[daip] forwarded message from Tim BASTIAN

Eric Greisen egreisen at nrao.edu
Mon May 8 11:21:47 EDT 2000


For discussion?

E
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From: Tim BASTIAN <bastian at vestale.obspm.fr>
To: Eric Greisen <egreisen at NRAO.EDU>
Subject: Re: multi freq support in AIPS
Date: Mon, 8 May 2000 14:20:15 +0200

Hi Eric,

The OVRO solar array will produce no more than 21 baselines, 86 freqs, 
and two pol'ns (I & V). It's a continuum instrument, so no spectral
line channels. Bumping the number of IFs supported to something .ge. 86
should be sufficient. Thanks.  Tim 

> The limit on number of IFs is currently 28.  I do not know what the
> cost of increasing this will be - probably serious.  If we do not have
> to change the MAXCIF parameter (= max product of #polarizations X
> #spectral channels X #IFs) then the cost will not be too severe.  If
> MAXCIF (current 16384) has to increase, the cost in memory is nasty.
> 
> Let me know what the parameters of their system are - the IF structure
> is a natural for the part you mention.
> 
> Eric
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