[daip] Re: Followup to gripe re CALIB time tags in SN tables.

Eric Greisen egreisen at nrao.edu
Tue Jun 20 12:06:16 EDT 2000


The CALIB (and FRING problems are caused by a round-off added to the
scan interval to handle the inexactness of times.  CALIB claimed to
add 2 sec but actually added 4.3 or so.  FRING claimed to add 2 but
actually added 1.  I will change both to 0.1.  The messages below came
first from the corrected and 2nd from the old version:

tigua > CALIB1: Determining solutions
tigua > CALIB1: Writing SN table    9
tigua > CALIB1: Found         2200 good solutions
tigua > CALIB1: Failed on       61 solutions
tigua > CALIB1:                  1 solutions had insufficient data

tigua > CALIB1: Determining solutions
tigua > CALIB1: Writing SN table   10
tigua > CALIB1: Found         3613 good solutions
tigua > CALIB1: Failed on      688 solutions
tigua > CALIB1:                159 solutions had insufficient data

Thanks for following this up.  The real trouble stems from the very
short time you had between scans plus the bad roundoffs.

Eric



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