Utilities

Overview

This package provides a number of utilities to work with CCSDS packets.

Splitting Mixed Streams by APID

Often, CCSDS data will arrive from external sources into software systems in a single file with multiple APIDs. Splitting a mixed file or stream of bytes by APID so they can be used with the ccsdspy.FixedLength class can be done through the API or with the module command line interface.

from ccsdspy.utils import split_by_apid

with open('mixed_file.bin', 'rb') as mixed_file):
    # dictionary mapping integer apid to BytesIO
    stream_by_apid = split_by_apid(mixed_file)

$ python -m ccsdspy split mixed_file.tlm
Parsing done!
Writing ./apid00132.tlm...
Writing ./apid00134.tlm...
Writing ./apid00258.tlm...
Writing ./apid00384.tlm...
Writing ./apid00385.tlm...
Writing ./apid00386.tlm...
Writing ./apid00387.tlm...