[daip] Polarisation code for Nasmyth & EW antennae

[Eric Greisen]

Richard Dodson wrote:
> Hi Eric,
> 
>  You might recall that I promised to check out the new AIPS code I had
> written, and then send it to you.
> 
>  It has taken an age to get data I could use for the tests. Well Yebes
> observed in May and the LBA in March. I have reduced those data and am
> happy with the results.
> 
>   Therefore I think it is reasonable to release the code. I wonder if
> we could ask for people to be careful with it -- and perhaps share the
> calibration data with me, so I can continue to check that all is
> behaving as expected?
> 
>   I have updated the code for the latest distribution, and attach it
> with the new files (only 6 -- mostly with very minor changes) and the
> originals from which I worked.
> 
>  I have tested the core changes extensivily (for very many details see
> http://www1.oan.es/informes/archivos/IT-OAN-2007-16.pdf) and checked
> that the code compiles and behaves sensibly with this latest version
> of 08 AIPS
> 
>        Richard
I am puting back all the code changes you have requested.  I removed the 
ABS(type) bits and changed PARANG around some.  Note - you seem to think 
that AIPS/ATNF parallactic angle is a different sign than the text you 
quote.  But, the text formulation allows parallactic angles from -90 to 
+90.  The code goes from -180 to +180.  The sign in the text you quote 
is irrelevant so long as the numerator and denominator have a similar sign.

Anyway, thanks.  A MNJ tomorrow will update the code for you to check 
it.  I also fixed NEWPARMS and added the ATLOD adverbs to NEWPARMS and 
to POPSDAT.

Cheers,

Eric Greisen