RIOG Site Information Form
     International GPS Service for Geodynamics


0.   Form

     Prepared by (full name)  : Juergen Neumeyer and Jose Luis
    Hormaechea
     Date Prepared            : 7-SEP-1999
     Report Type              : UPDATE
     Prepared Using           :


1.   Site Identification of the GPS Monument

     Site Name                : Rio Grande
     Four Character ID        : RIOG
     Monument Inscription     : Concrete Pillar / Threaded brass mark on

    a triangular plate
     IERS DOMES Number        : 41507M004
     CDP Number               : none
     Date Installed           : MAR-1995
     Geologic Characteristic  : GRAVEL
       Bedrock Type           :
       Bedrock Condition      :
       Fracture Spacing       :
       Notes                  :
     Additional Information   :


2.   Site Location Information

     City or Town             :  Rio Grande
     State or Province        :  Tierra del Fuego
     Country                  :  Argentina
     Tectonic Plate           :  South American
     Approximate Position
       X coordinate (m)       :  1429907.7
       Y coordinate (m)       : -3495354.7
       Z coordinate (m)       : -5122698.6
       Latitude (deg)         :  53.79 S
       Longitude (deg)        :  67.75 W
       Elevation (m)          :  32
     Additional Information   :


3.   GPS Receiver Information

3.1  Receiver Type            : ASHTECH Z-XII3
     Serial Number            : LP00796
     Firmware Version         : 1E76-ID01
     Date Installed           : 12-NOV-1996
     Date Removed             : 1-SEP-1999 16:42 UT
     Additional Information   :

3.2  Receiver Type            : ASHTECH Z-XII3
     Serial Number            : LP00796
     Firmware Version         : 1D02-CD00
     Date Installed           : 1-SEP-1999 17:19 UT
     Date Removed             :
     Additional Information   :


4.   GPS Antenna Information

4.1  Antenna Type             : ASH700936C_M
     Serial Number            : 12126
     Antenna Height (m)       : 0.035
     Antenna Reference Point  : ARP
     Degree Offset from North : 0
     Antenna Radome Type      : Ashtech
     Date Installed           : 12-NOV-1996
     Date Removed             :



5.   Local Site Ties

5.1  Monument Name            : Doris2 Ant. (RIOB)
     Site Ref CDP Number      : none
     Site Ref Domes Number    : 41507S004
     Differential Components from GPS Mark to Site Reference (ITRS)
       dx (m)                 : -53.582
       dy (m)                 : +12.466
       dz (m)                 : -26.414
     Accuracy (mm)            : 0.002
     Date Measured            : JAN-1995 and JAN-1999
     Additional Information   :


6.   Frequency Standard

6.1  Standard Type            : INTERNAL
       Frequency              :
       Effective Dates        :
       Notes                  :

7.   Collocation Information

7.1  Instrumentation Type     : DORIS
       Status                 : PERMANENT
       Effective Dates        : 1990 -
       Notes                  :


8.   Meteorological Instrumentation

8.1  Humidity Sensor Model    : not available
       Manufacturer           :
       Data Frequency         :
       Accuracy (% rel h)     :
       Effective Dates        :
       Notes                  :

8.2  Pressure Sensor Model    : not available
       Manufacturer           :
       Data Frequency         :
       Accuracy (mbar)        :
       Height Diff to GPS (m) :
       Effective Dates        :
       Notes                  :

8.3  Temperature Sensor Model : not available
       Manufacturer           :
       Data Frequency         :
       Accuracy (deg C)       :
       Effective Dates        :
       Notes                  :

8.4  Water Vapor Radiometer   : not available
       Manufacturer           :
       Distance to GPS (m)    :
       Elev Diff to GPS (m)   :
       Effective Dates        :
       Notes                  :

8.5  Other Instrumentation    :


9.   On-Site, Point of Contact Agency Information

     Agency                   : Estacion Astronomica Rio Grande
     Mailing Address          : CC160
                              : 9420 Rio Grande - Tierra del Fuego
                              : Argentina
     Primary Contact
       Contact Name           : Prof. Dr. Raul Perdomo
       Telephone (primary)    : 54 221 421 7308
       Telephone (secondary)  : 54 221 483 8810
       Fax                    : 54 221 421 1761
       E-mail                 : perdomo@fcaglp.fcaglp.unlp.edu.ar
     Secondary Contact
       Contact Name           : Jose Luis Hormaechea
       Telephone (primary)    : 54 2964 430 123
       Telephone (secondary)  : 54 2964 433 930
       Fax                    : 54 2964 430 123
       E-mail                 : jlhor@earg.gov.ar
     Additional Information   :


10.  Responsible Agency (if different from 9.)

     Agency                   : GFZ Potsdam
     Mailing Address          : Telgrafenberg A17 - 14473 Potsdam -
    Germany
     Primary Contact
       Contact Name           : Dr. Juergen Neumeyer
       Telephone (primary)    : +49-331-288-1135
       Telephone (secondary)  :
       Fax                    : +49-331-288-1169
       E-mail                 : neum@gfz-potsdam.de
     Secondary Contact
       Contact Name           : Thomas Nischan
       Telephone (primary)    : +49-331-288-1170
       Telephone (secondary)  :
       Fax                    : +49-331-288-1169
       E-mail                 : nisn@gfz-potsdam.de
     Additional Information   :


11.  More Information

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

       Ashtech: DORNE MARGOLIN ASH


                         -----
                     /     +     \                       <--  0.128  L2
                    |      +      |                      <--  0.110  L1
  +--------------------------------------------------+   <--  0.102  TCR

  |                                                  |
  |                                                  |
  |                                                  |
  |                                                  |
+-+--------------------------------------------------+-+ <--  0.038
+-------------------+-------------+--------------------+ <--  0.035  BCR

                    |             |
                   =|             |
                    +------x------+                      <--  0.000  ARP

<--                      0.381                       -->


   ARP: Antenna Reference Point
   BCR: Bottom of Chokering
   TCR: Top of Chokering
   L1 : L1 Phase Center
   L2 : L2 Phase Center