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changes.mady.by.user Fernando

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titleHow do I set up my observation for polarisation calibration?

Status
colourYellow
titlein development
See discussion on polarisation calibration.

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titleCan I request night time observations only to minimise RFI?

The MeerKAT RFI environment is dominated by satellite-based RFI and as such is largely independent of time of day. Solar interference may play a factor in observations of low-surface brightness HI and this may be justification for night-only observations.

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titleWhat are the 'pool resources' listed in the OPT when I am setting up instrument parameters for my observation?

These specify the systems that will receive data from the digitisers. Standard observations must have the correlator/beamformer (CBF) and the science data processor (SDP). Optional resources are the user-supplied equipment (USE), which capture data commensally.

Data reduction

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titleMy strong spectral line has been flagged by SDP. What do I do?

Do not apply all flags when converting to MS format. ingest_rfi flags any outliers and usually catches lines such as Galactic HI and masers. In this case you should only use --static, --cam, --data_lost

Flag descriptions are here.

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titleWhy is so much of my data flagged?

  • Calibration for the preceding cal scans failed, thus causing subsequent target scans to be flagged. This was quite frequent in the early development phases of the pipeline.

Do not apply SDP flags when downloading data. (link to relevant section in SDP doc) setting up the conversion to measurement set, or disable the flags in CASA.

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titleWhat sort of compute resources will I need to reduce and analyse my data?

See the page on compute requirements.