From gblack@virginia.edu Tue Mar 27 18:52:37 2007 Date: Tue, 27 Mar 2007 20:52:16 -0400 From: Greg Black To: "VLBI Observers (Aspen only)" Cc: jromney@nrao.edu Subject: Re: BB243 revised sched files Lisa & all, Thanks, yes I was aware of being over the correlation limit. The setup is such that we actually record the same 2 IFs four times since at some point the low bandwidth we need meant the data rate was too low otherwise. So in fact we will need only 2 IF channels correlated in the end. -Greg >>>>> VLBI Observers <(Aspen only)" > writes: > Hi Greg, > I've looked at your bb243 file and would like to mention > the correlation aspect of this program. The requested > resolution of 1024 spectral channels can only be correlated > for 2 IF channels at a time. This means four correlation > passes will be needed to process all 8 channels. It is not > a problem, but I wanted you to be aware of the special handling > required. If there are any other correlation requests, such as > multiple source position passes for example, it will have to be > done in multiples of four. It could get complicated when the > time comes to reduce the data, so I wanted to give you a > 'heads-up' about that. > Cheers and best of luck, > Lisa Foley > NRAO Data Analyst -------------------------------------------------------------- Greg Black gblack@virginia.edu The University of Virginia Department of Astronomy Phone: (434) 243-8941 P.O. Box 400325 Fax: (434) 924-3104 Charlottesville, VA 22904-4325 Office: Astronomy 263 --------------------------------------------------------------