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Change of observing setup may cause bad integrations. In the SMA
observations, occasionally after the source change, bad correlations
may be generated in the first integrations before the instrument
is correctly settled. If this occurs, SMA users may use
Miriad task qvack
to flag the bad correlations, e.g.
qvack% inp
Task: qvack
vis = gc_rx1.lsb.tsys % uv file
select =
interval = 0.5 % time interval for which the
data are flagged after a
setup change
force =
options =
mode = source % a change in the source observed
Jun-Hui Zhao (miriad for SMA)
2012-07-09