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    CHURCHILL (CHUR) SITE INFORMATION FORM
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   0. Form

          Prepared by            : Robert Duval
          date                   : 18-Sept-96
          Report type            : Update

   1. Site Identification of the GPS Monument

          Site name              : CHURCHILL
          Station_name           : CHUR CACS-ACP
          4 char ID              : CHUR
          Monument inscription   : 924001
          IERS Domes No          : TBD
          CDP Number             :
          Date                   : Operational Since 13-APR-94
          Additional Information : Monument is a concrete pillar on bedrock
                                   with force centering plate. Horizon is
                                   clear of obstructions.

   2. Site Location:

          City                   : CHURCHILL, MANITOBA
          Country                : CANADA
          Tectonic Plate         : NOAM
          Additional Information : At GSC-NRCan Seismic Station

   3. GPS Receiver(s):

          Type                   : TURBO-ROGUE SNR-8000
          Serial Number          : T305
          Firmware Version       : TURBO 2.8.32.1
          Date                   : 13-APR-94 (20:04 UT) to 05-OCT-95 (18:10 UT)


          Type                   : TURBO-ROGUE SNR-8000
          Serial Number          : T305
          Firmware Version       : TURBO 3.2.32.1
          Date                   : 05-OCT-95 (04:00 UT) to 04-SEP-96 (04:00 UT)

          Type                   : TURBO-ROGUE SNR-8000
          Serial Number          : T230
          Firmware Version       : TURBO 3.2.32.1
          Date                   : 17-SEP-96 (19:07 UT)  to  Present

   4. GPS Antenna(s):

          Type                   : DORNE-MARGOLIN T
          Serial Number          : 387
          Vertical Antenna Height: 0.000 Meter
          Antenna Ref. Point     : BOTTOM OF ANTENNA ASSEMBLY
          Date                   : 13-APR-94 (20:04 UT)  to  Present

     The antenna height is measured from the GPS monument to the antenna
     reference point (ARP) as it has been defined in the graphic (item 10).

   5. Local Site Tie(s):

     N/A

   6. Frequency standard - Marked with  "X"

          H-maser /   /   Cesium /  /   Rubidium / X /   Internal/  /
          Date                   : 13-APR-94 (20:04 UT) to present

   7. Collocation  ( "P" for permanent, "M" for mobile collocation)

          SLR   /   /   VLBI  /   /   DORIS  /   /   PRARE  /   /
          Other (specify)         :

   8. On Site Agency Information  :

          Agency                  : GEODETIC SURVEY OF CANADA
          Contact                 : Robert Duval
          Address                 : 615 Booth St., Ottawa, Ont.,
                                    CANADA,K1A 0E9
          Telephone               : 613-947-2786
          E-mail                  : duval@geod.nrcan.gc.ca
          Fax                     : 613-995-3215

   9. Responsible Operations Agency :
      If different from item 8

          Agency                  : See No.8
          Contact                 :
          Address                 :

          Telephone               :
          E-mail                  :
          Fax                     :

   10. Graphic(s) corresponding to antenna type on site


   ANTENNA CONFIGURATION ON SITE SINCE 13-APR-94:

       Type: DORNE MARGOLIN T

                                      ---
       L2 Phase Center =>         /    +    \             <---------------+
       L1 Phase Center =>        |     +     |            <---------+     |
                +----------------------------------------------+    |     |
                |                                              |    |     |
                |                                              |    |     |
                |                                              |    |   0.128m
                |                                              |  0.110m  |     |
               ==================================================   |     |
                                 |           |                      |     |
                                 |    +-+    |                      |     |
  Antenna   =>  +----------------+====| |====+-----------------+ <--+-----+
  Ref. Point    |                                              |
  (ARP)         |                                              |
                |                                              |
                |               Concrete pillar                |
                |                                              |
                |                                              |
                |                                              |


   ARP: Antenna Reference Point
   L1 : L1 Phase Center                   L2 : L2 Phase Center

   11. Hard copy information available

          Site map                : YES
          Site Diagram            : YES
          Horizon Mask            : YES
          Monument Description    : YES
          Site pictures           : YES