ONSA Site Information Form
     International GPS Service for Geodynamics


0.   Form

     Prepared by (full name)  : Jan Johansson
     Date Prepared            : 29-JUL-1993
     Report Type              : UPDATE
     Prepared Using           :


1.   Site Identification of the GPS Monument

     Site Name                : ONSALA
     Four Character ID        : ONSA
     Monument Inscription     : ONSALA 301
     IERS DOMES Number        : 10402M004
     CDP Number               : (XXXX)
     Date Installed           : 01-JUL-1991 hh:mm UT
     Geologic Characteristic  : (BEDROCK/CLAY/CONGLOMERATE/GRAVEL/SAND/etc)
       Bedrock Type           : (IGNEOUS/METAMORPHIC/SEDIMENTARY)
       Bedrock Condition      : (FRESH/JOINTED/WEATHERED)
       Fracture Spacing       : (1-10 cm/10-50 cm/50-200 cm/over 200 cm)
       Notes                  : (multiple lines)
     Additional Information   : (multiple lines)


2.   Site Location Information

     City or Town             : ONSALA
     State or Province        :
     Country                  : SWEDEN
     Tectonic Plate           : EURA
     Approximate Position
       X coordinate (m)       : 3370658.6942
       Y coordinate (m)       :  711877.0150
       Z coordinate (m)       : 5349786.8637
       Latitude (deg)         : 57.3953
       Longitude (deg)        : 11.9255
       Elevation (m)          : 46.5789
     Additional Information   : Swedish westcoast, near Gothenburg


3.   GPS Receiver Information

3.1  Receiver Type            : ROGUE SNR-8000
     Serial Number            : 199
     Firmware Version         : 2.8
     Date Installed           : 01-JUL-1993 hh:mm UT
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : (multiple lines)

3.x  Receiver Type            :
     Serial Number            :
     Firmware Version         :
     Date Installed           : (dd-MMM-yyyy hh:mm UT)
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : (multiple lines)


4.   GPS Antenna Information

4.1  Antenna Type             : DORNE MARGOLIN B
     Serial Number            : 20
     Antenna Height (m)       : 0.995
     Antenna Reference Point  : ARP
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 01-JUL-1991 hh:mm UT
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : (multiple lines)

4.x  Antenna Type             :
     Serial Number            :
     Antenna Height (m)       : (m)
     Antenna Reference Point  : (ARP/BCR/BPA)
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : (dd-MMM-yyyy hh:mm UT)
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : (multiple lines)


5.   Local Site Ties

5.1  Monument Name            : ONSALA 131
     Site Ref CDP Number      : 7213
     Site Ref Domes Number    : 10402S002
     Differential Components from GPS Mark to Site Reference (ITRS)
       dx (m)                 : -52.631
       dy (m)                 : 40.464
       dz (m)                 : 43.865
     Accuracy (mm)            : 1
     Date Measured            : 15-APR-1993 hh:mm UT
     Additional Information   : Differential coordinates from the GPS
                              : monument to the reference and other monuments
                              : The components are parallel to the XYZ-axes
                              : of the global geocentric reference system
                              : ITRF (WGS-84).

5.2  Monument Name            : ONSALA 501
     Site Ref CDP Number      : 7211
     Site Ref Domes Number    : 10402M006
     Differential Components from GPS Mark to Site Reference (ITRS)
       dx (m)                 : -16.704
       dy (m)                 : -10.902
       dz (m)                 : 9.290
     Accuracy (mm)            : 1
     Date Measured            : 15-APR-1993 hh:mm UT
     Additional Information   : Differential coordinates from the GPS
                              : monument to the reference and other monuments
                              : The components are parallel to the XYZ-axes
                              : of the global geocentric reference system
                              : ITRF (WGS-84).

6.   Frequency Standard

6.1  Standard Type            : H-MASER
       Frequency              :
       Effective Dates        : 01-JUL-1991
       Notes                  : (multiple lines)

6.x  Standard Type            : (H-MASER/CESIUM/QUARTZ/INTERNAL/RUBIDIUM)
       Frequency              :
       Effective Dates        : (dd-MMM-yyyy - dd-MMM-yyyy)
       Notes                  : (multiple lines)


7.   Collocation Information

7.x  Instrumentation Type     : VLBI
       Status                 : PERMANENT
       Effective Dates        : (dd-MMM-yyyy - dd-MMM-yyyy)
       Notes                  : Mobile VLBI, Gravim


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                   : Onsala Space Observatory/Chalmers University
     Mailing Address          : S-439 92 Onsala, Sweden
     Primary Contact
       Contact Name           : Jan Johansson
       Telephone (primary)    : +46 300 35500
       Telephone (secondary)  :
       Fax                    : +46 300 35590
       E-mail                 : jmj@nore.oso.chalmers.se
     Secondary Contact
       Contact Name           :
       Telephone (primary)    :
       Telephone (secondary)  :
       Fax                    :
       E-mail                 : geo@oden.oso.chalmers.se
     Additional Information   : (multiple lines)


10.  Responsible Agency (if different from 9.)

     Agency                   : (multiple lines)
     Mailing Address          : (multiple lines)
     Primary Contact
       Contact Name           :
       Telephone (primary)    :
       Telephone (secondary)  :
       Fax                    :
       E-mail                 :
     Secondary Contact
       Contact Name           :
       Telephone (primary)    :
       Telephone (secondary)  :
       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   : X
       Site Pictures          : X
     Additional Information   : (multiple lines)
     Antenna Graphics with Dimensions


    ROGUE:  DORNE MARGOLIN B  (Allen Osborne Design)

                         -----
                     /     +     \                        <-- 0.096  L2
                    |      +      |                       <-- 0.078  L1
  +-----------------+-------------+------------------+    <-- 0.070  TCR
  |                                                  |
  |                                                  |
  |                                                  |
  |                                                  |
  |                                                  |
  +-----------------+------x------+------------------+    <-- 0.000  ARP
                    |             |
                    +-------------+                       <-- -0.011
                          ||  ||

  <--                    0.351                     -->


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