[IGSMAIL-5975]: Maintenance at NGA GPS Monitor Stations osn1 and osn2

[Weingarth Leonard A Mr NGA-SNGR USA CIV]

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IGS Electronic Mail      20 Jul 12:39:30 PDT 2009      Message Number 5975
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Author: Len Weingarth

Dear IGS colleagues,

NGA is performing annual maintenance on our South Korea GPS Monitor
Station (Stations osn1 and osn2).  These  activities will result in data
gaps in the RINEX files supplied to IGS.

Equipment changes will also be made.  The antenna and radome will be
replaced with an ITT Chokering-type antenna and a SCIS Radome.  A
section will be added to the antenna mast to raise the antenna.

NGA will submit an IGS_Mail and an updated station site log detailing
the new serial numbers (ITT Antenna S/N: 103, SCIS Radome S/N: 0387)
when the exact times of datagaps and equipment change are known.

NGA takes care to ensure our product quality.  Please let us know of any
issue with our products.

Kind regards,
Leonard A Weingarth
National Geospatial-Intelligence Agency
Office of GEOINT Sciences, GPS Division
GPS Monitor Station Network Control Center
(314) 676-1396 or -9140 (24x7 Ops); FAX: -3174 DSN: 846-