Hi,
Then this is more a question about SNAP usage than on the content of the data.
Are you referring to Python S1-TOPS-SPLIT Analyzer
If so, this may be “just” about adding the relative burst ID to the list of information extracted by the tool, and/or placing an entry value to filter by relative burst id.
The source code being accessible here GitHub - pbrotoisworo/s1-tops-split-analyzer: Python interface for visualizing and extracting Sentinel-1 TOPS SPLIT data that is used in ESA SNAP Software you can implement this as well.
Maybe @panjibrotoisworo can help ?