Title :
Error analysis for interferometric SAR measurements of ice sheet flow
Author :
Mohr, Johan J. ; Madsen, Søren N.
Author_Institution :
Center for Remote Sensing, Tech. Univ. Denmark, Lyngby, Denmark
Abstract :
This article concerns satellite interferometric radar measurements of ice elevation and three-dimensional flow vectors. It describes sensitivity to (1) atmospheric path length changes, and other phase distortions, (2) violations of the stationary flow assumption, and (3) unknown vertical velocities and slope errors in conjunction with a surface parallel flow assumption. The most surprising result is that assuming a stationary flow the east component of the three-dimensional flow derived from ascending and descending orbit data is independent of slope errors and of the vertical flow
Keywords :
error analysis; glaciology; hydrological techniques; remote sensing by radar; spaceborne radar; synthetic aperture radar; InSAR; ascending orbit; atmospheric path length change; descending orbit; error analysis; glaciology; ice elevation; ice sheet flow; interferometric SAR; measurement technique; phase distortion; radar remote sensing; satellite interferometric radar; slope error; spaceborne radar; stationary flow assumption; synthetic aperture radar; three-dimensional flow; unknown vertical velocities; Distortion measurement; Electromagnetic measurements; Error analysis; Extraterrestrial measurements; Fluid flow measurement; Ice; Length measurement; Remote sensing; Satellites; Velocity measurement;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1999. IGARSS '99 Proceedings. IEEE 1999 International
Conference_Location :
Hamburg
Print_ISBN :
0-7803-5207-6
DOI :
10.1109/IGARSS.1999.773413
