WES2 Site Information Form
     International GPS Service for Geodynamics


0.   Form

     Prepared by (full name)  : Miranda Chin
     Date Prepared            : 03-APR-1997
     Report Type              : UPDATE
     Prepared Using           :


1.   Site Identification of the GPS Monument

     Site Name                : WESTFORD
     Four Character ID        : WES2
     Monument Inscription     : (not available)
     IERS DOMES Number        : 40440S020
     CDP Number               : (not available)
     Date Installed           : 08-FEB-1993 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   : CIGNET - Permanent GPS Tracking Network


2.   Site Location Information

     City or Town             : Westford
     State or Province        : Massachusetts
     Country                  : U.S.A.
     Tectonic Plate           : North America
     Approximate Position
       X coordinate (m)       : (m)
       Y coordinate (m)       : (m)
       Z coordinate (m)       : (m)
       Latitude (deg)         : ( dd.dddd N/S)
       Longitude (deg)        : (ddd.dddd E/W)
       Elevation (m)          : (m)
     Additional Information   : (multiple lines)


3.   GPS Receiver Information

3.1  Receiver Type            : ROGUE SNR-8000
     Serial Number            : T 146
     Firmware Version         : 2.8
     Date Installed           : 08-FEB-1993 hh:mm UT
     Date Removed             : 30-JUL-1994 hh:mm UT
     Additional Information   : (multiple lines)

3.2  Receiver Type            : ROGUE SNR-8000
     Serial Number            : T 149
     Firmware Version         : 2.8.32.1
     Date Installed           : 03-AUG-1994 hh:mm UT
     Date Removed             : 23-NOV-1994 hh:mm UT
     Additional Information   : (multiple lines)

3.3  Receiver Type            : ROGUE SNR-8000
     Serial Number            : T 109
     Firmware Version         : 3.0
     Date Installed           : 23-NOV-1994 hh:mm UT
     Date Removed             : 09-JAN-1995 hh:mm UT
     Additional Information   : (multiple lines)

3.4  Receiver Type            : ROGUE SNR-8000
     Serial Number            : T 109
     Firmware Version         : 3.1 (3.0.32.2)
     Date Installed           : 05-JAN-1995 hh:mm UT
     Date Removed             : 17-NOV-1995 hh:mm UT
     Additional Information   : (multiple lines)

3.5  Receiver Type            : ROGUE SNR-8000
     Serial Number            : T 109
     Firmware Version         : 3.2.32.1
     Date Installed           : 17-NOV-1995 hh:mm UT
     Date Removed             : 09-JUN-1996 hh:mm UT
     Additional Information   : (multiple lines)

3.6  Receiver Type            : ROGUE SNR-8000
     Serial Number            : T 139
     Firmware Version         : 3.2.32.1
     Date Installed           : 11-JUN-1996 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 T
     Serial Number            : 146
     Antenna Height (m)       : 0.000m
     Antenna Reference Point  : BPA (Bottom of the Pre-Amp)
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 08-FEB-1993 hh:mm UT
     Date Removed             : 08-JUL-1994 hh:mm UT
     Additional Information   : (multiple lines)

4.2  Antenna Type             : DORNE MARGOLIN T
     Serial Number            : 125
     Antenna Height (m)       : 0.000m
     Antenna Reference Point  : BPA (Bottom of the Pre-Amp)
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 08-JUL-1994 hh:mm UT
     Date Removed             : 30-JUL-1994 hh:mm UT
     Additional Information   : (multiple lines)

4.3  Antenna Type             : DORNE MARGOLIN T
     Serial Number            : 145
     Antenna Height (m)       : 0.000m
     Antenna Reference Point  : BPA (Bottom of the Pre-Amp)
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 03-AUG-1994 hh:mm UT
     Date Removed             : 07-AUG-1995 hh:mm UT
     Additional Information   : (multiple lines)

4.4  Antenna Type             : DORNE MARGOLIN T
     Serial Number            : 114
     Antenna Height (m)       : 0.000m
     Antenna Reference Point  : BPA (Bottom of the Pre-Amp)
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 08-AUG-1995 hh:mm UT
     Date Removed             : 01-SEP-1995 hh:mm UT
     Additional Information   : (multiple lines)

4.5  Antenna Type             : DORNE MARGOLIN T
     Serial Number            : 146 (w/single notch)
     Antenna Height (m)       : 0.000m
     Antenna Reference Point  : BPA (Bottom of the Pre-Amp)
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 06-SEP-1995 hh:mm UT
     Date Removed             : 29-MAR-1996 hh:mm UT
     Additional Information   : (multiple lines)

4.6  Antenna Type             : DORNE MARGOLIN T
     Serial Number            : 118
     Antenna Height (m)       : 0.000m
     Antenna Reference Point  : BPA (Bottom of the Pre-Amp)
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 29-MAR-1996 hh:mm UT
     Date Removed             : 04-JUN-1996 hh:mm UT
     Additional Information   : (multiple lines)

4.7  Antenna Type             : DORNE MARGOLIN T
     Serial Number            : 293
     Antenna Height (m)       : 0.000m
     Antenna Reference Point  : BPA (Bottom of the Pre-Amp)
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 04-JUN-1996 hh:mm UT
     Date Removed             : 09-JUN-1996 hh:mm UT
     Additional Information   : (multiple lines)

4.8  Antenna Type             : DORNE MARGOLIN T
     Serial Number            : 146
     Antenna Height (m)       : 0.000m
     Antenna Reference Point  : BPA (Bottom of the Pre-Amp)
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 11-JUN-1996 hh:mm UT
     Date Removed             : 01-JUL-1996 hh:mm UT
     Additional Information   : (multiple lines)

4.9  Antenna Type             : DORNE MARGOLIN T
     Serial Number            : 394
     Antenna Height (m)       : 0.000m
     Antenna Reference Point  : BPA (Bottom of the Pre-Amp)
     Degree Offset from North :
     Antenna Radome Type      :
     Date Installed           : 01-JUL-1996 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.x  Monument Name            : Westford VLBI  4. 6. 6.  96-10-04

     Site Ref CDP Number      : 7209
     Site Ref Domes Number    : 40440S003
     Differential Components from GPS Mark to Site Reference (ITRS)
       dx (m)                 : -26.796
       dy (m)                 : -41.022
       dz (m)                 : -30.476
     Accuracy (mm)            : 4. 6. 6.(mm)
     Date Measured            : 04-OCT-1996 hh:mm UT
     Additional Information   : (multiple lines)


6.   Frequency Standard

6.1  Standard Type            : H-MASER
       Frequency              :
       Effective Dates        : 08-FEB-1993 - dd-MMM-yyyy
       Notes                  : (multiple lines)


6.1  Standard Type            : INTERNAL
       Frequency              :
       Effective Dates        : 11-JUN-1996 - dd-MMM-yyyy
       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     : (DORIS/GLONASS/PRARE/SLR/VLBI)
       Status                 : (PERMANENT/MOBILE)
       Effective Dates        : (dd-MMM-yyyy - dd-MMM-yyyy)
       Notes                  : (multiple lines)


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                   : Haystack Observatory
     Mailing Address          : Route 40
                              : Westford  MA 01886
                              : U.S.A.
     Primary Contact
       Contact Name           : Peter Bolis
       Telephone (primary)    : 508-692-4765
       Telephone (secondary)  :
       Fax                    : 617-981-0590
       E-mail                 :
     Secondary Contact
       Contact Name           :
       Telephone (primary)    :
       Telephone (secondary)  :
       Fax                    :
       E-mail                 :
     Additional Information   : (multiple lines)


10.  Responsible Agency (if different from 9.)

     Agency                   : Geosciences Laboratory, NOS/NOAA
     Mailing Address          : NOAA, N/OES13
                              : SSMC IV, Sta 8201
                              : 1305 East-West Hwy.
                              : Silver Spring  MD  20910
                              : U.S.A.
     Primary Contact
       Contact Name           : Miranda Chin
       Telephone (primary)    : 301-713-2852
       Telephone (secondary)  :
       Fax                    : 301-713-4475
       E-mail                 : miranda@gracie.grdl.noaa.gov
     Secondary Contact
       Contact Name           : Linda Nussear
       Telephone (primary)    : 301-713-2852
       Telephone (secondary)  :
       Fax                    : 301-713-4475
       E-mail                 : linda@gracie.grdl.noaa.gov
     Additional Information   : (multiple lines)


11.  More Information

     URL for More Information :
     Hardcopy on File
       Site Map               : (Y)
       Site Diagram           : X
       Horizon Mask           : (Y)
       Monument Description   : (Y)
       Site Pictures          : (Y)
     Additional Information   : (multiple lines)
     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