[evlatests] Update on Positions; Phase stability; RTP on EA14.

[Rob Long]

Do we need to take a look at the elevation riser on 14 to make sure it 
isn't damaged?

Rob

Doug Gerrard wrote:
> 	No work has been done to the fiber in the last several months, other 
> than normal moves and/or any module swap outs.
> 
> Doug
> 
> Vivek Dhawan wrote:
> 
>>1. EA 14, 16, and 24 moved last week. Two baseline runs were
>>    done on Saturday, and positions could be found for all EVLA
>>    antennas including 17.
>>
>>2. Residual phase changes with elevation are +_1 radian on
>>    the older antennas 13,14,16, and even less on the newer
>>    23, 24, 26, 17. (All at X band)
>>
>>3. L352 round-trip meters appear to exist at 13,14,18 and two
>>    more unidentified antennas.
>>
>>    mib-1-22 was working, but I  dont know on which antenna.
>>    mib-0-52 was logging at once/min instead of once/10s, and
>>             its reading was unchanging.
>>
>>    The meter on EA14 now changes its response by 5 ps as the
>>    elevation changes on that antenna, and seems to know when
>>    the antenna goes over the top (EL >90). It is the only meter
>>    doing this, it is a new phenomenon, and I noticed it first on
>>    January 10th, i.e. it started before EA14 was moved.
>>    From the monitor data archive, it was present Dec 6th. (I do
>>    not have this monitor point in Oct-Nov). Was the fiber on
>>    EA 14 'fixed' in some way before Dec 6th?
>>    I don't know if the meter is telling the truth, but it seems
>>    to show the diurnal temperature trend correctly.
>>
>>Vivek.
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> 
> 
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