VLA Configurations. DanaBalser proposed the following steps below via email. LorantSjouwerman suggested that having the user provide their intent (e.g., high dynamic range image) might be more effective. This would allow the software to direct the questions better. LorantSjouwerman will think more about how to use the intent. We agreed that this "wizard" mode should be more focused on specifying the observations than the data products since the data can always be reprocessed. We also agreed that the basic structure below is reasonable. The main issue is how the novice user might interpret LAS versus FOV.
Specify the target rms.
Specify the frequency.
Specify the spatial resolution. Software displays (per source) the most compact configuration that will achieve the specified spatial resolution. It will also display the min/max spatial resolution and the largest angular scale (LAS).
Ask the user if they require a larger LAS. If so, then display the configurations and corresponding LASs for the more compact configurations and allow them to select one or more.
Specify the field of view (FOV). Let the user know if they have to mosaic and how many fields are required. Provide the integration time per field and the total time.
Spectral Line. We agreed that there is considerable overlap between the information required to specify the resources (e.g., setting up the correlator) and what is necessary for the data products. JeffKern reported that SRDP will need a list of the spectral lines and the line width. This is primarily to be able to flag RFI and to set the frequency range. LorantSjouwerman noted that the software could probably determine these parameters.
Polarization. JeffKern reported that SRDP will initially only consider Stoked I. In terms of Resources they should be able to specify single, dual, or full stokes. Single polarization might be out of scope for SRDP.
Resource Specification. We discussed the ALMA approach which allows users to setup the spectral windows and provides feedback with a nice graphical display. LorantSjouwerman produced a document on a method to guide the user to setup the VLA correlator. He feels this could be used for the VLBA as well. It should also fit into the ALMA model vis-a-vis the graphical display. LorantSjouwerman will send around the document for the committee to review before the next meeting.
Metrics. AnandCrossley has produced a list of metrics to discuss in a future meeting.
LorantSjouwerman will think about more detailed requirements using the intent to specify the VLA configuration(s).
LorantSjouwerman will send around the document on setting up the VLA correlator.
Future Meetings. No meeting next week (21 November 2018). We have four more meetings before the holidays. The plan to converge on setting up the resources and checking the metrics over this time period.