ZWEN Site Information Form
     International GPS Service for Geodynamics


0.   Form

     Prepared by (full name)  : Juergen Neumeyer
     Date Prepared            : 01-JUL-1999
     Report Type              : UPDATE
     Prepared Using           :


1.   Site Identification of the GPS Monument

     Site Name                : Astronomical Observatory of INASAN
                              : Zwenigorod
     Four Character ID        : ZWEN
     Monument Inscription     : Stable pillar on the roof of the main
building
     IERS DOMES Number        : 12330M001
     CDP Number               :
     Date Installed           : 08-MAR-1995 hh:mm UT
     Geologic Characteristic  :
       Bedrock Type           :
       Bedrock Condition      :
       Fracture Spacing       :
       Notes                  :
     Additional Information   :


2.   Site Location Information

     City or Town             : Zwenigorod
     State or Province        :
     Country                  : Russia
     Tectonic Plate           : Eurasian
     Approximate Position
       X coordinate (m)       : 2886359.1
       Y coordinate (m)       : 2155972.8
       Z coordinate (m)       : 5245886.9
       Latitude (deg)         :  55.70 N
       Longitude (deg)        :  36.76 E
       Elevation (m)          :  270
     Additional Information   :


3.   GPS Receiver Information

3.1  Receiver Type            : ROGUE SNR-8000
     Serial Number            : 287
     Firmware Version         : 2.8.32.1 from 93/05/25
     Date Installed           : 08-Mar-1995
     Date Removed             : Feb-1996
     Additional Information   :

3.2  Receiver Type            : ROGUE SNR-8000
     Serial Number            : 270
     Firmware Version         : 3.2
     Date Installed           : Feb-1996
     Date Removed             :
     Additional Information   :


4.   GPS Antenna Information

4.1  Antenna Type             : AOAD/M_T
     Serial Number            : 342
     Antenna Height (m)       : 0.046
     Antenna Reference Point  : ARP
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 08-MAR-1995
     Date Removed             :
     Additional Information   :

4.x  Antenna Type             :
     Serial Number            :
     Antenna Height (m)       :
     Antenna Reference Point  :
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           :
     Date Removed             :
     Additional Information   :


5.   Local Site Ties

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


6.   Frequency Standard

6.1  Standard Type            : INTERNAL
       Frequency              :
       Effective Dates        : 08-MAR-1995
       Notes                  :

6.x  Standard Type            :
       Frequency              :
       Effective Dates        :
       Notes                  :


7.   Collocation Information

7.x  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    :


9.   On-Site, Point of Contact Agency Information

     Agency                   : INASAN
     Mailing Address          :
     Primary Contact
       Contact Name           : Dr. Suriya Tatevian
       Telephone (primary)    : ++7-095-9512923
       Telephone (secondary)  :
       Fax                    :
       E-mail                 : statev@amon.inasan.rssi.ru
     Secondary Contact
       Contact Name           : Aleksei Pavlow
       Telephone (primary)    : ++7-095-9510881
       Telephone (secondary)  :
       Fax                    :
       E-mail                 : apavlov@inasan.rssi.ru
     Additional Information   :


10.  Responsible Agency (if different from 9.)

     Agency                   : GeoForschungsZentrum Potsdam, Germany
     Mailing Address          : Telegrafenberg A17, D-14473 Potsdam,
Germany
     Primary Contact
       Contact Name           : Dr. Juergen Neumeyer
       Telephone (primary)    : (+49)-331-2881135
       Telephone (secondary)  : (+49)-331-2881131
       Fax                    : (+49-331)2881111
       E-mail                 : neum@gfz-potsdam.de
     Secondary Contact
       Contact Name           : Thomas Nischan
       Telephone (primary)    : (+49)-331-2881170
       Telephone (secondary)  : (+49)-331-2881110
       Fax                    : (+49)-331-2881111
       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


             TURBOROGUE: DORNE MARGOLIN T

                         -----
                     /     +     \                        <--  0.128  L2

                    |      +      |                       <--  0.110  L1

  +--------------------------------------------------+    <--  0.102
TCR
  |                                                  |
  |                                                  |
  |                                                  |
  |                                                  |
+-+--------------------------------------------------+-+  <--  0.038
+-------------------+-------------+--------------------+  <--  0.035
BCR
                    |             |
                    |             |
                    +------x------+                       <--  0.000
ARP

<--                      0.381                       -->


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