As part of the MWAX new correlator development and testing, an observation was taken using both the MWAX correlator and the existing MWA correlator.
Obs ID: 1244973688
View MWA Correlator observation info
View Receiver PPDs
MWA and MWAX correlator mode:
- Frequency averaging: 10 kHz
- Integration time: 1 second
Even though the array was in long baseline mode, we decided to take the observation in a mode which both correlators support. MWA normally runs at 0.5 sec integration time, however MWAX supports 0.4 or 0.6 seconds. So it was decided in the interest of comparing like with like to run both at the next best setting they have in common: 1 second integration times.
- MWA: 120 seconds
- MWAX: first 40 seconds
MWAX Corrections Applied: None
- No cable length corrections (this feature will be implemented soon and will be controlled by a flag in the metafits)
- No geometric corrections (this feature will be implemented soon and will be controlled by a flag in the metafits)
- No digital gain correction (this feature will be implemented soon and will be controlled by a flag in the metafits)
- No bandpass corrections
Channel selection comparison:
|Receiver Channel #||MWA Coarse Channel #||MWAX Coarse Channel #|
Download MWA observation via MWA ASVO: click here (24 coarse channels, metafits)
Download MWAX data: click here (6 coarse channel fits files and a 'doctored metafits to be consistent with 6 coarse channels and only 40 second duration)
Receiver / Tile health:
Tiles from rec03 (112-119) produced no data in this observation for MWAX.
Tiles from rec16 (64-71) produced no data in this observation for MWAX.
Also note that tile 72 produced no data in this observation for MWAX.
The new MWAX correlator was only configured to capture the first 40 seconds of this observation (the MWA correlator would have 120 seconds) and only 6 coarse channels (the equivalent of MWA gpubox09,10,11,12,13,14).
See the following articles for information on ordering of data and fits format:
MWAX Visibility File Format
MWAX Antenna Ordering