[evlatests] Pointing Gone Wild -- May 2020 Edition

[Leon Abeyta]

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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