[daip] TIMERAN feature in FILLM
Eric Greisen
egreisen at nrao.edu
Fri Aug 7 22:22:16 EDT 2009
Claire Chandler wrote:
> I have been using TIMERAN to specify a particular timerange to load from a
> VLA archive file, located at /users/vrivilla/AJ356/DATA/AJ356_H090317.xp1.
> When I use
>
> TIMERAN 0 0 0 0 0 14 30 0
>
> I find that the last visibility, with a time stamp of 0/14:29:58 according
> to LISTR, is missing. When I load the data with
>
> TIMERAN 0 14 30 0 1 0
>
> I find that the visibility with a time stamp of 0/14:29:58 is selected.
> Is this something to do with FILLM adding half an integration to the times
> loaded?
FillM subtracts half an integration time - not adds. I bet that the
time stamp on the data them selves (the end of the integration) was
microscopically larger than your stop time althoughaips would then mark
it with the correct center time. I guess I should add a fudge factor...
Eric
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