[daip] DBCON/IMAGR question
Hanno Spreeuw
spreeuw at astron.nl
Thu Jan 3 06:25:04 EST 2008
Hello, I am trying to determine the correct value for REWEIGHT in DBCON.
I read the DBCON helpfile: 'All AIPS imaging tasks report the "sum of
the gridding weights" in the message file'.
So I ran IMAGR on one of the input datasets for DBCON. This is part of
the message file:
"castor> IMAGR1: UVWAIT: begin finding uniform weights
castor> IMAGR1: UVWAIT: Average grid weight 2.088E+00
castor> IMAGR1: UVWAIT: Adding temperance S 4.175E-01
castor> IMAGR1: UVWAIT: begin applying uniform or other weights
castor> IMAGR1: UVWAIT: Sum of weights in 2.413E+02 and out 3.411E+02
castor> IMAGR1: UVWAIT: Noise is increased by a factor 1.172 due to
weighting
castor> IMAGR1: UVWAIT: Average summed weight 2.088E+00 over 193179
vis".
I guess I should pick either the first (2.413E+02) or the second
(3.411E+02) number.
But I am not sure how to interpret "in" and "out" in this line
"Sum of weights in 2.413E+02 and out 3.411E+02".
Could you please explain?
Thanks,
Hanno Spreeuw.
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