NPLC Site Information Form
     GPS/GLONASS Campaign IGEX98


0.   Form

     Prepared by (full name)  : Mr Jon Clarke
     Date Prepared            : 06-APR-1999
     Report Type              : UPDATE
     Prepared Using           : Programmer's File Editor


1.   Site Identification of the GPS/GLONASS Monument

     Site Name                : Teddington
     Four Character ID        : NPLC
     Monument Inscription     : NPLC
     IERS DOMES Number        : 13234M001
     CDP Number               : (XXXX)
     Monument Description     : Top of Aluminium pole
     Date Installed           : 21-OCT-1998 (hh:mm UT)
     Geologic Characteristic  : (BEDROCK/CLAY/CONGLOMERATE/GRAVEL/SAND/etc)
       Bedrock Type           : (IGNEOUS/METAMORPHIC/SEDIMENTARY)
       Bedrock Condition      : (FRESH/JOINTED/WEATHERED)
       Fracture Spacing       : (1-10 cm/10-50 cm/50-200 cm/over 200 cm)
       Notes                  : (multiple lines)
     Additional Information   : Pole is mounted at the South East corner of the 
                                liftshaft on Building 2. Currently it is the
                                mounting for our R100 Glonass/GPS antenna.


2.   Site Location Information

     City or Town             : Teddington
     State or Province        : Greater London
     Country                  : United Kingdom
     Tectonic Plate           : Eurasion
     Approximate Position
       X coordinate (m)       : 3985504.30
       Y coordinate (m)       : -23626.80
       Z coordinate (m)       : 4962939.10
       Latitude (deg)         : ( dd.dddd N/S)
       Longitude (deg)        : (ddd.dddd E/W)
       Elevation (m)          : (m)
     Additional Information   : Co-ords supplied by Wolfgang Soehne, GFZ, 
                                using IGEX98 data.


3.   Receiver Information

3.1  Receiver Type            : 3SNAV R100-40T
     Satellite System         : GPS+GLONASS
     Serial Number            : 0015
     Firmware Version         : 
     Date Installed           : 21-Oct-1998 14:29 UT
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : (multiple lines)

3.x  Receiver Type            :
     Satellite System         : (GPS/GLONASS/GPS+GLONASS)
     Serial Number            :
     Firmware Version         :
     Date Installed           : (dd-MMM-yyyy hh:mm UT)
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : (multiple lines)


4.   Antenna Information

4.1  Antenna Type             : TECOM 3S W/O CR
     Serial Number            : 049
     Antenna Height (m)       : 0.010
     Antenna Reference Point  : ARP
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 21-Oct-1998 14:29 UT
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : Antenna mounting is a 10mm thick plate 
                                above the end of the pole. Antenna part no.
                                401163-13.

4.x  Antenna Type             :
     Serial Number            :
     Antenna Height (m)       : (m)
     Antenna Reference Point  : (ARP/BCR/BPA)
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : (dd-MMM-yyyy hh:mm UT)
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : (multiple lines)


5.   Local Site Ties

5.x  Monument Name            :
     Site Ref CDP Number      : (XXXX)
     Site Ref Domes Number    : (XXXXXXXXX)
     Differential Components from GPS/GLONASS Marker to Site Reference (ITRS)
       dx (m)                 : (m)
       dy (m)                 : (m)
       dz (m)                 : (m)
     Accuracy (mm)            : (mm)
     Date Measured            : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : (multiple lines)


6.   Frequency Standard

6.1  Standard Type            : H-MASER
       Frequency              : 10 MHz
       Effective Dates        : 21-Oct-1998 (- dd-MMM-yyyy)
       Notes                  : This is HM1, a Sigma Tau active H maser.
                                It is the source of UTC(NPL), delayed by 
                                8453 ns (measured on 1999-03-05). 
                                Port C4 of distr. amp. id 182.

6.x  Standard Type            : (H-MASER/CESIUM/QUARTZ/INTERNAL/RUBIDIUM)
       Frequency              :
       Effective Dates        : (dd-MMM-yyyy - dd-MMM-yyyy)
       Notes                  : (multiple lines)


7.   Collocation Information

7.1  Instrumentation Type     : GPS
       Status                 : PERMANENT
       Effective Dates        : 21-Oct-1998 (- dd-MMM-yyyy)
       Notes                  : Ashtech Z12T, NPLB, dual frequency geodetic 
                                receiver.

7.2  Instrumentation Type     : TWSTFT
       Status                 : PERMANENT
       Effective Dates        : 21-Oct-1998 (- dd-MMM-yyyy)
       Notes                  : Two-way satellite time and frequency transfer 
                                earth station.

7.3  Instrumentation Type     : GPS
       Status                 : PERMANENT
       Effective Dates        : 21-Oct-1998 (- dd-MMM-yyyy)
       Notes                  : Allen Osborne Associates TTR4P dual frequency
                                geodetic receiver.

7.4  Instrumentation Type     : GPS
       Status                 : PERMANENT
       Effective Dates        : 21-Oct-1998 (- dd-MMM-yyyy)
       Notes                  : Three Allen Osborne Associates TTR5 for BIPM 
                                common view time transfer.

7.x  Instrumentation Type     : (GPS/GLONASS/DORIS/PRARE/SLR/VLBI)
       Status                 : (PERMANENT/MOBILE)
       Effective Dates        : (dd-MMM-yyyy - dd-MMM-yyyy)
       Notes                  : (multiple lines)


8.   Meteorological Instrumentation

8.1  Humidity Sensor Model    :
       Manufacturer           :
       Data Frequency         :
       Accuracy (% rel h)     : (% rel h)
       Effective Dates        : (dd-MMM-yyyy - dd-MMM-yyyy)
       Notes                  : (multiple lines)

8.2  Pressure Sensor Model    :
       Manufacturer           :
       Data Frequency         :
       Accuracy (mbar)        : (mbar)
       Height Diff to Ant (m) : (m)
       Effective Dates        : (dd-MMM-yyyy - dd-MMM-yyyy)
       Notes                  : (multiple lines)

8.3  Temperature Sensor Model :
       Manufacturer           :
       Data Frequency         :
       Accuracy (deg C)       : (deg C)
       Effective Dates        : (dd-MMM-yyyy - dd-MMM-yyyy)
       Notes                  : (multiple lines)

8.4  Water Vapor Radiometer   :
       Manufacturer           :
       Distance to Antenna (m): (m)
       Elev Diff to Ant (m)   : (m)
       Effective Dates        : (dd-MMM-yyyy - dd-MMM-yyyy)
       Notes                  : (multiple lines)

8.5  Other Instrumentation    : (multiple lines)


9.   On-Site, Point of Contact Agency Information

     Agency                   : National Physical Laboratory
     Mailing Address          : NPL, Queens Road, Teddington,
                                Middlesex, TW11 0LW, UK.
     Primary Contact
       Contact Name           : Mr Jon Clarke
       Telephone (primary)    : +44 (0) 181 943 6548
       Telephone (secondary)  : +44 (0) 181 943 6351
       Fax                    : +44 (0) 181 943 7138
       E-mail                 : jdc@npl.co.uk
     Secondary Contact
       Contact Name           : Dr John Davis
       Telephone (primary)    : +44 (0) 181 943 7137
       Telephone (secondary)  : +44 (0) 181 943 6351
       Fax                    : +44 (0) 181 943 7138
       E-mail                 : jad@npl.co.uk
     Additional Information   : (multiple lines)


10.  Responsible Agency (if different from 9.)

     Agency                   : (multiple lines)
     Mailing Address          : (multiple lines)
     Primary Contact
       Contact Name           :
       Telephone (primary)    :
       Telephone (secondary)  :
       Fax                    :
       E-mail                 :
     Secondary Contact
       Contact Name           :
       Telephone (primary)    :
       Telephone (secondary)  :
       Fax                    :
       E-mail                 :
     Additional Information   : (multiple lines)


11.  More Information

     URL for More Information :
     Hardcopy on File
       Site Map               : (Y)
       Site Diagram           : (Y)
       Horizon Mask           : (Y)
       Monument Description   : (Y)
       Site Pictures          : (Y)
     Additional Information   : (multiple lines)
     Antenna Graphics with Dimensions

            3sNavigation: TECOM 3S W/O CR

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12.  Local Events Possibly Affecting Computed Position

12.x  Date                    : (dd-MMM-yyyy hh:mm UT)
      Event                   : (multiple lines)