[daip] Missing scan in CL1? {External}

[Arnaud Collioud]

Thanks Eric for these explanations!


Just tried without running INDXR after loading the data with FITLD, and 
it seems to be ok. So my new pipeline looks like: FITLD > ANTAB  > USUBA 
 > INDXR, and I hope I am not loosing data or scans in the way...


A.



Le 14/05/2025 à 18:58, Eric Greisen a écrit :
> The reason that FITLD deletes the CL and NX tables when it discovers a 
> subarray condition is that it cannot correctly determine an NX table.  
> The same is true of INDXR.  INDXR works correctly only after USUBA.  I 
> am guessing that ANTAB will not work without an NX table.  But the 
> logic of USUBA is nasty also (I was never able to debug this task) so 
> running USUBA is really needed at the beginning.
>
> Eric Greisen
>
>
>
>
>
> ------------------------------------------------------------------------
> *From:* Arnaud Collioud <arnaud.collioud at u-bordeaux.fr>
> *Sent:* Wednesday, May 14, 2025 12:33 AM
> *To:* Eric Greisen <egreisen at nrao.edu>; daip <daip at nrao.edu>
> *Subject:* Re: [daip] Missing scan in CL1? {External}
>
> Hello Eric,
>
>
> Indeed, when running FITLD > USUBA > INDXR, I see the CL entry for 
> source 4 subarray 2!
>
>
> What I use to do in my pipeline is:
>
> FITLD > INDXR > ANTAB (to import tsys/gain for non-VLBA stations ; 
> easier to deal there since there is only one subarray) > USUBA > INDXR 
> (to get the subarray info correctly in CL/NX...)
>
>
> I just tried FITLD > INDXR, and the CL entries for source 4 around 
> 17:40 are already gone.
>
>
> Do you know why? Do you recommand to proceed with USUBA the earliest 
> in the processing pipeline?
>
>
> Cheers,
>
> A.
>
>
>
>
>
>
> Le 13/05/2025 à 17:14, Eric Greisen a écrit :
>> I loaded RV158, ran USUBA, and then INDXR.    With CPARM(3)=0.15 and 
>> CPARM(4)=1, INDXR made a CL table with 13127 rows including a great 
>> many for source 4 subarray 2 in the time range 17:38:10 to
>> 17:43:34.   In PRTAB INEXT='CL',rparm 3 1 4 0.1  5 1 2 0.1; should 
>> show a lot in rows  986 - 1532.
>>
>> Cheers,
>>
>>
>>
>> ------------------------------------------------------------------------
>> *From:* Daip <daip-bounces at listmgr.nrao.edu> 
>> <mailto:daip-bounces at listmgr.nrao.edu> on behalf of Arnaud Collioud 
>> via Daip <daip at listmgr.nrao.edu> <mailto:daip at listmgr.nrao.edu>
>> *Sent:* Monday, May 12, 2025 11:24 AM
>> *To:* daip <daip at nrao.edu> <mailto:daip at nrao.edu>
>> *Subject:* [daip] Missing scan in CL1? {External}
>>
>> Hello Eric, Amy,
>>
>> I am analysing the global VLBI session RV158 (VLBA + 8 IVS antennas ; 
>> 24h ; S/X-band ; available at NRAO data archive).
>>
>> I'm looking at the source 0403-132 (#4 in my data), which is in the 
>> index as:
>>
>>        4  0/17:40:52.0  00:05:24.0       4 2         9992     14396
>>
>> (as you can see, I have subarrays in my dataset)
>>
>> For this scan, there is data (checked with VPLOT).
>>
>> However, this scan is NOT in CL1, which was created after loading the 
>> data (FITLD) by runnig INDXR. CL1 was (normally?) updated after 
>> running USUBA by running INDXR again.
>>
>> /How is that possible? Any clue why this scan is not in CL1?/
>>
>> Moreover, I am building SN1 from TY1/GC1, and I have gain amplitude 
>> values for this scan. Is there a way to get this into CL2 (with 
>> CLCAL)? Or since there is not row in CL1 for this scan, no hope to 
>> get it in CL2?
>>
>> Thanks in advance for your help!
>>
>> Best wishes,
>>
>> Arnaud
>>
>>
>>
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