[IGSSTATION-3254]: MCM4: external Rubidium frequency off

[David Maggert]

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IGS Station Mail          12 Aug 06:13:19 PDT 2009      Message Number 3254
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Author: David Maggert, UNAVCO

Dear Colleagues,

The McMurdo, Ross Island (MCM4) station has had a failure of the external 
Rubidium frequency standard on July 30th.  The receiver was configured to steer 
internally until the Rubidium problems can be resolved.  We have been 
troubleshooting brief hourly outages at MCM4 starting on July 2nd, however, 
those tracking problems appear to be related to the failure of the Rubidium as 
they disappeared when the receiver was configured to steer internally.  An 
updated site log has been submitted to the IGSCB.


       Modified/Added Sections : 6.2, 6.3


6.2  Standard Type            : RUBIDIUM
        Input Frequency        : 5 MHz
        Effective Dates        : 2000-01-30/2009-07-30
        Notes                  : (multiple lines)

6.3  Standard Type            : INTERNAL
        Input Frequency        : (if external)
        Effective Dates        : 2009-07-30/CCYY-MM-DD
        Notes                  : (multiple lines)


Maintenance and operations of the MCM4 station is a collaborative effort 
supported by JPL and UNAVCO with funding provided by NASA's Earth Surface and 
Interior Focus Area - Science Mission Directorate.

Best Regards,
David Maggert