Requirements: Collection Support: VLA Pulsar Observation
JIRA Ticket: SSA-6377 - Getting issue details... STATUS
Pulsar file ingestion and metadata extraction will proceed similarly to an EVLA SDM ingestion with possible additional (science, ancillary?) products, identified in a metadata.json file.
Binned Imaging Observations
In binning mode there are no additional products. The only science product is the execution block as defined by the SDM. The SDM will contain an additional table, Pulsar.xml which will give the metadata for the scans using binning mode. Scan information is retrieved using a standard SDM approach: Main.xml contains scans and a pointer to a Config Description which contains a pointer to a Data Description which may contain a pointer to an entry in the Pulsar table. If there is no pointer to the Pulsar table in the Data Description, binning mode was not used for that scan.
<row>
<dataDescriptionId>DataDescription_15</dataDescriptionId>
<polOrHoloId>Polarization_0</polOrHoloId>
<spectralWindowId>SpectralWindow_15</spectralWindowId>
</row>
<row>
<dataDescriptionId>DataDescription_16</dataDescriptionId>
<polOrHoloId>Polarization_0</polOrHoloId>
<pulsarId>Pulsar_0</pulsarId> <--- indicates binning mode for the scan
<spectralWindowId>SpectralWindow_0</spectralWindowId>
</row>
Phased-array Observations
Examples: /lustre/aoc/sciops/pdemores/
.cf calibration files
.ar pulsar data files
File set: 18A-210_sb35398245_1_1.58270.41125583333
Associated files:
<file set>.scan_id.subscan_id.IF_name.Index_within_subscan/IF_[.ar | .cf]
18A-210_sb35395090_1_1.58251.80414998843.14.1.AC_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.14.1.BD_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.15.1.AC_0001.ar
18A-210_sb35395090_1_1.58251.80414998843.15.1.AC_0002.ar
18A-210_sb35395090_1_1.58251.80414998843.15.1.AC_0003.ar
18A-210_sb35395090_1_1.58251.80414998843.15.1.AC_0004.ar
18A-210_sb35395090_1_1.58251.80414998843.15.1.BD_0001.ar
18A-210/18A-210_sb35395090_1_1.58251.80414998843.15.1.BD_0002.ar
18A-210/18A-210_sb35395090_1_1.58251.80414998843.15.1.BD_0003.ar
18A-210_sb35395090_1_1.58251.80414998843.15.1.BD_0004.ar
18A-210_sb35395090_1_1.58251.80414998843.16.1.AC_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.16.1.BD_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.27.1.AC_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.27.1.BD_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.28.1.AC_0001.ar
18A-210_sb35395090_1_1.58251.80414998843.28.1.AC_0002.ar
18A-210_sb35395090_1_1.58251.80414998843.28.1.AC_0003.ar
18A-210_sb35395090_1_1.58251.80414998843.28.1.AC_0004.ar
18A-210_sb35395090_1_1.58251.80414998843.28.1.BD_0001.ar
18A-210_sb35395090_1_1.58251.80414998843.28.1.BD_0002.ar
18A-210_sb35395090_1_1.58251.80414998843.28.1.BD_0003.ar
18A-210_sb35395090_1_1.58251.80414998843.28.1.BD_0004.ar
18A-210_sb35395090_1_1.58251.80414998843.29.1.AC_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.29.1.BD_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.30.1.AC_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.30.1.BD_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.3.1.AC_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.3.1.BD_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.41.1.AC_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.41.1.BD_0001.cf
18A-210_sb35395090_1_1.58251.80414998843.42.1.AC_0001.ar
18A-210_sb35395090_1_1.58251.80414998843.42.1.BD_0001.ar
/lustre/aoc/sciops/pdemores/18A-210/18A-210_sb35395090_1_1.58251.80414998843.43.1.AC_0001.cf
/lustre/aoc/sciops/pdemores/18A-210/18A-210_sb35395090_1_1.58251.80414998843.43.1.BD_0001.cf
/lustre/aoc/sciops/pdemores/18A-210/18A-210_sb35395090_1_1.58251.80414998843.54.1.AC_0001.cf
/lustre/aoc/sciops/pdemores/18A-210/18A-210_sb35395090_1_1.58251.80414998843.54.1.BD_0001.cf
/lustre/aoc/sciops/pdemores/18A-210/18A-210_sb35395090_1_1.58251.80414998843.55.1.AC_0001.ar
/lustre/aoc/sciops/pdemores/18A-210/18A-210_sb35395090_1_1.58251.80414998843.55.1.BD_0001.ar
/lustre/aoc/sciops/pdemores/18A-210/18A-210_sb35395090_1_1.58251.80414998843.56.1.AC_0001.cf
/lustre/aoc/sciops/pdemores/18A-210/18A-210_sb35395090_1_1.58251.80414998843.56.1.BD_0001.cf
Metadata
For the PSRFITS files:
| Observing Mode | hdu['PRIMARY'].header['OBS_MODE'] |
| Number of bins | hdu['SUBINT'].header['NBIN'] |
| Time resolution | |
| Number of channels | hdu['SUBINT'].header['NCHAN'] |
| Number of polarization products | hdu['SUBINT'].header['NPOL'] |
Notes
It is possible for an observation to use 'mixed-modes'. Some scans could use binning mode and other scans could use phased-array mode.