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| Key | Existing Value | Set To | Notes | |||
|---|---|---|---|---|---|---|
| MODE | MWAX_VCS | MWAX_CORRELATOR | Required | |||
| INT_TIME_MSEC | a default set by the M&C system | 250-8000 | This is the correlator integration time (in ms) | |||
| FINE_CHAN_WIDTH_HZ | a default set by the M&C system | 200-1280000 | This is the correlator frequency resolution (in Hz). E.g. 10000 would be 10 kHz. | |||
| FSCRUNCH_FACTOR | a default set by the M&C system | 1-6400 | The number of 200 Hz ultrafine channels to scrunch together into a fine channel. E.g. for 10 kHz fine channels set this to 50 | |||
| FINENFINE_CHAN_WIDTH_HZ | a default set by the M&C system | 2001-12806400 | Redundant info but must be compatible with the FSCRUNCH_FACTOR and FINE_CHAN_WIDTH_HZ. E.g. 10000 128 for 10kHz fine channel widthchannels | |||
| NFINEEXPOSURE_CHAN | a default set by the M&C system | 1-6400 | Redundant info but must be compatible with FSCRUNCH_FACTOR and FINE_CHAN_WIDTH_HZ. E.g. 128 for 10kHz fine channelsSECS | the duration of the VCS observation | The duration of the correlator observation you want. | Must be in unit of 8 seconds, matching the total number of subfiles you wish to correlate per coarse channel * 8. |
| OBS_ID | The original obs_id of the VCS observation | The first SUBOBS_ID of the data you want to correlate | So if you have a VCS observation and want to correlate only from 80 seconds in, then you need to make OBS_ID==SUBOBS_ID==the gps time at 80 seconds into the VCS obs. | |||
| OBS_OFFSET | The 8 second offset for this subfile for the original VCS observation. | The offset you need for your correlator observation. | The first subfile in your correlator observation should be 0. Next will be 8, and so on. |
See also: MWAX PSRDADA header for more information on the definition of each key within the subfile header.
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