HILO Site Information Form
     Pacific GPS Facility


0.   Form

     Prepared by (full name)  : James Foster
     Date Prepared            : 01-MAY-2001
     Report Type              : NEW
     Prepared Using           :


1.   Site Identification of the GPS Monument

     Site Name                : Hilo Airport
     Four Character ID        : HILO
     Monument Inscription     :
     IERS DOMES Number        : 49979S001
     CDP Number               : 
     Date Installed           : 01-JAN-1999 00:00 UT
     Geologic Characteristic  : SOIL
       Bedrock Type           : IGNEOUS
       Bedrock Condition      : FRESH
       Fracture Spacing       : over 200 cm
       Notes                  : Monument is a steel mast ~ 2m high anchored to
                              : an extensive concrete pad embedded in a shallow
                              : soil layer over a volcanic surface.
     Additional Information   : Geodetic reference point is top-center of steel
                              : coupler atop steel mast anchored to concrete pad


2.   Site Location Information

     City or Town             : Hilo
     State or Province        : Hawaii
     Country                  : USA
     Tectonic Plate           : Pacific
     Approximate Position
       X coordinate (m)       : -5446001.
       Y coordinate (m)       : -2533417.
       Z coordinate (m)       :  2138468.
       Latitude (deg)         :  19.7192 N
       Longitude (deg)        : 155.0527 W
       Elevation (m)          : 29.
     Additional Information   : Reference frame used is ITRF97.
                              : Coordinate system used is WGS84.


3.   GPS Receiver Information

3.1  Receiver Type            : ASHTECH Z-XII3
     Serial Number            : LP00543
     Firmware Version         : 1F50
     Date Installed           : 01-JAN-1999 00:00 UT
     Date Removed             : 22-AUG-1999 02:02 UT
     Additional Information   : 

3.2  Receiver Type            : ASHTECH Z-XII3
     Serial Number            : LP03149
     Firmware Version         : CC00
     Date Installed           : 23-AUG-1999 20:31 UT
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : 


4.   GPS Antenna Information

4.1  Antenna Type             : ASH700936D_M
     Serial Number            : 11943
     Antenna Height (m)       : 0.0000
     Antenna Reference Point  : BPA
     Degree Offset from North : 0
     Antenna Radome Type      : SNOW
     Date Installed           : 01-JAN-1999 00:00 UT
     Date Removed             : (dd-MMM-yyyy hh:mm UT)
     Additional Information   : 


5.   Local Site Ties

5.x  Monument Name            : 
     Site Ref CDP Number      : (XXXX)
     Site Ref Domes Number    : (XXXXXXXXX)
     Differential Components from GPS Mark 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            : INTERNAL
     Frequency                : 
     Effective Dates          : 01-JAN-1999 - 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                   : Pacific GPS Facility
     Mailing Address          : POST Room 602
                              : 1680 East West Road
                              : Honolulu, HI 96822
     Primary Contact
       Contact Name           : James Foster
       Telephone (primary)    : (808) 956 2360
       Telephone (secondary)  :
       Fax                    : (808) 956 3188
       E-mail                 : gps@soest.hawaii.edu
     Secondary Contact
       Contact Name           : David Phillips
       Telephone (primary)    : (808) 956 2360
       Telephone (secondary)  :
       Fax                    : (808) 956 3188
       E-mail                 : gps@soest.hawaii.edu
     Additional Information   : 


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               :
       Site Diagram           :
       Horizon Mask           :
       Monument Description   :
       Site Pictures          :
     Additional Information   :
     Antenna Graphics with Dimensions

               Ashtech: ASH700936D_M    SNOW


                         -----
                     /     +     \                       <--  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