Paper
28 January 2002 Design criteria and comparison between conventional and subaperture SAR processing in airborne systems
Pau Prats, Marc Bara, Antoni Broquetas
Author Affiliations +
Proceedings Volume 4543, SAR Image Analysis, Modeling, and Techniques IV; (2002) https://doi.org/10.1117/12.453973
Event: International Symposium on Remote Sensing, 2001, Toulouse, France
Abstract
This paper compares two different approaches for designing airborne SAR systems. The first one is the most common where conventional processing is employed, and therefore wide antenna beams are to be used in order to avoid ambiguities in the final image due to attitude variations. A second approach is proposed to lower the requirements such system imposes based on subaperture processing. The idea is to follow the azimuth variations of the Doppler centroid, without increasing the hardware requirements of the system. As it is shown in this paper, this processing procedure must be complemented with precise radiometric corrections, because the platform may experience small attitude variations, which could increase/decrease the target observation time, inducing a significant azimuth modulation in the final image. This leads to the definition of a new criterion concerning maximum attitude deviations for an airborne platform.
© (2002) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Pau Prats, Marc Bara, and Antoni Broquetas "Design criteria and comparison between conventional and subaperture SAR processing in airborne systems", Proc. SPIE 4543, SAR Image Analysis, Modeling, and Techniques IV, (28 January 2002); https://doi.org/10.1117/12.453973
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KEYWORDS
Image processing

Synthetic aperture radar

Doppler effect

Signal processing

Antennas

Radiometric corrections

Modulation

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