Dear Sir/Madam,
Is it possible to download TerraSAR-X free data? I am a researcher in the Tehran university and like to know more about the capabilities of SAR data.
I also have a question:
what is the highest accuracy and resolution of DEM generated by TerraSAR-X data? how many GCP need to geo-reference the raw data? i will be so happy if you can introduce me a known paper describing the details of subject.

with best regards
mohammad