7 th CNES/DLR Workshop LISTIC / TSI / GIPSA-lab / MAP- PAGE 1 High Resolution SAR Interferometry: estimation of local frequencies in the context of Alpine glaciers G. Vasile G. Vasile , E. Trouvé, I. Petillot, Ph. Bolon, J.-M. , E. Trouvé, I. Petillot, Ph. Bolon, J.-M. Nicolas, Nicolas, M. Gay, J. Chanussot, T. Landes and P. Grussenmeyer M. Gay, J. Chanussot, T. Landes and P. Grussenmeyer [email protected][email protected]
25
Embed
G. Vasile , E. Trouvé, I. Petillot, Ph. Bolon, J.-M. Nicolas,
High Resolution SAR Interferometry: estimation of local frequencies in the context of Alpine glaciers. G. Vasile , E. Trouvé, I. Petillot, Ph. Bolon, J.-M. Nicolas, M. Gay, J. Chanussot, T. Landes and P. Grussenmeyer [email protected]. Outlines. Context: InSAR high resolution - PowerPoint PPT Presentation
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
High Resolution SAR Interferometry: estimation of local
frequencies in the context of Alpine glaciersG. VasileG. Vasile, E. Trouvé, I. Petillot, Ph. Bolon, J.-M. Nicolas,, E. Trouvé, I. Petillot, Ph. Bolon, J.-M. Nicolas,
M. Gay, J. Chanussot, T. Landes and P. Grussenmeyer M. Gay, J. Chanussot, T. Landes and P. Grussenmeyer
: 2D sine-wave estimated on large square windows (*)
: 2D sine-wave
Need of adaptive neighborhood
Need of new estimation technique
nHRLR iiii eeee
(*) E. Trouvé et al. “Improving phase unwrapping techniques by the use of local frequency”, IEEE Transactions on Geoscience and Remote Sensing, 36(6):1963-1972, 1998
(*) G. Vasile et al. “Intensity-Driven-Adaptive-Neighborhood Technique for Polarimetric and Interferometric SAR Parameters Estimation”. IEEE Transactions on Geoscience and Remote Sensing, 44(5):1609-1621, 2006
2-step region growing technique (*)
Driven simultaneously on all the intensities of the input data set; AN makes it possible to reach the number of pixels necessary
for reliable estimation;
AN preserves the stationarity since most of the sources of phase nonstationaritymost of the sources of phase nonstationarityare revealed by the SAR intensity are revealed by the SAR intensity which is mostly influenced by the local slopewhich is mostly influenced by the local slope.
ConclusionsConclusions:: HRHR frequency estimation combined with intensity driven frequency estimation combined with intensity driven
adaptive neighborhood;adaptive neighborhood; estimate local frequenciesestimate local frequencies within HR interferograms; within HR interferograms; measure the measure the local topographic variationslocal topographic variations in in
interferograms with a interferograms with a small altitude of ambiguitysmall altitude of ambiguity..
Future directions:Future directions: Chamonix – Mont Blanc Chamonix – Mont Blanc glacier monitoring glacier monitoring by D-InSAR,by D-InSAR, New context: POL-InSAR airborne data.New context: POL-InSAR airborne data.
This work was supported by the French national project ACI-MEGATOR. The authors wish to thank the European Space Agency for providing the SAR data through the Category 1 proposal No.3525.