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Shape of IoAn approach for measuring the triaxial shape of Io from Voyager images is described. Triaxial shape of a satellite is detrmined by comparing the theoretical shape and location of the body's limb and terminator curves with the actual curves observed in the two dimensional images. Limb or terminator points are found by matching a model for the limb profile with the actual appearance of the limb in the digital data. The theoretical model for the limb model depends on the viewing and illumination geometry, the satellite reflection characteristics and the camera 'point spread function'. The method is applied to imaging data taken of Io in the last 25 hours befor Voyager 1's closet approach to the satellite.
Document ID
19850015361
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Synnott, S. P. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Reidel, J. E. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Callahan, J. C. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Donegan, A. J. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 12, 2013
Publication Date
April 1, 1985
Publication Information
Publication: NASA, Washington Repts. of Planetary Geol. and Geophys. Program, 1984
Subject Category
Lunar And Planetary Exploration
Accession Number
85N23672
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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IDRelationTitle19850015163Collected WorksReports of Planetary Geology and Geophysics Program - 1984
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