[daip] Re: CVEL accuracy ?

[Eric Greisen]

Nissim Kanekar writes:

 > I've been using the AIPS task CVEL to carry out offline Doppler tracking 
 > of my WSRT data and wanted to ask about the accuracy of the code in 
 > computing velocities. This is essentially because I'm doing a comparison 
 > between the redshifts of two spectral lines to try to measure changes in 
 > fundamental constants; we're getting down to an accuracy of ~ 0.2 km/s 
 > in measuring the velocity of the peaks of the lines and I was wondering 
 > whether we might soon be limited by CVEL's accuracy.
 > 

I cannot be sure what the accuracy of the task would be.  Since it is
important to you, I suggest that you check on it.  The program is
found at

    /home/AIPS/31DEC05/Q/PGM/NOTST/CVEL.FOR

Eric Greisen