[daip] Averaging pairs of IFs in AIPS

[Amy Mioduszewski]

Hi Steve,

I cannot think of anything that will average IFs independently inside a dataset. 
   Eric is away and he might know something that I don't.  You could try to 
VBGLU the data back together rather than DBCONing, that would "stitch" the back 
together, rather than creating different subarrays.

Amy

Steven Tremblay wrote:
> Hello,
> 
> I'm currently reducing 15 GHz VLBA data which has 4 IFs, organized in 
> two pairs (adjacent IFs) with 438 MHz of separation between the pairs. 
> We'd like to average up the adjacent pairs to reduce the baseline noise, 
> since we have low S/N for many of our observed sources,  so that we are 
> left with two IFs separated by 438 MHz. We have not been able to find a 
> way to do this directly (such as using AVSPC which seems like it should 
> do this), instead we've been left with cumbersomely splitting out two 
> files for each source, averaging the appropriate pair in each 
> single-source file, then using DBCON to join them together as different 
> arrays. The largest problem we have with this method is that the any 
> editing after this point won't automatically span the IFs.
> 
> Please let me know if we are missing a way to average subsets of the IFs.
> 
> Thanks,
> -Steve Tremblay-
> 
> ---------------------------------------------------------------
> Steven Tremblay
> Department of Physics and Astronomy
> University of New Mexico
> 505.277.2449
> tremblay at unm.edu <mailto:tremblay at unm.edu>
> 
> 
> 
> 
> 
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