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| A New Approach to Compensating Spatially Variant Phase Error in Airborne Wideband SAR |
| Meng Da-di;Ding Chi-biao |
| Institute of Electronics, Chinese Academy of Sciences, Beijing 100080, China |
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Abstract A new motion compensation algorithm dealing with spatially variant phase error in azimuth direction is purposed in this article. Traditionally, only the spatially invariant part of phase error can be compensated and the residual spatially variant part is ignored. It is essential to compensate the spatially variant part of phase error in the high resolution wideband SAR. The new algorithm purposed in this article manages this part of phase error by splitting the SAR data to several sub-apertures in range-Doppler domain and compensates the spatially variant phase error respectively. The azimuth resolution is enhanced when the new algorithm is embedded into the traditional motion compensation algorithm.
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Received: 08 March 2006
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2007, Vol. 29 
