Results 121 to 130 of about 1,060 (148)
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Radar altimetry of South Tharsis, Mars
Icarus, 1980The paper discusses Martian altitudes measured by radar during the oppositions of 1971 and 1973 using the 64-m antenna at Goldstone, Calif. The resultant topographic profiles substantiate a zonal classification of the volanic flows blanketing the south flanks of Arsia Mons, and they confirm the existence of a secondary, parasitic shield, attached from ...
L.E. Roth +3 more
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Multibeam radar altimetry: spaceborne feasibility
IEEE Transactions on Geoscience and Remote Sensing, 1991An analysis of the inherent height and spatial resolution of an off-nadir radar altimeter is presented. For the general case, mean-square height uncertainty is shown to be proportional to the cross-track beamwidth divided by the along-track beamwidth. Thus, the cross-track beamwidth should be minimized and the along-track beamwidth maximized, subject ...
L.S. Miller, G.S. Brown, L.W. Choy
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Radar altimetry of large Martian craters
Icarus, 1989A total of 108 13-cm wavelength scans conducted for the 23 to -22 deg latitude regions of Mars during the 1971-1982 oppositions are of sufficiently high resolution to allow elevation differences of as much as 3 km over less than 10 deg longitude to be observed; most of this local relief is furnished by structural elements of impact craters.
L.E. Roth +3 more
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Open Source Visualization for Radar Altimetry Waveforms
2021 IEEE 19th International Symposium on Antenna Technology and Applied Electromagnetics (ANTEM), 2021Radar altimetry is a valuable tool for monitoring topographic changes in Earth’s polar regions. An important part of these altimetry data sets is the waveforms that are received and recorded by the radar. These waveforms are processed to create surface-height data products, but also contain information about the scattering surface and near-subsurface ...
Jared Klemm, Matthew Siegfried
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Airborne Lidar Altimetry in support of Radar Altimetry
2016In a series of experiments between 2011 and 2016, in the Gulf of Mexico and off the coast of California, directional wave field and the sea surface height anomaly (SSHA) measurements were collected by the Scripps Modular Aerial Sensing System (MASS) waveform scanning lidar.
Melville, Ken, Lenain, Luc
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Radar Altimetry and Acoustic Prediction
1991An evaluation of the PARQUES acoustic propagation model to take into account the oceanic mesoscale variability as observed during the ATHENA experiment and an assessment of the GEOSAT altimeter for observing this variability and predict acoustic propagation are presented. The ATHENA experiment took place in summer 1988 in the north East Atlantic around
Christophe Boissier, Hubert Bouxin
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Slope correction for ocean radar altimetry
Journal of Geodesy, 2014We develop a slope correction model to improve the accuracy of mean sea surface topography models as well as marine gravity models. The correction is greatest above ocean trenches and large seamounts where the slope of the geoid exceeds 100 $$\upmu $$
David T. Sandwell, Walter H. F. Smith
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Advanced processing of altimetry Cassini radar data
2011 MICROWAVES, RADAR AND REMOTE SENSING SYMPOSIUM, 2011The Cassini RADAR is a Ku band multimode instrument capable of providing topography information of Titan's surface when operating in altimetry mode. During the last six years (January 2005 to 2011) Cassini has performed 71 Titan's fly-bys and several observations have been collected in Altimetry mode.
M. Mastrogiuseppe +3 more
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Measurements of electromagnetic bias in radar altimetry
Journal of Geophysical Research: Oceans, 1991The accuracy of satellite altimetric measurements of sea level is limited in part by the influence of ocean waves on the altimeter signal reflected from the sea surface. The difference between the mean reflecting surface and mean sea level is the electromagnetic bias.
W. K. Melville +7 more
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Radar Altimetry for Land Applications
1989An international programme for polar earth observations will be established by NASA /ESA/NASDA, starting in 1995. Among many other instruments, the first NASA mission (EOS-1) will possibly incorporate a sensor system for measuring global land topography.
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