Annotation file for S-1 raw data

Hello, I am trying to extract annotation file for S-1 raw data in python. It is a .dat file (eg. s1a-ew-raw-s-vh-________annot.dat).
For the SLC data I could get the radar system parameters from .xml file but this is not the case for the raw data.

Is there any way to extract the parameters, e.g. steering angle rate, from the annotation file of raw S-1 data in Python. It will even be better if I could do it with SNAP software. Thanks for the help.

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