[daip] [!3921]: aips - ALVAR

[Lynn D Matthews]

Lynn D Matthews updated #3921
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              Status: Open (was: Closed)

ALVAR
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           Ticket ID: 3921
                 URL: https://help.nrao.edu/staff/index.php?/Tickets/Ticket/View/3921
           Full Name: Lynn D Matthews
               Email: lmatthew at haystack.mit.edu
             Creator: User
          Department: AIPS Data Processing
       Staff (Owner): Eric Greisen
                Type: Issue
              Status: Open
            Priority: Default
      Template Group: Default
             Created: 26 September 2013 03:08 PM
             Updated: 01 October 2013 05:14 PM



I have been doing some analysis of phase stability timescales with ALMA test data and decided to explore whether ALVAR could provide another useful tool for characterizing the data. (Also, I liked the name). I recognize that being ALMA, this is off-label use.

These data sets often have a sequence of relatively short scans on a source with gaps in-between (e.g., cycles of one-minute on, four minutes off). As I understand from your response, this could indeed be risky if one is exploring timescales shorter than the interscan gap (unless one uses TIMERANG to isolate single scans). 

Regarding DOCRT, DOCRT=-3 was what I had been using (and produced the short header followed by blank line). In general I do like keeping the short headers (which a fortran read can ignore), just not the blank in this particular case.

Lynn

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