[evlatests] Phase stability of ea27 {External}

[Rick Perley]

following up on Bryan's point:  The changes were by many tens of degrees 
on a timescale of 10 minutes.  It was stable within the calibrator scan, 
then hopped to an entirely different number 10 minutes later ...

No way a baseline error can do that...

Rick

On 6/30/23 11:04, Bryan Butler wrote:
>
> It's a good point, but that wouldn't cause the behavior that Rick 
> sees. It would cause a diurnal sinusoidal error which got worse with 
> higher frequency, not random amounts for all bands, and changing 
> between scans.  Seems like a loose connection maybe?  But would have 
> to be after the converters.
>
>     -Bryan
>
>
> Catarina Ubach via evlatests wrote on 6/30/23 10:48:
>> Antenna 27 baselines parameters have not been updated.
>>
>> Catarina
>>
>> -----Original Message-----
>> From: evlatests <evlatests-bounces at listmgr.nrao.edu> On Behalf Of 
>> Rick Perley via evlatests
>> Sent: Friday, June 30, 2023 10:09 AM
>> To: evlatests at aoc.nrao.edu
>> Subject: [evlatests] Phase stability of ea27
>>
>>   From data taken last night, it is noted that ea27's phase changes 
>> by large, and seemingly random amounts at all bands observed (L, S, 
>> C, X, and Ku).  This occurs between scans, and is not seen on other 
>> antennas.
>>
>> Rick
>>
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