From jimr Sun Sep 13 15:50:11 EDT 1998
Received: (from jimr@localhost)
	by maia.usno.navy.mil (8.8.6 (PHNE_14041)/8.8.6) id PAA00300;
	Sun, 13 Sep 1998 15:50:11 -0400 (EDT)
From: Jim Ray (USNO 202-762-1444) 
Message-Id: <199809131950.PAA00300@maia.usno.navy.mil>
Subject: FAIR clock ???
To: dstowers@jpl.nasa.gov (Dave Stowers (JPL))
Date: Sun, 13 Sep 1998 15:50:11 EDT
Cc: steese@icefog.gcgo.nasa.gov (GCGO), jimr@maia.usno.navy.mil
X-Mailer: Elm [revision: 212.4]
Status: RO

At about noon UTC on 10 Sept. 1998, the performance of the FAIR GPS data
changed character abruptly, as though the frequency standard had been
changed from the H-maser to the internal crystal.  (For the 1st half of
that day there was no data.)  

Can you confirm whether there was any change in the frequency standard
used as reference for the FAIR receiver?  I ask in the context of the
IGS/BIPM timing project (http://maia.usno.navy.mil/gpst.html) and FAIR
is one of the stations we have been planning to use as a "fiducial
clock" station.

Thanks,
--Jim


From steese@icefog.gcgo.nasa.gov Mon Sep 14 11:45:23 EDT 1998
Received: from icefog.gcgo.nasa.gov. (icefog.gcgo.nasa.gov [192.70.244.1])
	by maia.usno.navy.mil (8.8.6 (PHNE_14041)/8.8.6) with SMTP id LAA01596
	for ; Mon, 14 Sep 1998 11:45:21 -0400 (EDT)
Date: Mon, 14 Sep 98 15:36:32 utc
Message-Id: <26097@icefog.gcgo.nasa.gov>
From: steese@icefog.gcgo.nasa.gov (Gilmore Creek Geophysical Observatory)
Reply-To: steese@icefog.gcgo.nasa.gov
To: jimr@maia.usno.navy.mil
Subject: Re: FAIR clock?
Status: RO

Jim - The Maser freq. standard was taken down for maintenance about that
time frame. The Rogue was later switched to internal reference.
At this time the maser is repaired but not reinstalled in its thermal
chamber. As soon as this is done we will switch the rogue back to the
maser as reference.

Steve @ Gilmore Creek GO