[evlatests] Modcomp-free: L-Band

[Ken Sowinski]

On Fri, 15 Jun 2007, rperley at nrao.edu wrote:
>
> Some clarification is needed here.
>
> With Modcomps in control, I know from long experience that there are no
> data available while antennas are slewing, as I have always done the test
> with all flags ignored.  Either the correlator is off, or a flag not
> accessible to AIPS has been used (if such a thing exists).
>
> When filling Modcomp-free data, I note I get a continual stream of data
> (with the same flag controls in AIPS turned off), regardless of whether
> the antennas are moving or not.
>
> Something is different between the systems, I claim.

Quite right.  What I was trying to say was that the
Modcomps suppress data during slews; the new system
does not.

The increase in data volume is only of interest if we
store hours of data while the array is stowed, say,
because of wind, but there are other ways to deal with
that.