[Note:  This move of the time interval counter was intended to shorten
the cable run from the TurboRogue 1 pps output to the counter, 
resulting in a shift of the monitor data by ~31 ns.  The goal is to
try to restore the quality of the 1 pps monitor data, which became
degraded in changes made around 13 November 1998.  The trigger level
was left unchanged at the 0.5 Volt level set in November.
--Jim Ray]


From Wendy@newton.usno.navy.mil Mon Mar  1 17:45:29 EST 1999
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From: Wendy@newton.usno.navy.mil (wendy king)
Date: Mon, 1 Mar 1999 22:43:19 gmt
To: Jim Ray (USNO 202-762-1444) 
Cc: paul@tsee2.usno.navy.mil, dnm@simon.usno.navy.mil
Subject: Re: degraded 1 pps monitoring for MC3 - USNO
In-Reply-To: <199901221854.NAA06833@maia.usno.navy.mil>
      (Jim Ray (USNO 202-762-1444), Fri, 22 Jan 1999 13:54:21 EST)
Message-Id: <131F89F26F@newton.usno.navy.mil>
Status: RO

We moved the time interval counter into the environmental chamber
so it is next to the receiver.  The move occurred this afternoon,
Monday, March 1, and shows up in the data as follows
  
  
            51238.854178 -454073
            51238.879317 -485083
  
You will notice a few missed readings while things were being moved.
This is the last reading before the move, and the first reading after.
The difference is about 31ns.
  
I will leave it to you to notify other interested parties.
  
Wendy
  
 
  
Wendy King                              U.S. Naval Observatory
Computer Specialist                     Time Service, Bldg 78
Email: wendy@newton.usno.navy.mil       3450 Massachusetts Ave, NW
Fax:   (202) 762-1511                   Washington, DC  20392-5420
Voice: (202) 762-1577                   (UPS/FedEx ZIP  20008)
WWW:   http://tycho.usno.navy.mil