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TitlePotential for RADARSAT-2 interferometry: glacier monitoring using speckle tracking
AuthorShort, N HORCID logo; Gray, A L
SourceCanadian Journal of Remote Sensing 30, 3, 2004 p. 504-509,
Alt SeriesEarth Sciences Sector, Contribution Series 20043301
PublisherInforma UK Limited
Mediapaper; on-line; digital
File formatpdf
Subjectsgeophysics; environmental geology; remote sensing; radar imagery; glacier surveys; glaciers; ice movement; ice conditions; RADARSAT-1; RADARSAT-2
Released2014 06 02
AbstractSatellite radar interferometry using differential phase and speckle tracking has emerged as an effective tool for monitoring glacier surface motion. The 24-day repeat orbit of RADARSAT-1 has limited the application of both these techniques to glaciers at high latitudes where long periods of sub-zero temperatures preserve surface conditions and hence coherence. To date, speckle tracking has been particularly successful for velocity measurements of large, fast-flowing glaciers and ice streams. The left-looking mode used in the RADARSAT-1 Antarctic Mapping Mission enabled the first major acquisition of interferometric data and hence large scale velocity mapping of parts of Antarctica. RADARSAT-2 will build upon this success by having easily interchangeable left- and right-imaging modes, enabling complete views of both the Arctic and the Antarctic on a regular basis. The upcoming satellite will also have an ultra-fine resolution mode (~3 m) that will reduce the stringent baseline requirements for interferometry and will make the speckle tracking technique suitable for smaller and slower glaciers. Potentially, the high resolution mode could reduce the errors in the speckle tracking method to tens of centimetres; this would make the technique appropriate for monitoring other types of terrain displacement, e.g., seismic or volcanic activity, or even terrain subsidence or slope creep.

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