Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994cemda..60..431p&link_type=abstract
Celestial Mechanics and Dynamical Astronomy (ISSN 0923-2958), vol. 60, no. 4, p. 431-454
Astronomy and Astrophysics
Astronomy
Conical Scanning, Frequency Scanning, Imaging Techniques, Photomapping, Satellite Imagery, Satellite Orbits, Swath Width, Galileo Project, Image Resolution, Satellite Instruments, Satellite Observation
Scientific paper
An exact analysis of the coverage obtained by spacecraft using cross-track scanning and nadir-centered conical imaging, under imposed viewing obliqueness and resolution requirements, is presented. In addition to exact expressions for the area acquired and the area acquisition rate, envelope theory is introduced to obtain the boundary of the imaged area. These expressions are relatively compact, allowing rapid machine computation. The effects of the sun phase angle, and of imaging system limitations are also examined. The Galileo mission encounter with Callisto is used as a numerical example, from which certain general conclusions are drawn regarding optimal imaging trajectories.
Longuski James M.
Petropoulos Anastassios E.
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