R. K. Raney

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Knowledge of sea ice thickness is critical for the prediction of future climate, and for assessing the significance of changes in thickness. Sea ice thickness can be calculated from radar or laser satellite altimetry measurements of freeboard. However, a lack of knowledge of snow depth introduces significant uncertainties into these calculations. This paper(More)
The Magellan Venus orbiter carries only one scientific instrument: a 12.6-centimeter wavelength radar system shared among three data-taking modes. The synthetic-aperture mode images radar echoes from the Venus surface at a resolution of between 120 and 300 meters, depending on spacecraft altitude. In the altimetric mode, relative height measurement(More)
A synthetic aperture radar (SAR) in hybrid-polarity (CL) transmits circular polarization and receives on two orthogonal mutually-coherent linear polarizations. Recent work on compact polarimetry is reviewed in the context of the fifty-year history of polarimetric diversity. The CL technique is compared and contrasted to alternative compact polarimetric(More)
  • C J Leuschen, S P Gogineni, S M Clifford, R K Raney
  • 2001
Over the past few years, the interest in exploring Mars has grown, with several missions in the planning stages for the next decade. One motivating theme is the potential of discovering substantial sub-surface aqueous reservoirs. This paper outlines the simulation and development of a lightweight, low-power, ground-penetrating radar system intended for the(More)
The first treatment of the impulse response of a radar looking at a quasi-smooth horizontal surface from above, introducing the " beam-limited " and the " pulse-limited " waveforms and their associated radar power equation. The pulse-limited form since then has been the norm for orbital ocean-viewing altimeters. Beam-limited waveforms are " peaky " , in(More)
  • Christine Gommenginger, Cristina Martin-Puig, R K Raney
  • 2009
The launch of the ESA Cryosat-2 mission in March 2009 will be the first example of a Delay Doppler altimeter flown in space. With a tenfold increase in pulse repetition frequency, Delay-Doppler altimeters, also known as SAR altimeters, will be characterised by pulse-to-pulse coherence to enable Doppler cell selection within the radar antenna footprint. The(More)
  • R K Raney, H F Walter, Smith, R Keith Raney
  • 2003
ABYSS was a proposal in 2001-2002 to NASA by NOAA and the Johns Hopkins University Applied Physics Laboratory (JHU/APL) for an altimeter to be mounted on an instrument pallet at the International Space Station (ISS) [Smith, 2002]. The ISS orbit inclination (~51 o) and non-repeat coverage would have been nearly ideal for the ABYSS mission, which was to(More)