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     SITE INFORMATION FORM
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0. Form

        Prepared by (full name): Yehuda Bock
        Date                   : May 7, 1994
        Report type            : UPDATE (coordinates)
 
1. Site Identification of the GPS monument

        Site Name              : Blythe PGGA station
        4 char ID              : BLYT
        Monument Inscription   : Riverside County Surveyor
                                 Blythe Airbase Continuous
                                 GPS Tracking Station
                                 Nov. 1993
                                 Gerald Stayner
        IERS DOMES Number      : 40479M001   (Altamimi, 10 May 94)
        CDP Number             : Not assigned
        Date                   : January 13, 1994
        Additional information : PGGA - Permanent GPS Geodetic Array

2. Site Location

        City                   : Blythe
        Country                : Riverside County, California USA
        Tectonic Plate         : Pacific-North America plate boundary
                                 (essentially North American plate)
        Additional information : ITRF92 coordinates (m) --
                                 X -2223206.587
                                 Y -4830299.913
                                 Z  3510587.788
                                 Epoch 1994.3080

3. GPS Receiver

     a) Type                   : Ashtech ZX-II3 (Z12) Model 700570-6A
        Serial Number          : 03435
        Firmware Version       : NAV 1C00, CHN 1C00
        Date                   : January 13, 1994
        Note                   : First measurements

     b) Type                   : Ashtech ZX-II3 (Z12) Model 700570-6A
        Serial Number          : 03435
        Firmware Version       : NAV 1C01, CHN 1C00
        Date                   : January 25, 1994
        Note                   : Firmware Upgrade

4. GPS Antenna

        Type                   : Ashtech L1/L2 P
        Serial Number          : 700228D2941
        Date                   : January 13, 1994
        Vertical Antenna Height: 0.036m
        Antenna Reference Point: BPA (Bottom of Preamplifier)
        Date                   : January 13, 1994

5. Local Site Ties -- In progress
        
6. Frequency standard

        H-maser /   /   Cesium /   /    Quartz /   /     Internal / X /
        Other (specify)        :
        Date                   : January 13, 1994

7. Collocation -- None

8. On-site, Point of Contact Agency Information 

        Agency                 : County of Riverside
                                 Transportation and Land Management Agency
                                 Transportation Department
        Contact                : Gerald Stayner
                                 County Surveyor
        Address                : 4080 Lemon Street, 8th Floor
                                 Riverside, CA 92501 USA
        Telephone              : (909) 275-6700 
        E-mail                 : 
        Fax                    : (909) 275-6721

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

        Agency                 : Scripps Institution of Oceanography
        Contact                : Yehuda Bock / Keith Stark
        Address                : IGPP 0225, Scripps Institution of Oceanography
                                 9500 Gilman Drive, La Jolla, CA 92093-0225
        Telephone              : (619) 534-7692 (0229/5292)
        E-mail                 : bock@pgga.ucsd.edu, stark@pgga.ucsd.edu
        Fax                    : (619) 534-9873

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


               Ashtech: GEODETIC L1/L2 P

                           ^
                 +-------------------+
  +--+ +-------+-----------+-----------+--------+ +--+  <-- 0.064    
                                                              TGP=L1=L2
+-+--+ +------------+-------------+-------------+ +--+-+ <--  0.060  BGP
                    |-------------|
                    |-------------|
                    |-------------|
                    |-------------|
                    +------x------+                  <--  0.000  ARP=BPA

                  <--    0.080    -->
      <--                0.2636                -->
<--                      0.286                       -->


   ARP: Antenna Reference Point
   L1 : L1 Phase Center                   L2 : L2 Phase Center
   TCR: Top of Chokering                  BCR: Bottom of Chokering
   TGP: Top of Ground Plane               BGP: Bottom of Ground Plane
   TPA: Top of Preamplifier               BPA: Bottom of Preamplifier

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