Motion measurement errors and autofocus in bistatic SAR

被引：38

作者：

Rigling, BD ^{[1
]}

Moses, RL

机构：

[1] Wright State Univ, Dept Elect Engn, Dayton, OH 45435 USA

[2] Ohio State Univ, Dept Elect & Comp Engn, Columbus, OH 43210 USA

来源：

IEEE TRANSACTIONS ON IMAGE PROCESSING | 2006年 / 15卷 / 04期

关键词：

autofocus; bistatic; ground map; motion measurement errors motion measurement errors (MMEs); synthetic aperture radar (SAR);

D O I：

10.1109/TIP.2005.863943

中图分类号：

TP18 [人工智能理论];

学科分类号：

081104 ; 0812 ; 0835 ; 1405 ;

摘要：

This paper discusses the effect of motion measurement errors (MMEs) on measured bistatic synthetic aperture radar (SAR) phase history data that has been motion compensated to the scene origin. We characterize the effect of low-frequency MMEs on bistatic SAR images, and, based on this characterization, we derive limits on the allowable MMEs to be used as system specifications. Finally, we demonstrate that proper orientation of a bistatic SAR image during the image formation process allows application of monostatic SAR autofocus algorithms in postprocessing to mitigate image defocus.

引用

页码：1008 / 1016

页数：9

共 13 条

[1]

ARIKAN O, 1988, P COMCON 88 OCT, P418

[2] GEOMETRIC ACCURACY IN AIRBORNE SAR IMAGES [J].

BLACKNELL, D ;

FREEMAN, A ;

QUEGAN, S ;

WARD, IA ;

FINLEY, IP ;

OLIVER, CJ ;

WHITE, RG ;

WOOD, JW .

IEEE TRANSACTIONS ON AEROSPACE AND ELECTRONIC SYSTEMS, 1989, 25 (02) :241-258

[3] SOME METHODS FOR REDUCING PROPAGATION-INDUCED PHASE ERRORS IN COHERENT IMAGING-SYSTEMS .1. FORMALISM [J].

BROWN, WD ;

GHIGLIA, DC .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION, 1988, 5 (06) :924-941

[4]

Carrara W. G., 1995, SPOTLIGHT SYNTHETIC

[5] PHASE-GRADIENT ALGORITHM AS AN OPTIMAL ESTIMATOR OF THE PHASE DERIVATIVE [J].

EICHEL, PH ;

JAKOWATZ, CV .

OPTICS LETTERS, 1989, 14 (20) :1101-1103

[6]

GARVIN ADM, 1991, P S AFR S COMM SIGN, P32

[7]

JAKOWATZ C, 1996, SPOTLIGHT MADE SYNTH

[8]

KENNEDY TA, 1988, IEEE AEROSP ELEC OCT, P32

[9]

Mancill CE., 1981, Annual Tri-Service Radar Symposium Record, P391

[10]

MIKHAIL C, 2000, P IEEE INT GEOSC REM, V2, P861

← 1 2 →