USNX Site Information Form
     GPS/GLONASS Campaign IGEX98


0.   Form

     Prepared by (full name)  : Francine Vannicola
     Date Prepared            : 13-APR-2000
     Report Type              : UPDATE
     Prepared Using           :


1.   Site Identification of the GPS/GLONASS Monument

     Site Name                : U.S. Naval Observatory (USNO)
     Four Character ID        : USNX
     Monument Inscription     : none
     IERS DOMES Number        : 40451S004
     CDP Number               : none
     Monument Description     : none
     Date Installed           : 12-JUN-1998
     Geologic Characteristic  : located on roof of Building 78
       Bedrock Type           :
       Bedrock Condition      :
       Fracture Spacing       :
       Notes                  :
     Additional Information   : The antenna location is now on the northeast
				roof (flat) corner of Building 78 (2 stories)
				at the U.S. Naval Observatory inside
				Washington, D.C.  NIMA marker 32017 1987 GSGS
				is located on the southwest corner of the
				same building.


2.   Site Location Information

     City or Town             : Washington, DC
     State or Province        : District of Columbia (DC)
     Country                  : USA
     Tectonic Plate           : North American
     Approximate Position
       X coordinate (m)       : +1112167.60
       Y coordinate (m)       : -4842851.58
       Z coordinate (m)       : +3985490.59
       Latitude (deg)         : 38.92053083 N
       Longitude (deg)        : 77.06620722 W
       Elevation (m)          : 53.469
     Additional Information   : The antenna had to be moved due to
                                construction in original area. New
                                position effective 12-APR-2000 17:00 UT.


3.   Receiver Information

3.1  Receiver Type            : 3SNAV R100-30T
     Satellite System         : GPS+GLONASS
     Serial Number            : 28
     Firmware Version         : Release 5.5
     Date Installed           : 27-JAN-2000 15:30 UT
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : (multiple lines)


4.   Antenna Information

4.1  Antenna Type             : TSA-100 3S CR
     Serial Number            :
     Antenna Height (m)       : (m)
     Antenna Reference Point  : ARP
     Degree Offset from North : oriented North but not measured
     Antenna Radome Type      :
     Date Installed           : 12-JUN-1998
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : (multiple lines)


5.   Local Site Ties

5.1  Monument Name            : none
     Site Ref CDP Number      : none
     Site Ref Domes Number    : none
     Differential Components from GPS/GLONASS Marker to Site Reference (ITRS)
       dx (m)                 : (m)
       dy (m)                 : (m)
       dz (m)                 : (m)
     Accuracy (mm)            : (mm)
     Date Measured            : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : (multiple lines)


6.   Frequency Standard

6.1  Standard Type            : steered H-MASER
       Frequency              : 5MHz
       Effective Dates        : 12-JUN-1998
       Notes                  : reference signal from H-maser located in 
				building 78 which is the USNO Master Clock
				(MC2), the realization of UTC(USNO)


7.   Collocation Information

7.1  Instrumentation Type     : none
       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 Ant (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 Antenna (m): (m)
       Elev Diff to Ant (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                   : U.S. Naval Observatory
     Mailing Address          : Time Service Department
				3450 Massachusetts Avenue, N.W.
				Washington, DC  20392-5420
     Primary Contact
       Contact Name           : Francine Vannicola
       Telephone (primary)    : 202-762-1455
       Telephone (secondary)  :
       Fax                    : 202-762-1511
       E-mail                 : fmv@cassini.usno.navy.mil
     Secondary Contact
       Contact Name           :
       Telephone (primary)    :
       Telephone (secondary)  :
       Fax                    :
       E-mail                 :
     Additional Information   : (multiple lines)


10.  Responsible Agency (if different from 9.)

     Agency                   : (multiple lines)
     Mailing Address          : (multiple lines)
     Primary Contact
       Contact Name           :
       Telephone (primary)    :
       Telephone (secondary)  :
       Fax                    :
       E-mail                 :
     Secondary Contact
       Contact Name           :
       Telephone (primary)    :
       Telephone (secondary)  :
       Fax                    :
       E-mail                 :
     Additional Information   : (multiple lines)


11.  More Information

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

     (insert text graphic)


12.  Local Events Possibly Affecting Computed Position

12.x  Date                    : (dd-MMM-yyyy hh:mm UT)
      Event                   : (multiple lines)