[daip] questions about rflag and flag tables

[Frazer Owen]

     Susan,

     How old a version of AIPS are you using ? Have you run the latest 
midnight job ?

     I believe I remember something in the last few weeks that Eric did 
to RFLAG to improve the flag handling for multiple sources. In any case, 
when talking with Eric, I would make sure I had the lastest version.

---Frazer

On 7/20/12 11:34 AM, Amy Mioduszewski wrote:
> Hi Susan,
>
> Eris is away on a brief vacation (back on Monday), lets see if I can 
> answer your questions.  Here is how FLAGVER and OUTFGVER are supposed 
> to work:
> 1-flagver=xx and outfgver=0 will mean that xx is applied to the data 
> and copied to table yy and new flags are appended to yy.
> 2-flagver=xx and outfgver=yy then the new flags are appended to yy but 
> nothing is copied from xx.  This should do what you want because all 
> the flags from xx have already been copied to yy in #1.  (The question 
> is why do it this way since xx has already been copied to yy, my only 
> thought is that you don't want an infinite number of FG tables?  What 
> I would do just because it is simpler is the first time I ran RFLAG I 
> would set flagver=xx and after than just set flagver=0 and outfgver=0, 
> this would just keep copying flavger to outfgver and appending more 
> flags every time RFLAG is run.)
>
> Anyway, you should not have to create a new flag table to get the new 
> flags. However I am looking at the documentation for OUTFGVER rather 
> than what is actually done in RFLAG.
>
> To prove that it is not appending the new flags, do a PRTAB on the FG 
> table and see if you are missing the flags for the second source.  I 
> assume RFLAG has some sort of RFLAG reason (i.e., the REASON in the FG 
> table will start with "RFLAG") so you should be able to tell where the 
> flags in the FG table come from.
>
> Amy
>
> Susan Neff wrote:
>> Hi Eric,
>>
>> I have a question about RFLAG and flag tables.
>>
>> What I am doing is as follows:
>> The first time I run RFLAG, I give it
>> flagver = xx, outfgver = 0,
>> so it will create a new flag table by
>> copying flagver xx and then adding to it.
>> I run rflag on a subset of sources,
>> creating new flag table yy.
>> Then I try running rflag again on
>> different sources, using flagver = xx
>> and outfgver = yy.
>>
>> What happens to the flags created in the
>> run on the second source??
>>
>> I'm asking because it seems that the flags
>> produced for the second source are not making
>> it into the flag table.  The output plots
>> I get by running with doplot = -12 look
>> like it got the flags, and the noise
>> and scut returned adverbs look like
>> they got the flags.  However, if I try to
>> run another round of rflag, on the second
>> source, using flagtable yy,  I get
>> the same starting noise and scut values
>> as I had in the first run on the second
>> source... not lower values as I would expect.
>> (A second run on the first source behaves
>> as I expect - i.e. the second run returns
>> much lower values for noise(i) and scut(i).
>>
>> I'm wondering if the flags for the
>> second sources are not
>> actually making it into the output
>> flag table ( if it is specified, as opposed
>> to being set to zero and therefore
>> creating a new table).  I had
>> thought they would be added into
>> the flag table created with the first source, but
>> now I'm wondering if I have misinterpreted
>> what is happening.
>>
>> Do I always need to create a new flag
>> table to capture the the newly created
>> flags?  And if I create a new flag table,
>> using only some of the sources, does
>> it carry along the flags for all sources?
>>
>> Thanks for any insight you can provide,
>> -s-
>>
>> _______________________________________________
>> Daip mailing list
>> Daip at listmgr.cv.nrao.edu
>> http://listmgr.cv.nrao.edu/mailman/listinfo/daip
>>