[email protected]27-July-2010 Fully Polarimetric TerraSAR-X Data: Data Quality and Scientific Analysis Irena Hajnsek 1/2 , Kostas Papathanassiou 1 , Thomas Busche 1 , Thomas Jagdhuber 1 , JunSu Kim 1 , Maria Sanjuan Ferrer 1 , Stefan Sauer 1 , Michelangelo Villano 1 1 Microwaves and Radar Institute & ²Institute of Environmental Engineering, ETH Zurich
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TU1.L09.3 - Fully Polarimetric TerraSAR-X Data: Data Quality and Scientific Analysis
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Interferometric Coherences @ Different Polarisations
|HV12|
|SHV1| ||SHV1|-|SHV2||
|VV12|
|SVV1| ||SVV1|-|SVV2||
|HH12|
|SHH1| ||SHH1|-|SHH2||
April 25th - May, 6thApril 14th - May, 6thApril 14th - April, 25th
Slide 22
San Francisco (11/04/2010)
Slide 23
range
|HH+VV| |HH-VV| |HV|
Double-bounce
Single-bounce
Triple-bounce
2
π
Alpha_1
0
Double-bounce
Single-bounce
Triple-bounce
Polarimetric TSX Image of the Golden Gate Bridge
Slide 24
2
π
Alpha_1
0
Double-bounce
Single-bounce
Triple-bounce
Double-bounce
Polarimetric TSX Image of the Golden Gate Bridge
Slide 25
Coherent Scatterers (CSs) Detection
Method: Phase Variance ApproachBased on the deterministic phase pattern across the spectrum characteristic of the CSs.
It allows a widely preservation of the spatial resolution in the CSs detection.
Common detection: Only the CSs that have a phase derivative variance σ² lower than a given threshold in both directions (range and azimuth) are considered as detected CSs.
10 sublooks of 60 MHz each out of the 150 MHz range bandwidth are formed and the variance σ² of the phase derivative for every pixel is estimated.
10 sublooks of 552 Hz each out of the 1380 Hz azimuth bandwidth and the variance of the phase derivative for every pixel is estimated.
Fixing a threshold (σ² ), pixels with a phase derivative variance lower than the threshold in range and azimuth at the same time will be considered as a detected CSs.