NRC1 Site Information Form
     International GPS Service for Geodynamics


0.   Form

     Prepared by (full name)  : Peter Taylor
     Date Prepared            : 24-JUN-1999
     Report Type              : UPDATE
     Prepared Using           :


1.   Site Identification of the GPS Monument

     Site Name                : OTTAWA NRC
     Four Character ID        : NRC1
     Monument Inscription     : 943020
     IERS DOMES Number        : 40114M001
     CDP Number               : n/a
     Date Installed           : 25-APR-1994
     Geologic Characteristic  :
       Bedrock Type           :
       Bedrock Condition      :
       Fracture Spacing       :
       Notes                  :
     Additional Information   : Station located on the roof of a three story
                              : high building. Antenna mounted on an extension
                              : of the building steel structure anchored to
                              : bedrock and protruding through the roof.


2.   Site Location Information

     City or Town             : Ottawa
     State or Province        : Ontario
     Country                  : Canada
     Tectonic Plate           : North American
     Approximate Position
       X coordinate (m)       :  1112777.335
       Y coordinate (m)       : -4341475.826
       Z coordinate (m)       :  4522955.778
       Latitude (deg)         : 45.4542 N
       Longitude (deg)        : 75.6238 W
       Elevation (m)          : 82.4755
     Additional Information   : Located at the Frequency and Time Laboratory,
                              : Institute for National Measurement Standards,
                              : National Research Council Canada.


3.   GPS Receiver Information

3.1  Receiver Type            : ROGUE SNR-8000
     Serial Number            : T303
     Firmware Version         : Turbo 2.8.32.1
     Date Installed           : 01-JUN-1994  00:00 UT
     Date Removed             :
     Additional Information   :

3.2  Receiver Type            : ROGUE SNR-8000
     Serial Number            : T303
     Firmware Version         : Turbo 3.0.32.2
     Date Installed           : 22-DEC-1994  00:00 UT
     Date Removed             :
     Additional Information   :

3.3  Receiver Type            : ROGUE SNR-8000
     Serial Number            : T298
     Firmware Version         : Turbo 2.8.32.1
     Date Installed           : 24-MAR-1995  07:00 UT
     Date Removed             :
     Additional Information   :

3.4  Receiver Type            : ROGUE SNR-12 RM
     Serial Number            : 204
     Firmware Version         : Turbo 3.2.32.5X
     Date Installed           : 19-DEC-1996  00:00 UT
     Date Removed             : 04-FEB-1999  17:40 UT
     Additional Information   :

3.5  Receiver Type            : ROGUE SNR-8000
     Serial Number            : T298
     Firmware Version         : Turbo 3.2.32.5X
     Date Installed           : 04-FEB-1999  20:00 UT
     Date Removed             :
     Additional Information   :


4.   GPS Antenna Information

4.1  Antenna Type             : DORNE MARGOLIN T
     Serial Number            : 254
     Antenna Height (m)       : 0.000
     Antenna Reference Point  : ARP
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 01-JUN-1994  00:00 UT
     Date Removed             :
     Additional Information   :

4.2  Antenna Type             : AOAD/M_T
     Serial Number            : 280
     Antenna Height (m)       : 0.000
     Antenna Reference Point  : ARP
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 01-JUL-1996  00:00 UT
     Date Removed             :
     Additional Information   :


5.   Local Site Ties          : n/a


6.   Frequency Standard

6.1  Standard Type            : HYDROGEN MASER
       Frequency              :
       Effective Dates        : 01-JUN-1994 - dd-MMM-yyyy
       Notes                  :


7.   Collocation Information  : None

7.x  Instrumentation Type     : None
       Status                 :
       Effective Dates        :
       Notes                  :


8.   Meteorological Instrumentation

8.1  Humidity Sensor Model    : HMP-35A
       Manufacturer           : VAISALA
       Data Frequency         : 15 min
       Accuracy (% rel h)     : 2 %
       Effective Dates        : 05-JUN-1996 - dd-MMM-yyy)
       Notes                  : Sensor elevated 2 metres above roof level.

8.2  Pressure Sensor Model    : PTB-100A
       Manufacturer           : VAISALA
       Data Frequency         : 15 min
       Accuracy (mbar)        : 0.1 mb
       Height Diff to GPS (m) : 0.0 m
       Effective Dates        : 05-JUN-1996 - dd-MMM-yyyy
       Notes                  : Sensor readings compensated for temperature,
                              : non-linearity, calibration and height difference
                              : to GPS antenna.

8.3  Temperature Sensor Model : YSI 44212
       Manufacturer           : YSI
       Data Frequency         : 15 min
       Accuracy (deg C)       : 0.2 Deg C
       Effective Dates        : 05-JUN-1996 - dd-MMM-yyyy
       Notes                  : Sensor elevated 2 metres above roof level.

8.4  Other Instrumentation    : n/a


9.   On-Site, Point of Contact Agency Information

     Agency                   : Geodetic Survey of Canada
     Mailing Address          : 615 Booth St., Ottawa, Ontario
                              : CANADA, K1A 0E9
     Primary Contact
       Contact Name           : Mark Caissy
       Telephone (primary)    : 613-995-4024
       Telephone (secondary)  :
       Fax                    : 613-995-3215
       E-mail                 : caissy@geod.nrcan.gc.ca

     Secondary Contact
       Contact Name           : Peter Taylor
       Telephone (primary)    : 613-992-2106
       Telephone (secondary)  :
       Fax                    : 613-995-3215
       E-mail                 : peter.taylor@geod.nrcan.gc.ca
     Additional Information   :


10.  Responsible Agency       : same as 9. above.


11.  More Information

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


    Type: DORNE MARGOLIN T

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


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