As @Benjamin tells, these data do not have the capability to extract covariance or coherence matrices, My problem was solved 5 months ago and I should have ordered SSC data of TerraSAR-x.
From the TerraSAR-X Documentation and in Basic Product Specification PDF File on pages with the following specifications (issue and update):
- Doc.: TX-GS-DD-3302
- Issue: 1.9
- Date: 09.10.2013
and on pages 40 and 41 we have:
Single Look Slant Range Complex (SSC)
Geometric Projection: Azimuth – Slant Range (time domain)
This product is the basic single look product of the focused radar
signal. The pixels are spaced equidistant in azimuth (according to the pulse repetition interval PRI=1/PRF) and in slant range (according to the range sampling frequency) and the data are represented as complex numbers. Each image pixel is processed to zero Dopper coordinates, i.e. perpendicular to the flight track. This convention is compatible with the standard
slant range products available from ERS-1/2, ENVISAT/ASAR, RADARSAT and from X-SAR/SIRC.
Spotlight products will be processed to zero Doppler coordinates like
stripmap products with an artificial PRF selected large enough to hold
the total processed Doppler spectrum. The products are therefore
widely compatible with complex stripmap products. However, it must be
considered that the Doppler centroid varies strongly with azimuth.
The SSC product is intended for scientific applications that require
the full bandwidth and the phase information, e.g. SAR interferometry
and interferometric polarimetry. Any possible offsets in the antenna
phase pattern between TSX-1 and TDX-1 will be compensated and
annotated in the product when applicable.
Multi Look Ground Range Detected (MGD)
Geometric Projection: Azimuth – Ground Range (without terrain
This product is a detected multi look product with reduced speckle and
approximately square resolution cells on ground. The image coordinates
are oriented along flight direction and along ground range. The pixel
spacing is equidistant in azimuth and in ground range. A simple
polynomial slant to ground projection is performed in range using a
WGS84 ellipsoid and an average, constant terrain height parameter.
The advantage of this product is that no image rotation to a map
coordinate system is performed and interpolation artifacts are thus
avoided. Consequently, the pixel localization accuracy is lower than
in geocoded products. As for all TS-X L1b products, a coarse grid of
coordinates is annotated in the product. The grid coordinates are
calculated using a coarse DEM, while the projection of the image data
is performed using an ellipsoid with one elevation determined for the
So in MGD(Multilook Ground Detected) format, we've lost real and imaginary parts of complex data and PolSARpro can not read them and extract coherency and covariance matrices of polarimetric data and for this application, we need SSC (Single look Slant range Complex) data.