ENVISAT ASAR data reduction: Impact on SAR interferometry

被引：37
|
作者：
McLeod, IH [1 ]
Cumming, IG [1 ]
Seymour, MS [1 ]
机构：
[1] Univ British Columbia, Dept Elect Engn, Vancouver, BC V6T 1Z4, Canada
来源：
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 1998年 / 36卷 / 02期
基金：
加拿大自然科学与工程研究理事会;
关键词：
block adaptive quantization; data compression; satellite interferometry;
D O I：
10.1109/36.662741
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
An onboard synthetic aperture radar (SAR) signal-data reduction algorithm called Flexible Block Adaptive Quantization (FBAQ) was developed in 1994 for the Advanced SAR (ASAR) on the ENVISAT satellite, This paper presents work done in a follow-on study that examined the impact of the data-reduction algorithm on the accuracy of two digital elevation models (DEM) produced by using the technique of repeat-pass SAR interferometry. All three allowable data compression ratios were investigated to determine the maximum compression ratio appropriate for SAR interferometry. Based on the scenes studied in this paper, it was concluded that a reduction from 8 to 4-bits/sample was the maximum data reduction ratio appropriate for precision SAR interferometry, while 8 to 3-bits/sample and 8 to 2-bits/sample encoding were only appropriate for less-demanding wide-swath applications.
引用
收藏
页码：589 / 602
页数：14
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