PHOBOS and Deimos control networks

Details PHOBOS and Deimos control networks PHOBOS and Deimos control networks

Feb 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989icar...77..275d&link_type=abstract

Icarus (ISSN 0019-1035), vol. 77, Feb. 1989, pt. 1, p. 275-286.

Astronomy and Astrophysics

Astronomy

35

Astronomical Photography, Deimos, Mars Satellites, Phobos, Photogrammetry, Viking Orbiter Spacecraft, Data Processing, Libration, Satellite Orbits, Mars, Satellites, Phobos, Deimos, Surface, Features, Viking Missions, Orbiters, Coordinates, Spacecraft Observations, Diagrams, Photographs, Parameters, Calculations, Data, Mapping

Scientific paper

Viking Orbiter images of Phobos and Deimos have been measured to establish global control networks for 98 surface features of the former and 53 of the latter; photogrammetric triangulation has yielded body-fixed coordinates of these control-points, as well as mean triaxial radii of 13.3 x 11.1 x 9.3 km for Phobos and 7.5 x 6.2 x 5.4 for Deimos. Expressions are also obtained for the inertial orientations of these bodies' spin axes and prime meridians. While these expressions should be accurate to a few tenths of a deg for the 1971-1980 period, their accuracy will degrade with time as the orbit accuracy degrades.

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