Search Results - "Pettengill, G. H."

The Global Topography of Mars and Implications for Surface Evolution by Smith, David E., Zuber, Maria T., Solomon, Sean C., Phillips, Roger J., Head, James W., Garvin, James B., Banerdt, W. Bruce, Muhleman, Duane O., Pettengill, Gordon H., Neumann, Gregory A., Lemoine, Frank G., Abshire, James B., Aharonson, Oded, Brown, C. David, Hauck, Steven A., Ivanov, Anton B., McGovern, Patrick J., Zwally, H. Jay, Duxbury, Thomas C.

“…Elevations measured by the Mars Orbiter Laser Altimeter have yielded a high-accuracy global map of the topography of Mars. Dominant features include the low…”
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Topography of the Northern Hemisphere of Mars from the Mars Orbiter Laser Altimeter by Smith, D. E., Zuber, M. T., Frey, H. V., Garvin, J. B., Head, J. W., Muhleman, D. O., Pettengill, G. H., Phillips, R. J., Solomon, S. C., Zwally, H. J., Banerdt, W. B., Duxbury, T. C.

“…The first 18 tracks of laser altimeter data across the northern hemisphere of Mars from the Mars Global Surveyor spacecraft show that the planet at latitudes…”
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Magellan: Radar Performance and Data Products by Pettengill, Gordon H., Ford, Peter G., William T. K. Johnson, Raney, R. Keith, Soderblom, Laurence A.

“…The Magellan Venus orbiter carries only one scientific instrument: a 12.6-centimeter-wavelength radar systern shared among three data-taking modes. The…”
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Observations of the North Polar Region of Mars from the Mars Orbiter Laser Altimeter by Zuber, Maria T., Smith, David E., Solomon, Sean C., Abshire, James B., Afzal, Robert S., Aharonson, Oded, Fishbaugh, Kathryn, Ford, Peter G., Frey, Herbert V., Garvin, James B., Head, James W., Ivanov, Anton B., Johnson, Catherine L., Muhleman, Duane O., Neumann, Gregory A., Pettengill, Gordon H., Phillips, Roger J., Sun, Xiaoli, Zwally, H. Jay, Banerdt, W. Bruce, Duxbury, Thomas C.

“…Elevations from the Mars Orbiter Laser Altimeter (MOLA) have been used to construct a precise topographic map of the martian north polar region. The northern…”
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Venus: Global Surface Radar Reflectivity by Pettengill, G. H., Ford, P. G., Nozette, S.

“…Observations of the surface of Venus, carried out by the Pioneer Venus radar mapper at a wavelength of 17 centimeters, reveal a global mean reflectivity at…”
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Winter clouds over the North Martian Polar Cap by Pettengill, Gordon H., Ford, Peter G.

“…The Mars Orbiter Laser Altimeter (MOLA) experiment, carried on the Mars Global Surveyor spacecraft, has observed echoes from cloud tops on roughly 2.5% of the…”
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Physical Properties of the Planets and Satellites from Radar Observations by Pettengill, G. H

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Comet Encke: Radar Detection of Nucleus by Kamoun, P. G., Campbell, D. B., Ostro, S. J., Pettengill, G. H., Shapiro, I. I.

“…The nucleus of the periodic comet Encke was detected in November 1980 with the Arecibo Observatory's radar system (wavelength, 12.6 centimeters). The echoes in…”
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Venus: Global Surface Radio Emissivity by Ford, Peter G., Pettengill, Gordon H.

“…Observations of thermal radio emission from the surface of Venus, made by the Pioneer Venus radar mapper at a wavelength of 17 centimeters, show variations…”
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New Radar Image of Venus by Campbell, D. B., Dyce, R. B., Pettengill, G. H.

“…A new radar image of Venus covering the latitude range 46° to 75 ° and the approximate longitude range 290° to 10° is shown. The resolution is approximately 20…”
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Galilean Satellites of Jupiter: 12.6-Centimeter Radar Observations by Campbell, D. B., Chandler, J. F., Pettengill, G. H., Shapiro, I. I.

“…Observations of the Galilean satellites with the radar system at the Arecibo Observatory, Puerto Rico, show that their surfaces are highly diffuse scatterers…”
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Wind Velocities on Venus: Vector Determination by Radio Interferometry by Counselman, C. C., Gourevitch, S. A., King, R. W., Pettengill, G. H., Prinn, R. G., Shapiro, I. I., Miller, R. B., Smith, J. R., Ramos, R., Liebrecht, P.

“…To determine the wind directions and speeds on Venus, as each Pioneer probe fell to the surface we tracked its motion in three dimensions using a combination…”
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Electrical Properties of the Venus Surface from Bistatic Radar Observations by Pettengill, Gordon H., Ford, Peter G., Simpson, Richard A.

“…A bistatic radar experiment in 1994, involving reception on Earth of a specularly reflected, linearly polarized 13-centimeter-wavelength signal transmitted…”
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Pioneer Venus Radar Mapper Experiment by Pettengill, G. H., Ford, P. G., Brown, W. E., Kaula, W. M., Keller, C. H., Masursky, H., McGill, G. E.

“…Altimetry and radar scattering data for Venus, obtained from 10 of the first 13 orbits of the Pioneer Venus orbiter, have disclosed what appears to be a rift…”
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Martian Craters and a Scarp as Seen by Radar by Pettengill, G. H., Rogers, A. E. E., Shapiro, I. I.

“…Radar observations of Mars with a surface resolution of 1.3 ° in latitude and 0.8 ° in longitude have been carried out during the opposition of 1971. With a…”
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Venus: Topography Revealed by Radar Data by Campbell, D. B., Dyce, R. B., Ingalls, R. P., Pettengill, G. H., Shapiro, I. I.

“…Surface height variations over the entire equatorial region on Venus have been estimated from extended series of measurements of interplanetary radar echo…”
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Pioneer Venus Orbiter Radar Mapper: Design And Operation by Pettengill, G. H., Horwood, D. F., Keller, C. H.

“…The Radar Mapper Experiment, carried abroad the Pioneer Venus Orbiter spacecraft, is designed to obtain a near-global picture of the topography, meter-scale…”
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Radar Interferometric Observations of Venus at 70-Centimeter Wavelength by Campbell, D. B., Jurgens, R. F., Dyce, R. B., Harris, F. S., Pettengill, G. H.

“…A radar interferometer was used to map unambiguously the surface reflectivity of Venus in the polarized mode at a wavelength of 70 centimeters. The observed…”
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The Case for the Radar Radius of Venus by Ash, M. E., Campbell, D. B., Dyce, R. B., Ingalls, R. P., Jurgens, R., Pettengill, G. H., Shapiro, I. I., Slade, M. A., Thompson, T. W.

“…The Venus radius of 6085 ± 10 kilometers, deduced from combining observations made with the Venera 4 and Mariner V space probes is incompatible with the value…”
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Magellan: Mission Summary by Saunders, R. Stephen, Pettengill, Gordon H.

“…The Magellan radar mapping mission is in the process of producing a global, high-resolution image and altimetry data set of Venus. Despite initial…”
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