DocumentCode :
327032
Title :
Ice flow in northeast Greenland derived using balance velocities as control
Author :
Joughin, Ian ; Fahnestock, Mark ; Thomas, Bob ; Kwok, Ron
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Volume :
4
fYear :
1998
fDate :
6-10 Jul 1998
Firstpage :
2246
Abstract :
Satellite radar interferometry provides an important new means for measuring ice motion. To make absolute velocity measurements, ground-control points typically are required to refine interferometric baseline estimates. The vast scale and remote location of the ice sheets make it difficult to obtain in situ ground-control data. Balance velocities derived from satellite altimetry digital-elevation models (DEMs) provide an alternate, though less accurate, source of control data. The authors demonstrate a case in which they are able to achieve an accuracy of just over 3 m/yr using this type of control
Keywords :
glaciology; hydrological techniques; remote sensing by radar; spaceborne radar; DEM; Greenland ice sheet; absolute velocity measurement; accuracy; balance velocities; control; digital-elevation model; ground-control point; ice flow; ice motion; interferometric baseline estimate; measurement technique; polar ice sheet; radar remote sensing; satellite radar altimetry; satellite radar interferometry; spaceborne radar; Error correction; Ice; Laboratories; Layout; Propulsion; Radar tracking; Satellites; Strips; Velocity control; Velocity measurement;
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.1998.703801
Filename :
703801
Link To Document :
بازگشت