i’m using snap and i wan to create if possible a SLC image with hh polarisation.
have you any idea about it ?
thank
Please start from the S1TBX tutorials (accessible vie the Help-menu).
Can you please ask more specificly? What data are you using?
Have you had a look at this document?
http://sentinel1.s3.amazonaws.com/docs/S1TBX%20SAR%20Basics%20Tutorial.pdf
Edit: mengdahl was faster, sorry.
i followed this tutorials but i use a SLC image and i need this polarisation to create the C matrix with matlab code
Download a product with HH-polarisation in it - it’s already an SLC image.
what data are you using?
In the case you downloaded Sentinel-1 (VV and VH): Polarisations cannot be generated, they are a product of sensor configuration. If no horizontal waves were emmitted by the satellite at the time of image aquisition, it is impossible to get HH information from it.
Sentinel-1 (and many other SAR satellites) only operates in single or dual polarisation. For the polarimetric matrix generation you need quad-polarized data (HH/HV/VH/VV) which is acquired by only few SAR satellites (ALOS, Radarsat, TerraSAR-X).
ALOS PALSAR data can be downloaded for free. But they are only available as archived data between 2007-2011 and 2002-2012 respectively.
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As I understand, you want to create a covariance matrix C2 (if dual pol Sentinel-1 data) or C3 (if quad pol Radarsat-2 or ALOS data)?
You can use the polarimetic matrix generation operator on an SLC containing the HH+HV or all polarizations.
Correction here: ENVISAT ASAR was not quad pol but dual pol with APS products.
you’re right…
Don’t know how I came to this idea…