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Title: Global navigation satellite sounding of the atmosphere and GNSS altimetry : prospects for geosciences
Authors: Yunck, Tom P.
Hajj, George A.
Keywords: Global Positioning System (GPS)
limb sounding
Global Navigation Satellite System (GNSS)
climate change
numerical weather prediction (NWP)
Issue Date: 8-Jul-2003
Publisher: Pasadena, CA : Jet Propulsion Laboratory, National Aeronautics and Space Administration, 2003.
Citation: IUGG General Assembly, Sapporo, Japan, July 8-11, 2003.
Abstract: The vast illuminating power of the Global Positioning System (GPS), which transformed space geodesy in the 199Os, is now serving to probe the earth’s fluid envelope in unique ways. Three distinct techniques have emerged: ground-based sensing of the integrated atmospheric moisture; space-based profiling of atmospheric refractivity, pressure, temperature, moisture, and other properties by active limb sounding; and surface (ocean and ice) altimetry and scatterometry with reflected signals detected from space. Ground-based GPS moisture sensing is already in provisional use for numerical weather prediction. Limb sounding, while less mature, offers a bevy of attractions, including high accuracy, stability, and vertical resolution; all-weather operation; and exceptionally low cost. GPS bistatic radar, r “reflectometry,” is the least advanced but shows promise for a number of niche applications.
Appears in Collections:JPL TRS 1992+

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