[daip] DBCON on many files

[Walter Brisken]

Thanks for the update.  I could easily imagine a common area not being 
updated could lead to all sorts of badness.  I'll be ready to give it 
another go tomorrow in 31DEC18.

-W


On Mon, 9 Apr 2018, Eric Greisen wrote:

> On 04/04/2018 07:21 PM, Walter Brisken wrote:
>>
>>  Hi Eric,
>>
>>  DBAPP seems not to be working.  The error I get and the image headers are
>>  shown below.  Note that I've tried various FQTOL values (including -1),
>>  and tried multiple inseq / in2seq values from a string of 13 such files on
>>  disk.  I've also experimented with outname/outclass/outseq being an
>>  existing file or one that is to be created.  Same error message occurs in
>>  any case.  The two data files in the example below can be found in:
>>
>>     /home/parallax/BB388/testfiles
>>
>>  Inputs and error message:
>> 
>> >  inp
>>  AIPS 2: DBAPP     appends one or more uv data sets to the output file
>>  AIPS 2: Adverbs     Values                 Comments
>>  AIPS 2: ----------------------------------------------------------------
>>  AIPS 2: INNAME     'NEP0002'               Input UV file
>>  name (name)
>>  AIPS 2: INCLASS    'V0.1'                  Input UV
>>  file name (class)
>>  AIPS 2: INSEQ        10                    Input
>>  UV file name (seq. #)
>>  AIPS 2: INDISK        5                    Input
>>  UV file disk unit #
>>  AIPS 2: IN2SEQ       10                    Upper
>>  input file seq. #
>>  AIPS 2: OUTNAME    'NEP0002'               Output UV file
>>  name (name)
>>  AIPS 2: OUTCLASS   'V0.1'                  Output UV
>>  file name (class)
>>  AIPS 2: OUTSEQ        9                   
>>  Output UV file name (seq. #)
>>  AIPS 2: OUTDISK       5                    Output
>>  UV file disk unit #.
>>  AIPS 2: FQTOL       100                    > 0
>>  tolerance to not renumber
>>  AIPS
>>  2:                                     
>>  FQs of dataset 2 (in kHz)
>>  AIPS
>>  2:                                   
>>  -1 => no renumbering.
>> >  go
>> DBAPP2:  Task DBAPP  (release of 31DEC18) begins
>> DBAPP2:  NUMBERS OF POINTS ON AXES DO NOT MATCH
>> DBAPP2:  ERROR AROSE WITH INPUT FILE SEQUENCE NUMBER    10
>> DBAPP2:  Purports to die of UNNATURAL causes
>> DBAPP2:  parallax     31DEC18 TST: Cpu=       0.0  
>> DBAPP2:  Real=       0
>>  AIPS 2: Resumes
>> 
>
> i have found several issues:
>
> 1. UT1UTC changes between your 2 files - that was treated as a hard error. 
> Changed it to a warning.
>
> 2. The check on times did not include a time offset, so concluded that the 
> output file came after the input.
>
> 3. But worse - the UV header Common changed some long time ago and the 
> parallel versions of it in DBAPP were not updated.  This trashed the data and 
> could (although not in the case I tested) lead to the error you got.
>
> Will be fixed in 31DEC17 this afternoon, and 31DEC18 after 10 pm tonight.
>
> Eric
>

-- 
-------------------------
Walter Brisken
Director
Long Baseline Observatory
(575)-835-7133 (office)
(505)-234-5912 (cell)