[daip] Averaging pairs of IFs in AIPS

[Steven Tremblay]

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




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