[daip] UVCON error message

[Leonia Kogan]

Sean,

I am glad to here that UVCON works.

You wrote:

>Now that I have UVCON running, I must say that it would be especially
>useful if there was at least a trap for APARM(7)=0.0, or even a non-zero
>default value. Likewise for APARM(4,5)=0.

Yes, you are right. I'll add the defaults.

Thanks

Leonid



Sean.Dougherty at nrc-cnrc.gc.ca wrote:

>Leonid,
>
>Thanks for the ideas. With your email, and checking the history of the
>output uv files where I have successfully run uvcon in the past, I see
>that aparm *must* be set carefully - especially aparm(7). If aparm(7)=0.0,
>then the program generates an error message. Also aparm(4,5) are required
>if the user wants to generate any visibilities!
>
>Now that I have UVCON running, I must say that it would be especially
>useful if there was at least a trap for APARM(7)=0.0, or even a non-zero
>default value. Likewise for APARM(4,5)=0. Moreover, the error message that
>aips generates offers no clue to the problem with the input parameters,
>though this fault can be directed at a number of tasks.
>
>Once again, many thanks for your help in getting me out of my mess. In
>hindsight it seems so trivial, most especially since I have run UVCON many
>times in the past - admittedly over 8 months ago.
>
>Thanks
>
>Sean
>PS. My apologies for Leo - I am working currently with a compatriot of
>yours who is also Leonid, but everyone seems to call him Leo. For certain,
>I'll not make the mistake again!
>
>  
>
>>Sean,
>>
>>It is absolutely wrong idea using APARM=0 in UVCON.!
>>
>>APARM(1,2)=0 => wavelength=1mm.  This is fine if actually want 1mm
>>APARM(3) = 0  => the source declination =0. This is fine if actually want
>>0
>>APARM(4,5) = 0 => both min and max hour angles are zero => Time
>>interval=0. I doubt you want it.
>>APARM(6) = 0   => Minimum elevation is 0. This is fine if actually want  0
>>APARM(7) = 0   => Integration time (time separation) is 0 => number of
>>time point (Hmax-Hmin)/APARM(7)+1 is not determined:  0/0+1
>>APARM(8) = 0 => Bandwidth=1MHZ.  It is fine if you actually want !MHz
>>APARM(9) = 0 => Nchan=1. It is fine
>>APARM(10) =0  May be correct but better using 1
>>
>>So use APARM with the values you want., especially APARM(4,5,7).
>>
>>       Still send me the list of all input parameters.
>>       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>>I want to see what do you use specifically at CMETHOD, CMODEL, BCOMP,
>>NCOMP...
>>
>>Is there CC table attached toyour model? If you want to use CC table as
>>the model you have to determine INVERS.
>>
>>So.
>>
>>1. Use the right values for APARM
>>2. Check other parameters as well ( I can give you advise having
>>received the list
>>3. Run UVCON Using model determined at SMODEL (IN2NAME=' ')
>>4. Run UVCON with the actual model but with right inputs:APARM, INVERS
>>BCOMP, NCOMP, CMETHOD, CMODEL,
>>
>>
>>
>>Sean Dougherty wrote:
>>
>>    
>>
>>>Leo,
>>>
>>>The parms I used in UVCON are APARM 0; BPARM -1,0. The rest are just
>>>input related.
>>>
>>>The input model can be found at
>>>ftp://ftp.drao.nrc.ca/pub/smd/wr140_0.02_8.4.fits
>>>
>>>Thanks,
>>>
>>>Sean
>>>
>>>Leonia Kogan wrote:
>>>
>>>      
>>>
>>>>Sean,
>>>>
>>>>As I understand now the problem is not at the output text file
>>>>but at the output UV data file. May be you want to have it too big
>>>>(check APARM(4,5,7,8,9).
>>>>
>>>>Anyway send me the input file you use, UVCON inputs and I look it
>>>>tommorow evening.
>>>>
>>>>Leonia
>>>>
>>>>
>>>>        
>>>>
>>
>>    
>>