Penetration depth of interferometric synthetic-aperture radar signals in snow and
Abstract. Digital elevation models of glaciated terrain pro-duced by the NASA/Jet Propulsion Laboratory (JPL) air-borne interferometric synthetic-aperture radar (InSAR) in-strument in Greenland and Alaska at the C- (5.6 cm wave-length) and L-band (24-cm) frequencies were compared with surface elevat...
| Main Authors: | , , |
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| Format: | Text |
| Language: | English |
| Published: |
2001
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.469.99 http://www.ess.uci.edu/researchgrp/erignot/files/RignotetalGRL2001Penetration.pdf |
| Summary: | Abstract. Digital elevation models of glaciated terrain pro-duced by the NASA/Jet Propulsion Laboratory (JPL) air-borne interferometric synthetic-aperture radar (InSAR) in-strument in Greenland and Alaska at the C- (5.6 cm wave-length) and L-band (24-cm) frequencies were compared with surface elevation measured from airborne laser altimetry to estimate the phase center of the interferometric depth, or penetration depth, p. On cold polar rn at Greenland sum-mit, p = 92m at C- and 144m at L-band. On the ex-posed ice surface of Jakobshavn Isbrae, west Greenland, p = 12 m at C- and 33 m at L-band except on smooth, marginal ice where p = 155 m. On colder marginal ice of northeast Greenland, p reaches 60 to 120 m at L-band. On the temperate ice of Brady Glacier, Alaska, p is 42 m at C-and 126 m at L-band, with little dependence on snow/ice conditions. The implications of the results on the scientic use of InSAR data over snow/ice terrain is discussed. 1. |
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