Spaceborne SAR processing for wide-beam and large-squint-angle systems

Michael Y. Jin; Scott Hensley; Anhua Chu

doi:10.1117/12.152583

19 August 1993 Spaceborne SAR processing for wide-beam and large-squint-angle systems

Michael Y. Jin, Scott Hensley, Anhua Chu

Proceedings Volume 1935, Microwave Instrumentation for Remote Sensing of the Earth; (1993) https://doi.org/10.1117/12.152583
Event: Optical Engineering and Photonics in Aerospace Sensing, 1993, Orlando, FL, United States

Abstract

At the present time, the strip mode aircraft Synthetic Aperture Radar (SAR) processing techniques are relatively more mature than the spaceborne SAR processing techniques. In airborne SAR, the exact formulation for the point target response has been made in both the time and frequency domain. Efficient and accurate wave domain processing techniques such as the chirp scaling algorithm, have thus far been optimized for airborne SAR systems. With regards to spaceborne SAR processing, the existing analysis and processing algorithms are only applicable to narrow beam systems where the phase function is well approximated by the second order polynomial. There were also no detailed studies to show the applicability and the performance of the chirp scaling algorithm when applied to the spaceborne SAR systems. This paper provides a proposed solution and the supporting analysis for extending spaceborne SAR processing techniques to cases having wide beam angles as well as large squint angles. Detailed discussion are made on how to adapt the chirp scaling algorithm to spaceborne SAR, the requirement in updating processing parameters, and the approach for flexible pixel location and higher phase fidelity.

Citation Download Citation

Michael Y. Jin, Scott Hensley, and Anhua Chu "Spaceborne SAR processing for wide-beam and large-squint-angle systems", Proc. SPIE 1935, Microwave Instrumentation for Remote Sensing of the Earth, (19 August 1993); https://doi.org/10.1117/12.152583

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