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ARTs:

Data Processing
Acceptance criteria:
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new test vectors are designed and produced to test spectral and temporal fidelity requirements

pcap file from Low CBF converted to DADA using the PST Voltage Recorder (offline ingestion and processing with PST)

DADA file processed and PFB inverted using dspsr

output of dspsr is compared against known test vectors and report is distributed to stakeholders

newly-developed software used to perform test vector comparison is published for future integrated in CI pipelines
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new test vectors are designed and produced to test spectral and temporal fidelity requirements pcap file from Low CBF converted to DADA using the PST Voltage Recorder (offline ingestion and processing with PST) DADA file processed and PFB inverted using dspsr output of dspsr is compared against known test vectors and report is distributed to stakeholders newly-developed software used to perform test vector comparison is published for future integrated in CI pipelines
Feature Points:
1.5
Initial Size:
3
WSJF:
0
Agile Teams:

Team_PST
Due Sprint:
Sprint 5
Story Point Burn-up:
Overdue:

Who?

Why?

The ability to invert the channelisation performed in the beamformer to recover a high-fidelity time series with greater time resolution (i.e. PFB inversion) is critical to the high-precision pulsar timing capability of the SKA. The implementation of a real-time PFB inversion of CBF data in PST has not yet been demonstrated to work, so this work aims to retire the risk associated with this critical function, as early as possible.

What?

As part of this Feature's deliverables, the PST Complex Voltage Recorder will be used to ingest a pcap file that has been previously captured from the LOW PST beamformer, and to write the unpacked complex voltages to disk (as a DADA archive). The recorded DADA files will then be processed by the dspsr implementation of the PFB inversion, which will invert the filterbank, and then the signal fidelity of the inverted channels, in terms of the spectral and temporal performance, will be demonstrated.

Story Point Burn-up: (78.57%)

Feature Estimate: 1.5

Demonstrate the signal fidelity of Polyphase Filter Bank (PFB) inversion using the Low CBF tied-array beam signal into PST