[evlatests] VLA switch to Rubidium

[Mark J Claussen]

Ken, Jon,

We won't observe VLBI with Y27 until the VLA has a maser.

Mark


On Tue, April 16, 2013 8:14 pm, Ken Kellermann wrote:
> I think Barry is right.  I thought about this after the VLBA discussion
> this afternoon.  Y27 is used only for the most sensitive observations.
> Even at C band long integrations needed for sensitivity will not be
> feasible, and the same probably applies to L band.  Also astrometry would
> be compromised.  It would be a waste of the VLA to use it for VLBI with
> only a Rb lo.  As I understood there will be a replacement in 2 to 3
> weeks, so it would not make much sense to observe with a Rb based lo.
>
>> -----Original Message-----
>> From: evlatests-bounces at nrao.edu [mailto:evlatests-bounces at nrao.edu] On
>> Behalf Of
>> Barry G. Clark
>> Sent: Tuesday, April 16, 2013 10:06 PM
>> To: Terry Cotter
>> Cc: evlatests at aoc.nrao.edu
>> Subject: Re: [evlatests] VLA switch to Rubidium
>>
>> This kills VLBI Y27 at the VLA.
>>
>> > Hi All
>> >
>> > 	We are having Maser problems at the Mauna Kea VLBA site. We will be
>> > switching the VLA to Rubidium tomorrow by the end of the day. The VLA
>> > will be without a Maser until further notice. The maser at the VLA
>> > will
>> > be shipped to North Liberty and the maser at North Liberty will be
>> > shipped to Mauna Kea.
>> >
>> > Terry
>> > _______________________________________________
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>> >
>>
>>
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