Improving terrain height estimates from RADARSAT interferometric measurements

Author

Thompson, P.A. ; Eichel, P.H. ; Calloway, T.M.

Author_Institution

Sandia Nat. Labs., Albuquerque, NM, USA

Volume

4

fYear

1998

fDate

6-10 Jul 1998

Firstpage

1917

Abstract

The authors describe two methods of combining two-pass RADARSAT interferometric phase maps with existing DTED (digital terrain elevation data) to produce improved terrain height estimates. The first is a least-squares estimation procedure that fits the unwrapped phase data to a phase map computed from the DTED. The second is a filtering technique that combines the interferometric height map with the DTED map based on spatial frequency content. Both methods preserve the high fidelity of the interferometric data

Keywords

geophysical techniques; radar imaging; remote sensing by radar; spaceborne radar; synthetic aperture radar; topography (Earth); DTED; InSAR; RADARSAT; RADARSAT interferometric measurements; SAR; digital terrain elevation data; filtering technique; geophysical measurement technique; interferometric height map; interferometric phase map; land surface topography; least-squares estimation; phase map; radar remote sensing; spatial frequency content; synthetic aperture radar; terrain height estimate; terrain mapping; two-pass method; unwrapped phase; Electromagnetic propagation; Electromagnetic scattering; Extraterrestrial measurements; Filtering; Geometry; Laboratories; Level measurement; Parameter estimation; Phase estimation; Terrain mapping;

fLanguage

English

Publisher

ieee

Conference_Titel

Geoscience and Remote Sensing Symposium Proceedings, 1998. IGARSS '98. 1998 IEEE International

Conference_Location

Seattle, WA

Print_ISBN

0-7803-4403-0

Type

conf

DOI

10.1109/IGARSS.1998.703694

Filename

703694