VLA Data Survey: Difference between revisions
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=== Select the appropriate baselines === | === Select the appropriate baselines === | ||
Usually we use the task 'dspec'[ | Usually we use the task 'dspec'[https://github.com/binchensun/suncasa/blob/master/utils/dspec.py] {{de icon}} to make the dynamic spectrum, | ||
== Make the overview image == | == Make the overview image == | ||
Revision as of 03:35, 16 July 2017
This is a step-by-step tutorial for doing VLA solar data survey.
Preparatory Work
Get the visbility data
The first step of the data survey is to get the visbility data of the the event you are focusing on. Always the origrinal data should be in the the dictionary '/srg/data/evla', you can find the folders named by the date of the event.
The casa task 'listobs' can help to check the basic information of the data, to get the better understanding of each casa task, you can both type the task name followed with a question mark( for example, 'listobs?') in the server or directly google 'nrao casa listobs'.
For each casa task(take the listobs as a example), you can type 'tget listobs' and then 'inp' to get and change the input parameters.
Task listobs can tell some basic information, use the 2012 Mar 10 event as a example,
Other information of the event
Make the dynamic spectrum
Select the appropriate baselines
Usually we use the task 'dspec'[1] Template:De icon to make the dynamic spectrum,