Message-ID: <49CD35BC.7020303@unavco.org>
Date: Fri, 27 Mar 2009 14:23:24 -0600
From: David Maggert <dmaggert@unavco.org>
User-Agent: Thunderbird 2.0.0.19 (Windows/20081209)
To: igsstation@igscb.jpl.nasa.gov
Subject: [IGSSTATION-2959]: SHAO:  external reference clock interruption
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Sender: owner-igsstation
Precedence: bulk

******************************************************************************
IGS Station Mail          27 Mar 13:23:47 PDT 2009      Message Number 2959
******************************************************************************

Author: David Maggert, UNAVCO

Dear Colleagues,

The ASHTECH UZ-12 receiver at the Shanghai Astronomical Observatory, PRC (SHAO) 
station reverted to its internal clock between 2008-09-18 and 2009-03-19.  The 
external 5 MHz H-Maser reference has been locked back on again.  An updated site 
log has been submitted to the IGSCB.

http://igscb.jpl.nasa.gov/igscb/station/log/shao_20090324.log


       Modified/Added Sections : 6.4, 6.5, 6.6

6.4  Standard Type            : EXTERNAL H-MASER
        Input Frequency        : 5 MHz
        Effective Dates        : 2008-06-04/2008-09-18
        Notes                  : Actual start time 2008-06-04T20:31Z
                               : Actual end time 2008-09-18T14:15Z

6.5  Standard Type            : INTERNAL
        Input Frequency        : (if external)
        Effective Dates        : 2008-09-18/2009-03-19
        Notes                  : Actual start time 2008-09-18T14:15Z
                               : Actual end time 2009-03-19T20:35Z

6.6  Standard Type            : EXTERNAL H-MASER
        Input Frequency        : 5 MHz
        Effective Dates        : 2009-03-19/CCYY-MM-DD
        Notes                  : Actual start time 2009-03-19T20:35Z


We apologize for the inconvenience this interruption may have caused.

Maintenance and operations of the SHAO station is a collaborative effort
supported by JPL, UNAVCO, and the Shanghai Astronomical Observatory with funding
provided by NASA's Earth Surface and Interior Focus Area - Science Mission
Directorate.

Best Regards,
David Maggert