UNSA Site Information Form
     International GPS Service for Geodynamics


0.   Form

     Prepared by (full name)  : Juergen Neumeyer and Jose Viramonte
     Date Prepared            : 15-FEB-2000
     Report Type              : new
     Prepared Using           :


1.   Site Identification of the GPS Monument

     Site Name                : UNSA Salta
     Four Character ID        : unsa
     Monument Inscription     : Stable pillar on the roof of a small
building
     IERS DOMES Number        : 41514M001
     CDP Number               : none
     Date Installed           : 26-JAN-1995
     Geologic Characteristic  :
       Bedrock Type           : CONGLOMERATE and CLAY
       Bedrock Condition      : WEATHERED
       Fracture Spacing       : 50-200 cm and over 200 cm
       Notes                  :
     Additional Information   :


2.   Site Location Information

     City or Town             : Salta
     State or Province        :
     Country                  : Argentina
     Tectonic Plate           : South American
     Approximate Position
       X coordinate (m)       : 2412830.40        
       Y cordinate (m)        : -5271936.71        
       Z coordinate (m)       : -2652209.15
       Latitude (deg)         : -24.7275
       Longitude (deg)        : -65.4076
       Elevation (m)          : 1257.8
     Additional Information   :


3.   GPS Receiver Information

3.1  Receiver Type            : TRIMBLE 4000SSE
     Serial Number            : 3248A02002
     Firmware Version         : nav. version 5.68
     Date Installed           : 26-JAN-1995 00:00 UT
     Date Removed             : 30-NOV-1998 00:00 UT
     Additional Information   :

3.2  Receiver Type            : ASHTECH Z-XII3
     Serial Number            : LP00788
     Firmware Version         : 1F60-1D02
     Date Installed           : 03-DEC-1998
     Date Removed             : 02-NOV-1999
     Additional Information   : using GBSS 2.0 logging software

3.3  Receiver Type            : ASHTECH Z-XII3
     Serial Number            : LP00788
     Firmware Version         : 1D02-CC00
     Date Installed           : 02-NOV-1999 15:20 UT
     Date Removed             :
     Additional Information   : using GBSS 3.0 logging software


4.   GPS Antenna Information

4.1  Antenna Type             : TRM14532.00
     Serial Number            : 3247A66317
     Antenna Height (m)       : 0.046 m
     Antenna Reference Point  : ARP
     Degree Offset from North :
     Antenna Radome Type      : no
     Date Installed           : 26-JAN-1995 00:00 UT
     Date Removed             : 30-NOV-1998 00:00 UT
     Additional Information   :

4.2  Antenna Type             : ASH700936C_M
     Serial Number            : 12131
     Antenna Height (m)       : 0.046
     Antenna Reference Point  : ARP
     Degree Offset from North :
     Antenna Radome Type      : Ashtech
     Date Installed           : 03-DEC-1998 00:00 UT
     Date Removed             :
     Additional Information   :


5.   Local Site Ties

5.1  Monument Name            :
     Site Ref CDP Number      :
     Site Ref Domes Number    :
     Differential Components from GPS Mark to Site Reference (ITRS)
       dx (m)                 :
       dy (m)                 :
       dz (m)                 :
     Accuracy (mm)            :
     Date Measured            :
     Additional Information   :


6.   Frequency Standard

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

7.   Collocation Information

7.1  Instrumentation Type     :
       Status                 :
       Effective Dates        :
       Notes                  :


8.   Meteorological Instrumentation

8.1  Humidity Sensor Model    :
       Manufacturer           :
       Data Frequency         :
       Accuracy (% rel h)     :
       Effective Dates        :
       Notes                  :

8.2  Pressure Sensor Model    :
       Manufacturer           :
       Data Frequency         :
       Accuracy (mbar)        :
       Height Diff to GPS (m) :
       Effective Dates        :
       Notes                  :

8.3  Temperature Sensor Model :
       Manufacturer           :
       Data Frequency         :
       Accuracy (deg C)       :
       Effective Dates        :
       Notes                  :

8.4  Water Vapor Radiometer   :
       Manufacturer           :
       Distance to GPS (m)    :
       Elev Diff to GPS (m)   :
       Effective Dates        :
       Notes                  :

8.5  Other Instrumentation    : seisograph


9.   On-Site, Point of Contact Agency Information

     Agency                   : Universidad Salta Instituto Geonorte
     Mailing Address          : Buenos Aires 117 - 4000 Salta -
Argentina
     Primary Contact
       Contact Name           : Prof. Dr. Jose G. Viramonte
       Telephone (primary)    : +54-387-4255441
       Telephone (secondary)  :
       Fax                    : +54-387-4255483
       E-mail                 : viramont@unsa.edu.ar
     Secondary Contact
       Contact Name           : Monica Escayola
       Telephone (primary)    : +54-387-4255441
       Telephone (secondary)  :
       Fax                    :
       E-mail                 : escayola@unsa.edu.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



             Trimble: 4000ST L1/L2 GEOD

                       ----+----                          <--  0.070  L1

                    /      +      \                       <--  0.068  L2

++----------------+-----------------+-----------------++  <--  0.063
TGP
++---------------+-------------------+----------------++  <--  0.060
BGP
                 |                   |
                  |                 |
                   |               |
                    +------x------+                       <--  0.000
ARP=BPA

                    <--  0.140  -->
BPA
                 <--     0.155     -->
TPA
 <--                     0.467                      -->
NOTCHES
<--                      0.483                       -->
EDGE









        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