Extended chirp scaling algorithm for air- and spaceborne SAR data processing in stripmap and ScanSAR imaging modes

Presents a generalized formulation of the extended chirp scaling (ECS) approach for high precision processing of air- and spaceborne SAR data. Based on the original chirp scaling function, the ECS algorithm incorporates a new azimuth scaling function and a subaperture approach, which allow an effect...

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Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing 1996-09, Vol.34 (5), p.1123-1136
Main Authors: Moreira, A., Mittermayer, J., Scheiber, R.
Format: Article
Language:English
Subjects:
Azimuth
Chirp
Data processing
Earth sciences
Earth, ocean, space
Exact sciences and technology
Frequency modulation
Image coding
Image sampling
Interpolation
Pulse compression methods
Pulse modulation
Signal resolution
Soils
Surficial geology
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Summary:Presents a generalized formulation of the extended chirp scaling (ECS) approach for high precision processing of air- and spaceborne SAR data. Based on the original chirp scaling function, the ECS algorithm incorporates a new azimuth scaling function and a subaperture approach, which allow an effective phase-preserving processing of ScanSAR data without interpolation for azimuth geometric correction. The azimuth scaling can also be used for automatic azimuth coregistration of interferometric image pairs which are acquired with different sampling distances. Additionally, a novel range scaling formulation is proposed for automatic range coregistration of interferometric image pairs or for improved robustness for the processing of highly squinted data. Several simulation and processing results of air- and spaceborne SAR data are presented to demonstrate the validity of the proposed algorithms.
ISSN:0196-2892
1558-0644
DOI:10.1109/36.536528