NKLG Site Information Form
     International GPS Service for Geodynamics


0.   Form

     Prepared by (full name)  : Louis Duquesne
     Date Prepared            : 04-APR-2000
     Report Type              : NEW
     Prepared Using           :


1.   Site Identification of the GPS Monument

     Site Name                : N'KOLTANG (GABON)
     Four Character ID        : NKLG
     Monument Inscription     : None 
     IERS DOMES Number        : 32809M002
     CDP Number               : Not assigned
     Date Installed           : 10-FEB-2000 hh:mm UT
     Geologic Characteristic  : 
       Bedrock Type           : 
       Bedrock Condition      : 
       Fracture Spacing       : 
       Notes                  : (multiple lines)
     Additional Information   : Monument : brass mark in a concrete 
block Antenna
                                       : supported by a guyed 3 meter 
tower

                                      
2.   Site Location Information

     City or Town             : Libreville
     State or Province        :
     Country                  : Gabon
     Tectonic Plate           : 
     Approximate Position
       X coordinate (m)       : 6287385.872 m
       Y coordinate (m)       : 1071574.413 m
       Z coordinate (m)       : 39132.764 m
       Latitude (deg)         : 0.35234 N
       Longitude (deg)        : 9.6698 E
       Elevation (m)          : 31.387 m
     Additional Information   : Station located in the permise
                              : of  Ariane tracking station 


3.   GPS Receiver Information

3.1  Receiver Type            : TRIMBLE 4000SSI
     Serial Number            : 3919A25765
     Firmware Version         : 7.29
     Date Installed           : 10-FEB-2000 hh:mm UT
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : (multiple lines)



4.   GPS Antenna Information

4.1  Antenna Type             : TRM29659.00

     Serial Number            : 0220160506
     Antenna Height (m)       : 3.109m
     Antenna Reference Point  : ARP
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 10-FEB-2000 hh:mm UT
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : (multiple lines)

5.   Local Site Ties

5.1  Monument Name            : DORIS antenna ref. pt. (LIBA)
     Site Ref CDP Number      :
     Site Ref Domes Number    : 32809S002
     Differential Components from GPS Mark to Site Reference (ITRS)
       dx (m)                 :2.745
       dy (m)                 : -0.157
       dz (m)                 : 14.392
     Accuracy (mm)            : 2
     Date Measured            : February 1999
     Additional Information   : Survey by IGN-FRANCE
                            

6.   Frequency Standard

6.1  Standard Type            : INTERNAL
       Frequency              : 
       Effective Dates        : 
       Notes                  : (multiple lines)


7.   Collocation Information

7.1  Instrumentation Type     : DORIS
       Status                 : PERMANENT
       Effective Dates        : 10 JAN 1998
       Notes                  : 


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 GPS (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 GPS (m)    : (m)
       Elev Diff to GPS (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                   : Cenre National d'Etudes Spatiales  
CNES
     Mailing Address          : (multiple lines)
     Primary Contact
       Contact Name           : Roger Baldacchino
       Telephone (primary)    : (241) 761139
       Fax                    : (241) 773351
       E-mail                 : 
     Secondary Contact
       Contact Name           : 
       Telephone (primary)    :
       Fax                    : 
       E-mail                 :
     Additional Information   : (multiple lines)


10.  Responsible Agency (if different from 9.)

     Agency                   : Centre National d'Etudes Spatiales 
(CNES)
     Mailing Address          : DEE/EO/ST/SC - 18, avenue Edouard 
Belin
                              : 31401 Toulouse cedex 04 - France
       Primary Contact
       Contact Name           : Louis Duquesne
       Telephone (primary)    : (33) 5 61 28 19 62
       Fax                    : (33) 5 61 28 15 36
       E-mail                 : gpscnes@cst.cnes.fr
     Secondary Contact
       Contact Name           : 
       Telephone (primary)    : 
       Fax                    : 
       E-mail                 :
     Additional Information   : (multiple lines)


11.  More Information

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