Add de-ripple key/value pairs to subfile - Githubissues

MWATelescope / mwax_udp2sub

MWAX (MWA new correlator) Multicast UDP high time resolution data capture

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Add de-ripple key/value pairs to subfile #4

Closed gsleap closed 3 months ago

gsleap commented 7 months ago

Input

mwax_u2s reads a Metafits file for each 8 second subobservation file it attempts to create. There are already some things read from the metafits file already. This issue is to read another contains 2 keys we care about and put them into the subfile header:
- Extra metafits keys to read:
- DR_FLAG (bit 0 | 1)
- DR_PARAM (string e.g. "deripplev1")

Output

When writing the subfile PSRDADA header, write out:
- APPLY_COARSE_DERIPPLE (bit 0|1 based on DR_FLAG from metafits)
- DR_PARAM (based on DR_PARAM from metafits)

Note

This issue has been partly implemented in the oversampling-static branch

Documentation

Update wiki page MWAX PSRDADA header

shrydar commented 3 months ago

DERIPPLE flag read from metafits file and written out as APPLY_COARSE_DERIPPLE to subfile header as per oversampling-static branch, cf https://github.com/MWATelescope/mwax_udp2sub/commit/f14572ec591a7cebac0a2518cb3fb6f22bc6dac3

DR_FLAG is to be deprecated, and DR_PARAM doesn't need to be passed through - we'll only ever have one set of deripple parameters in play, and they're unlikely to change (though they may end up being receiver dependent).