[evlatests] Pointing Gone Wild -- May 2020 Edition

[Dave Parker]

That is a good idea 25 and 18 are both old ACU's

Dave

On 7/2/2020 8:07 AM, Leon Abeyta via evlatests wrote:
> Is this also something that can be sorted between new ACUs and old ACUs, 
> or is that not a factor here?
> 
> Leon
> 
> On 7/2/2020 7:25 AM, Dave Parker via evlatests wrote:
>> When you can get the info from your office I would be interested in 
>> how many of those antennas have had bearing changes and then seed if 
>> we have anything to compare before and after bearing change. I realize 
>> we may not be able to find a lot of before data on many antennas.
>>
>> Dave
>>
>> On 7/1/2020 2:22 PM, Ken Sowinski via evlatests wrote:
>>> On Wed, 1 Jul 2020, rperley via evlatests wrote:
>>>>
>>>> The amplitude of this effect (notably ea25 in the 2020 data, and on 
>>>> ea18 in the 2019 data) suggests that this is a software-driven 
>>>> offset -- the antennas, for whatever reason, were told to move off 
>>>> source. But perhaps somebody can provide an alternate explanation.
>>>
>>> Sure.  Atl east for ea25.  Ever since this antenna had a bearing
>>> replacement years ago we have been struggling to explain anomalous
>>> poiting associated with a particular azimuth.  There is a small Az
>>> range where the pointing changes by about an arc-min, as you say,
>>> mostly in elevation.  ea25 is the best example, but there are other
>>> antennas with similar behavior.  Notes aobut others are in my
>>> inaccessible office.
>>>
>>> Ken
>>>
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