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The diffstop program is meant to make differential fringe
stop calculations. For example, one can correct for the differential
fringe rate caused by an error in time. The usage is
diffstop -i ltafile -t TimeError (s)
The output is a differential fringe corrected ltafile, which can be
processed as usual.
In particular, for GMRT data taken since 1 January 2009,
we advice users to run diffstop setting TimeError = 2 seconds (+2)
which results in a noticeable improvement in the phase stability.
Developed and Posted by JNChengalur