Spotlight SAR data focusing based on a two-step processing approach

@article{Lanari2001SpotlightSD,
  title={Spotlight SAR data focusing based on a two-step processing approach},
  author={Riccardo Lanari and Manlio Tesauro and Eugenio Sansosti and Gianfranco Fornaro},
  journal={IEEE Trans. Geosci. Remote. Sens.},
  year={2001},
  volume={39},
  pages={1993-2004}
}
The authors present a new spotlight SAR data-focusing algorithm based on a two-step processing strategy that combines the advantages of two commonly adopted processing approaches: the efficiency of SPECAN algorithms and the precision of stripmap focusing techniques. The first step of the proposed algorithm implements a linear and space-invariant azimuth filtering that is carried out via a deramping-based technique representing a simplified version of the SPECAN approach. This operation allows… 

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References

SHOWING 1-10 OF 32 REFERENCES

Spotlight SAR image generation based on strip mode focusing techniques

TLDR
The authors present a new solution for spotlight SAR data processing based on strip mode focusing techniques, which allows for the fully focused spotlight image to be achieved.

Spotlight SAR data processing using the frequency scaling algorithm

TLDR
A new processing algorithm for spotlight SAR data processing that performs the range cell migration correction for non-chirped raw data without interpolation by using a novel frequency scaling operation is presented.

High resolution processing of hybrid strip-map/spotlight mode SAR

TLDR
By steering the radar antenna about a point further away from the radar than the centre of the area being imaged, illumination times between that of strip-map and spotlight mode are achieved, thus resulting in different combinations of resolutions and spot sizes than is the case for traditional spotlight mode.

A SAR correlation algorithm which accommodates large-range migration

  • M. JinChialin Wu
  • Environmental Science
    IEEE Transactions on Geoscience and Remote Sensing
  • 1984
TLDR
Simulation results provided here indicate that this processing algorithm yields a satisfactory compressed impulse response for SAR data with large-range migration whereas previous methods were subject to a broadening of the impulse response along range.

Precision SAR processing using chirp scaling

TLDR
Based on quantitative comparison, the chirp scaling algorithm provides image quality equal to or better than the precision range/Doppler processor, as defined by the system bandwidth.

Spotlight-Mode Synthetic Aperture Radar: A Signal Processing Approach

From the Publisher: Spotlight-mode Synthetic Aperture Radar: A Signal Processing Approach describes an important mode of synthetic aperture radar (SAR) imaging, known as spotlight-mode SAR. By

Application of efficient linear FM matched filtering algorithms to synthetic aperture radar processing

The applicability of two relatively new linear FM matched filtering algorithms to the processing of synthetic-aperture radar (SAR) data is examined and compared to the fast-convolution algorithm. The

High quality spotlight SAR processing algorithm designed for LightSAR mission

  • M. Jin
  • Environmental Science
    IGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development
  • 1997
TLDR
A high quality spotlight SAR processing algorithm is presented, which achieves better image quality than that previously achieved by the backprojection algorithm and lower S/W development cost.

Convolution backprojection image reconstruction for spotlight mode synthetic aperture radar

Convolution backprojection (CBP) image reconstruction has been proposed as a means of producing high-resolution synthetic-aperture radar (SAR) images by processing data directly in the polar

Spot Mode Sar Focusing With The W - K Technique

In this paper the application of the w - k technique to spot mode SAR focusing is analyzed. Spot-light mode SAR can be regarded as a special case of time- varying Doppler centroid system. In this