Abstract
Signal properties of spaceborne spotlight SAR (synthetic aperture radar) were discussed. The relations of centroid Doppler, Doppler bandwidth and pulse repetition frequency with squint angle were analyzed. Based on a modified Chirp Scaling algorithm, a subaperture method was used, so that the data rate and radar transmit peak power can be reduced, and the time variability of Doppler center frequency can be resolved. The necessity of yaw steering was analyzed, and a yaw steering rule was given. It was proved that yaw steering can be used to decrease range migration and reduce imaging difficulties. The validity of the processing method was tested by computer simulation.
| Original language | English |
|---|---|
| Pages (from-to) | 643-647 |
| Number of pages | 5 |
| Journal | Beijing Hangkong Hangtian Daxue Xuebao/Journal of Beijing University of Aeronautics and Astronautics |
| Volume | 28 |
| Issue number | 6 |
| State | Published - Dec 2002 |
Keywords
- Image formation
- Subaperture method
- Synthetic aperture radar
- Yaw steering
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