Where to download Quad Pol SAR data for the application of Oill Spill Detection?

Sorry for the of topic question, but I am really having trouble finding it. The links provided in the SNAP Tutorials are not having secure connection, hence they are asking me login id and password. The other sites having too many components which I am not understanding as per its is very difficult for me to understand the terms, name of the sensors, satellites etc. So since you all are having experience in this field, please provide me with the links that can be accessed in Indian Server.

please use the search function: RADARSAT-2 Ultra Fine InSAR data suplied by MDA as test data in S1TBX tutorial