicitous designs of optics, focal plane array, and processing pertaining to feature extraction and tracking. In this paper, we present the results based on our preliminary study and implementation of photometric modeling on the AFAST's SGI-based 3D graphics testbed. Specifically, a computer-generated topographical model of Phobos is used since the photometry of Phobos have been studied in great details. The photometric function derived is mapped onto the computer-generated topographic model. Using the photometric model and specific camera parameters, an accurate CCD pixel response to target irradiance can then be calculated. This pixel information can be used by the feature tracking algorithm, and sensitivity to signal-to-noise ratio can then be determined.

Citation Download Citation

Marc I. Pomerantz, Luisa DeAntonio, and Cheng-Chih Chu "Topographic/photometric model of small bodies", Proc. SPIE 2466, Space Guidance, Control, and Tracking II, (12 June 1995); https://doi.org/10.1117/12.211506

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