JOURNAL OF RADARS
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JOURNAL OF RADARS  2013, Vol. 2 Issue (4): 492-498    DOI: 10.3724/SP.J.1300.2013.13040
Special Topic Papers:Synthetic Aperture Radar (SAR) Current Issue | Next Issue | Archive | Adv Search |
Effects of Target Positioning Error on Motion Compensation for Airborne Interferometric SAR
Li Yin-wei①② Wei Li-dengXiang Mao-sheng
(National Key Laboratory of Science and Technology on Microwave Imaging, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China)
(University of Chinese Academy of Sciences, Beijing 100049, China)
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Abstract The measurement inaccuracies of Inertial Measurement Unit/Global Positioning System (IMU/GPS) as well as the positioning error of the target may contribute to the residual uncompensated motion errors in the MOtion COmpensation (MOCO) approach based on the measurement of IMU/GPS. Aiming at the effects of target positioning error on MOCO for airborne interferometric SAR, the paper firstly deduces a mathematical model of residual motion error bring out by target positioning error under the condition of squint. And the paper analyzes the effects on the residual motion error caused by system sampling delay error, the Doppler center frequency error and reference DEM error which result in target positioning error based on the model. Then, the paper discusses the effects of the reference DEM error on the interferometric SAR image quality, the interferometric phase and the coherent coefficient. The research provides theoretical bases for the MOCO precision in signal processing of airborne high precision SAR and airborne repeat-pass interferometric SAR.
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Li Yin-wei
Wei Li-deng
Xiang Mao-sheng
Key wordsAirborne interferometric SAR   Target positioning error   MOtion COmpensation (MOCO)   Residual motion error     
Received: 2013-04-09; Published: 2013-08-28
Cite this article:   
Li Yin-wei,Wei Li-deng,Xiang Mao-sheng. Effects of Target Positioning Error on Motion Compensation for Airborne Interferometric SAR[J]. JOURNAL OF RADARS, 2013, 2(4): 492-498.
 
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