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     SITE INFORMATION FORM
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0. Form

        Prepared by (full name): Danny van Loon
        Date                   : 11/23/1994
        Report type            : UPDATE
          (NEW or UPDATE)

1. Site Identification of the GPS monument

        Site Name              : Kootwijk Observatory for Satellite Geodesy
        4 char ID              : KOSG
        Monument Inscription   : KOSG-25
        IERS DOMES Number      : 13504M003
        CDP Number             :
        Date                   : Since January 1991.
        Additional information : The Kootwijk Observatory is operating under
                                 responsibility of the Faculty of Geodesy of
                                 the Delft University of Technology.	

2. Site Location

        City                   : Kootwijk (near Apeldoorn)
        Country                : The Netherlands
        Tectonic Plate         : Eurasian
        Additional information : none

3A. GPS Receiver

	Type                   : ROGUE SNR-8
	Serial Number          : R117
	Firmware Version       : Meenix 7.8
	Date (Start - End)     : 06/13/1994 - 08/23/1994
		
3B. GPS Receiver

        Type                   : ROGUE SNR-8000
        Serial Number          : T175
        Firmware Version       : Version 2.8
        Date (Start - End)     : 08/24/1994 - 11/22/94

3C. GPS Receiver

        Type                   : ROGUE SNR-8
        Serial Number          : R117
        Firmware Version       : Meenix 7.8
        Date (Start - End)     : 11/23/1994 - 

   (use type names from attached list)

4. GPS Antenna

        Type                   : DORNE MARGOLIN B (Model C146-6-1)
        Serial Number          : S/N 119
        Date                   : since January 1991.

   (use type names from attached list)

        Vertical Antenna Height: 0.105 m. (ARP above GPS-marker: KOSG-25)
        Antenna Reference Point: Bottom choke rings (= ARP)
        Date                   : since January 1991.

5. Local Site Ties

Monument        CDP    DOMES              Components      Accuracy Date
Name          Number  Number       dX       dY      dZ     mm yy-mm-dd

KOSG-23(SLR)   8833  13504M002   12.458   37.501  -23.025   3 93-04-14
KOSG-28        ....  .........  -17.115   32.379    1.144   3 93-04-14

Monument Name Description:

KOSG-23  Mobile SLR Reference Point.
KOSG-28  Mobile GPS Reference Point, also EUREF reference marker.

Differential coordinates from the GPS monument (KOSG-25) to the reference and
other monuments in meters. The components are parallel to the XYZ-axes of the
global geocentric reference system ITRF (WGS-84).

"Accuracy" is estimated accuracy of local survey (millimeters).

6. Frequency standard

        H-maser /   /   Cesium /   /    Quartz /   /     Internal /   /
        Other (specify) / X /  : 5065A Rubidium Vapor Frequency Standard
        Date                   : since January 1991.

        (Mark with 'X')

7. Collocation

        SLR    / M /    VLBI  /  /     DORIS  /  /     PRARE    /  /

        Other GEOPHYSICAL Instrumentation (specify)        : yes

        Other (specify)        : - Absolute gravimeter  (M)
				 - Relative gravimeters (M)
				 - Seismometer (P)	

        (Mark with 'P' for permanent, 'M' for mobile collocation)

8. On-site, Point of Contact Agency Information

        Agency                 : Delft University of Technology (DUT/KOSG)
        Contact                : Danny van Loon
        Address                : P.O.Box 581
        ZIPcode                : 7300 AN
        City                   : Apeldoorn
        Country                : The Netherlands
        Telephone              : (31) 5769 8219
        E-mail                 : VANLOON@GEO.TUDELFT.NL
        Fax                    : (31) 5769 1344

9. Responsible Operations Agency
   (if different from item 8)

        Agency                 :

        Contact                :
        Address                :

        Telephone              :
        E-mail                 :
        Fax                    :

10. Please insert here the character graphics corresponding to the
antenna type. Check, complete or change if necessary the antenna
dimensions.


    Rogue:  DORNE MARGOLIN B  (Allen Osborne Design)
    S/N 119 according to general figures.

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

  <--                    0.351                     -->


    Rogue: DORNE MARGOLIN B  (Allen Osborne Design)
    S/N 119 calibrated by DUT/KOSG in cooperation with ESA/ESTEC.

                         -----
                     /     +     \                        <-- 0.101  L2
                    |      +      |                       <-- 0.077  L1
  +--------------------------------------------------+    <-- 0.070  TCR
  |                                                  |
  |                                                  |
  |                                                  |
  |                                                  |
  |                                                  |
  +------------------------x-------------------------+    <-- 0.000  ARP
                    |             |
                    +-------------+                       <-- -0.010
                          ||  ||

  <--                    0.351                     -->


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

11. Hard copy information

    The next items should be compiled and sent to the Central Bureau
(see original IGS Station Information Report, or contact the CB for
forms).

    Please mark 'X' if on file or date expected to be available.

        Site Map               : X
        Site Diagram           : X 
        Horizon Mask           : X
        Monument description   : X
        Site pictures          : X