[IGSSTATION-3289]: Antenna changes at osn11 osn2, bhr1 bhr2, qui1 qui2

[Weingarth Leonard A Mr NGA-SNGR USA CIV]

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IGS Station Mail          02 Sep 14:22:22 PDT 2009      Message Number 3289
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Author: Len Weingarth

 Dear IGS colleagues,

During annual maintenance activities at NGA GPS monitor stations in
Osan, South Korea, Quito, Ecuador, and Manama, Bahrain, the antennas and
towers were replaced.

At South Korea and Ecuador the Ashtech chokering antennas were replaced
with ITT chokering antennas with scis radomes.

AT Bahrain the Ashtech chokering antenna was replaced with a new Ashtech
chokering antenna with scis radome.

These antenna/radome configurations are not calibrated to IGS standards.
Accordingly, uploads from these stations to IGS have been temporarily
halted.

The antenna/radome combinations are awaiting calibration, and upon the
completion of the calibration, new DOMES numbers/station names will be
requested and new site logs will be uploaded to IGS.

Some data was uploaded to IGS in error after the antenna configurations
were changed.  Please delete or ignore data after the following times
for the following stations:

stations:

osn1, osn2   JD 204   Rinex file time 09 07 23 15 33 30.0
qui1, qui2   JD 214   Rinex file time 09 08 02 21 42 30.0
bhr1, bhr2   JD 238   Rinex file time 09 08 26 02 08 30.0

When the antenna calibrations are completed, NGA will resume uploading
all stations to IGS, including all older files.

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-