[IGSSTATION-2236]: SYDN External Frequency upgrade [SEC=UNCLASSIFIED]

[Michael.Moore at ga.gov.au]

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IGS Station Mail          30 Apr 16:49:22 PDT 2008      Message Number 2236
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Author: Michael Moore

                  Geoscience Australia
            Australian Regional GPS Network
                  Geodetic Operation

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GPS TRACKER id:   SYDN
DOMES No.         50124M003
CDP No.           N/A
MONUMENT NO.      AU065
LOCATION.         National Measurement Institute
                  Sydeny, NSW
                  AUSTRALIA

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ADVISORY:

Our colleagues from the Length, Time and Optical Standards, at the National
Measurement Institute will be upgrading the external frequency connected to
the Javad receiver at DoY 122 00h00 UTC . We expect there to be short data outage as
the change is made.

The external frequency is being changed to a Symmetricon 5071A caesium beam
frequency standard, with a high performance beam option to help improve the
stability of the clock. 

After the change has been successfully completed, an updated IGS log will be submitted
to the IGSCB detailing the above changes.

Regards
Michael Moore

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Michael Moore
Geoscience Australia 
Telephone: (+61 2) 62499052
Fax: (+61 2) 62499929
Email: Michael.Moore at ga.gov.au
GPO Box 378
Canberra ACT 2601
Australia
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