An interferometric quick-look processor

A technique to get medium resolution (40/spl times/40 m, on the ground), strip-map synthetic aperture radar (SAR) interferograms and coherence maps close to real-time by means of common UNIX workstations or PCs is presented. The requested efficiency is achieved by the following: 1) exploiting the spectral shift principle to reduce the data rate at the cost of some signal loss; 2) exploiting polyphase filters and integer implementation to get azimuth looks; 3) implementing a fast and robust estimator of coregistering parameters based both on amplitude cross correlation and of looks' phase mismatch estimate.

[1]  E. Rodríguez,et al.  Theory and design of interferometric synthetic aperture radars , 1992 .

[2]  R. Goldstein,et al.  Crossed orbit interferometry: theory and experimental results from SIR-B , 1988 .

[3]  C. Sidney Burrus,et al.  On computing the split-radix FFT , 1986, IEEE Trans. Acoust. Speech Signal Process..

[4]  Claudio Prati,et al.  SAR interferometry: a "Quick and dirty" coherence estimator for data browsing , 1997, IEEE Trans. Geosci. Remote. Sens..

[5]  Richard Bamler,et al.  Decorrelation induced by interpolation errors in InSAR processing , 1997, IGARSS'97. 1997 IEEE International Geoscience and Remote Sensing Symposium Proceedings. Remote Sensing - A Scientific Vision for Sustainable Development.

[6]  Richard Bamler,et al.  A comparison of range-Doppler and wavenumber domain SAR focusing algorithms , 1992, IEEE Trans. Geosci. Remote. Sens..

[7]  M. Foster,et al.  THE COEFFICIENT OF COHERENCE: ITS ESTIMATION AND USE IN GEOPHYSICAL DATA PROCESSING , 1967 .

[8]  Richard Bamler,et al.  Phase statistics and decorrelation in SAR interferograms , 1993, Proceedings of IGARSS '93 - IEEE International Geoscience and Remote Sensing Symposium.

[9]  Fabio Rocca,et al.  The wavenumber shift in SAR interferometry , 1994, IEEE Trans. Geosci. Remote. Sens..

[10]  F. Gatelli,et al.  Initial testing of ERS Tandem data quality for InSAR applications; Examples from Taiwan, Madagascar, Zaire, Ivory Coast, Mali and Greenland , 1997 .