[evlatests] Antenna slews in AH1004

[Bryan Butler]

not sure which conclusion you mean.  the fact that the script was 
generated by the OPT doesn't affect anything other than the wrap 
calculation, which we're solving now...

	-bryan


David Harland wrote, On 3/8/10 11:12:
> 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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