[IGSSTATION-3161]: PRDS: Clock switch maser --> internal

[Donahue, Brian]

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IGS Station Mail          26 Jun 06:42:36 PDT 2009      Message Number 3161
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Author: Brian Donahue

ADVISORY: Please be advised that the MASER at station PRDS lost lock
around 14ut on June 25th.  The receiver was switched to run off the
internal crystal around 13:30ut on June 26th.