Raw data processing

Continuing the discussion from Focusing Level-0 Sentinel1 data using SNAP:

i would like to know how to process the raw satellite data of sentinel 1 using s1 tool box ,if not how would i process it to next level

My understanding is that it is not possible to process L0 data to SLC using the S1 Tool Box. Your best option is to download the SLC data from the Sentinels Data Hub for free from https://scihub.copernicus.eu/ (registration required).