[daip] UVFIX IAT,UTC etc

[Leonia Kogan]

UVFIX historically was written exclusively for VLA. to recover some
problem of VLA correlator. In particular UVFIXPRM(13) should be equal
1/2 the integration time (usually 5s because the VLA integration time =
10s)


Later UVFIX was modified adding VLBA and even orbiting VLBI.

For VLBA  UVFIXPRM(12), UVFIXPRM(12) should be equal zero.
You remember correctely.

On the other hand I do not know why do people (in particular you) want
to recaculate UV by UVFIX, because the VLBA correlator calculate UV on
the very serious bases.


Leonia
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From: Michael Bietenholz <michael at polaris.phys.yorku.ca>
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Subject: [daip] UVFIX IAT,UTC etc
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Date: Thu, 14 Mar 2002 11:53:11 -0600 (CST)
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If I want to use UVFIX on some VLBI (from Socorro VLBA correlator)
data, do I need to supply it with IAT-UTC?  Should the clock error
(UVFIXPRM(13) be 0 for the VLBA correlator or 1/2 the integration
time?)

(If I remember correctly, data from the VLBA correlator have UTC
time tags, while those from the VLBA correlator have IAT time tags,
so I'm wondering why UVFIX would need to know about IAT at all
for VLBA correlator stuff)

              thanks,                 michael b
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