[daip] SETJY

[Andreas Brunthaler]

Eric,

If I use the 2011 version, and the velocity of 18 km/s, I get the line where it should be.

Andreas



Eric Greisen <egreisen at nrao.edu> schrieb:
>Andreas Brunthaler wrote:
>> Dear Eric,
>> 
>> I hope you are all back at work now in Socorro. I'm having some
>problems 
>> with the velocity calculation in SETJY. I compared the results I get 
>> when using the 31DEC2011 and the 31DEC2013 versions and get different
>
>> results for the same input parameters.
>
>I have been studying the code and have concluded that the 31DEC11 
>version had very minor errors in the radio computation for optyp ' '
>while 31DEC13 needs to add the SYSVEL provided by the user.  Note that 
>SETJY has been confused by the meaning of SYSVEL and APARM(1) - I am 
>adding a new adverb to say to which IF these adverb values apply.  In 
>general, doing 1 IF at a time is the only meaningful thing with this 
>operation.
>
>The issue with VCAL is more disturbing.  That OPTYPE ignores SYSVEL and
>
>  APARM(1) as well as ZEROSP.  It would be tempting to say that your 
>velocities are not right - but that does not explain the large shift 
>that CVEL does.  I coded SETJY to look exactly like CVEL so this should
>
>not happen.  I need to look more.
>
>Eric

--
   \___________________________________________________________

  Andreas Brunthaler
  Max-Planck-Institut für Radioastronomie

  Auf dem Hügel 69         Tel.   : +49-228-525-377
  53121 Bonn                   email : brunthal at mpifr-bonn.mpg.de
  Germany