[evlatests] Antenna slews in AH1004

[David Harland]

Is that a firm conclusion?

Based on the other emails in this thread, i'll be making changes to the 
script generation code, but i don't see how these changes would have an 
impact on this particular situation.

The script for AH1004 had had a subarray.setWrap(0) ("no preference") on 
each scan. Based on the new code it will have subarray.setWrap(0) on 
only the first scan and will be silent on the matter on all subsequent 
scans (assuming there's been no change by the user in the meantime on 
the issue of wraps). Since Ken indicated that being silent on a scan is 
equivalent to repeating the instruction of the previous scan^, it seems 
to me the behavior will be the same.

Might the differences seen between the OPT-generated script and whatever 
else was run be more a matter of the starting positions & wraps of the 
individual antennas prior to the executions?

^"The way the executor works, once a a wrap hint is supplied it is used 
for every scan thereafter."


Vivek Dhawan wrote:
> I believe I can confirm that this is excited by the OPT-generated
> script: pointing/baselines use a (non-OPT?) dwell-time script and go
> all over the sky, but miss only 1 or 2 scans out of a 100, with little
> difference between antennas.
>
> This behaviour has not changed at all in recent weeks so it is fixable
> in AH1004; Though I am unsure how to edit the scripts myself.
>
> On Fri, March 5, 2010 11:23 pm, Bryan Butler wrote:
> |
> | the OPT definitely allows one to set the wrap if desired.
> |
> | 	-bryan
> |
> |
> | Ken Sowinski wrote, On 3/5/10 17:45:
> |> On Fri, 5 Mar 2010, Vivek Dhawan wrote:
> |>
> |>> I just got done with a cursory look at the C55258.434 (AH1004)
> |>> chunk, it looks good on the targets; but the flux cal scan 1331+3030
> |>> is fringeless on 6 (otherwise good) antennas even though it is 4:15 long
> |>> and most antennas got 1:30 or so dwell time. This should be repeated
> |>> with 1331 adequately scheduled, perhaps by moving it a bit later in the
> |>> schedule
> |>
> |> The fringeless antennas are clearly a wrap problem.  Whether
> |> it is an observer oversight or a loss of information in
> |> script generation I cannot tell.  The OPT allows wrap hints?
> |> The scripts in question had every scan marked as 'dont-care-
> |> about-wrap'.
> |>
> |> I suggest the script generator not include setWrap() calls
> |> unless the observer has supplied an explcit hint to the OPT.
>
>
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