Paper Info
Title
Medium-Earth-Orbit SAR Focusing Using Range Doppler Algorithm With Integrated Two-Step Azimuth Perturbation
Abstract
Existing low-Earth-orbit synthetic aperture radar (SAR) algorithms generally assume that the data are azimuth invariant. However, this assumption does not hold for the medium-Earth-orbit (MEO) SAR systems due to the significantly longer azimuth integration time and complex imaging geometries. As a result, the MEO SAR data cannot be processed accurately and efficiently using the existing algorithms. To solve this problem, this letter proposes a two-step azimuth perturbation (AP) method that uses the first-step AP to remove the bulk azimuth variance at the range processing stage and the second-step AP to remove the residual variance at the azimuth processing stage. As an example, an improved range Doppler algorithm with the integrated two-step AP is discussed in this letter. Simulations of an L-band MEO SAR with 5-m resolution at 10 000-km orbit height are used to demonstrate the validity and accuracy of this algorithm.
Year
DOI
Venue
2015
10.1109/LGRS.2014.2353674
IEEE Geosci. Remote Sensing Lett.
Keywords
Field
DocType
synthetic aperture radar,range doppler algorithm,perturbation theory,range doppler (rd) algorithm,l-band meo sar,earth orbit,synthetic aperture radar (sar) data processing,remote sensing by radar,medium-earth-orbit (meo),azimuth perturbation (ap),medium-earth-orbit sar focusing,integrated two-step azimuth perturbation,remote sensing,doppler effect,azimuth,geometry
Radar imaging,Synthetic aperture radar,Side looking airborne radar,Remote sensing,Medium Earth orbit,Azimuth,Algorithm,Inverse synthetic aperture radar,Time delay and integration,Doppler effect,Mathematics
Journal
Volume
Issue
ISSN
12
3
1545-598X
Citations 
PageRank 
References 
3
0.41
8
Authors
5
Name
Order
Citations
PageRank
Lijia Huang1316.40
Xiaolan Qiu219026.75
Donghui Hu317116.73
Bing Han4279.29
Chibiao Ding522333.52