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Radar detection of PhobosRadar echoes from the martian satellite Phobos provide information about that object's surface properties at scales near the 3.5-cm observing wavelength. Phobos appears less rough than the moon at centimeter-to-decimeter scales. The uppermost few decimeters of the satellite's regolith have a mean bulk density within 20 percent of 2.0 g/cu cm. The radar signature of Phobos (albedo, polarization ratio, and echo spectral shape) differs from signatures measured for small, earth-approaching objects, but resembles those of large (greater than 100-km), C-class, mainbelt asteroids.
Document ID
19890047154
Document Type
Reprint (Version printed in journal)
Authors
Ostro, S. J. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Jurgens, R. F. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Yeomans, D. K. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Standish, E. M. (Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Greiner, W. (California Institute of Technology Jet Propulsion Laboratory, Pasadena, United States)
Date Acquired
August 14, 2013
Publication Date
March 24, 1989
Publication Information
Publication: Science
Volume: 243
ISSN: 0036-8075
Subject Category
LUNAR AND PLANETARY EXPLORATION
Distribution Limits
Public
Copyright
Other