Physics
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agusm.p51a..06c&link_type=abstract
American Geophysical Union, Spring Meeting 2004, abstract #P51A-06
Physics
0669 Scattering And Diffraction, 0689 Wave Propagation (4275), 0933 Remote Sensing, 5464 Remote Sensing, 6974 Signal Processing
Scientific paper
On August 29th, 2003, the Mars Odyssey UHF beacon and its specular reflection off the Vastitas Borealis surface of Mars was detected with the SRI/Stanford 46-m dish antenna. The specular reflection at Doppler compensated frequencies near 437.1 MHz had an SNR of 6 dB/Hz, and the specular point traversed an arc from Martian latitudes and longitudes starting at [58,280], up to [68,272], and ending at [53,326]. Although weak, the signal incurred an abrupt transition in intensity and bandwidth near [66,300], which interestingly is where the Odyssey GRS H2 maps indicate the H2 concentration itself transitions from high to low. Because the UHF signal's wavelength is 0.686 m, the specular reflection's ability to sense subsurface conditions, particularly the regularity and depth of the scattering interface, may be evident in the intensity and bandwidth profile of the reflection.
Callas John L.
Cousins M. D.
Gunnarsdottir Hrefna M.
Linscott Ivan R.
Tyler Leonard G.
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