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     SITE INFORMATION FORM
**********************************


0. Form

        Prepared by (full name): Ernie Marion
        Date                   : Feb. 5,1996
        Report type            : NEW
          (NEW or UPDATE)

1. Site Identification of the GPS monument

        Site Name              : Horn Point Enviromental Lab.
        4 char ID              : HNPT
        Monument Inscription   : (none)
        IERS DOMES Number      : TBD
        CDP Number             : (none)
        Date                   : Dec.13, 1995
        Additional information : (none)

2. Site Location

        City                   : Cambridge, Maryland
        Country                : U.S.A.
        Tectonic Plate         : North American
        Additional information :

3. GPS Receiver

        Type                   : Rogue SNR-12 (Turbo Rogue)
        Serial Number          : T210
        Firmware Version       : 3.2.32.1
        Date                   : Dec.13,1995 - present

   (use type names from attached list)

4. GPS Antenna

        Type                   : Dorne Margolin T
        Serial Number          : 196
        Date                   : Dec.13,1995 - present

   (use type names from attached list)

        Vertical Antenna Height:
        Antenna Reference Point:
        Date                   :

5. Local Site Ties

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

...................   ....... ........   ........ ........ ........ .. .. .. ..
...................   ....... ........   ........ ........ ........ .. .. .. ..
...................   ....... ........   ........ ........ ........ .. .. .. ..

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).

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

6. Frequency standard

        H-maser /   /   Cesium /   /    Quartz /   /     Internal / X  /
        Other (specify)        :
        Date                   : Dec.13,1995

        (Mark with 'X')

7. Collocation

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

        Other GEOPHYSICAL Instrumentation (specify) :

        Other (specify)        :

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

8. On-site, Point of Contact Agency Information

        Agency                 :
        Contact                :
        Address                :

        Telephone              :
        E-mail                 :
        Fax                    :

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

        Agency                 : Geosciences Laboratory, NOS/NOAA

        Contact                : Ernie Marion
        Address                : NOAA, N/OES13
                                 SSMC IV, Sta. 8201
                                 1305 East-West Hwy.
                                 Silver Spring, MD  20910
                                 U.S.A.
        Telephone              : 301-713-2852
        E-mail                 : ernie@gracie.grdl.noaa.gov
        Fax                    : 301-713-4475


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