City of Beaverton Public Works

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City of Beaverton Public Works

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GPS Base Station

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NGS CORS96 - Beaverton Data


Station

BTON (PID AJ8208): City of Beaverton, Oregon
datasheet—BY STATION NAME: http://www.ngs.noaa.gov/cgi-cors/corsage.prl?site=BTON

GPS Station Antenna

Station Data Files

The City of Beaverton provides thirty days of observation and navigation data, at a 5 second collection rate, available in RINEX (Receiver Independent Exchange) format and Ashtech proprietary file format: BeavertonOregon.gov/GPSstation

The files are zipped, with one zip file per one day of observation. If you do not have a zip utility we have provided links to a few vendors: Winzip, Pkzip.

• RINEX Data Files       • ASHTECH Files

View or download complete Site Information Form.

Contact

City of Beaverton P.O. Box 4755
4755 SW Griffith Dr. Beaverton, OR 97076-4755
Phone: (503) 526-2269. Fax: (503) 350-4052

GPS Station Antenna

Location

The antenna is attached to the inside of the East parapet of the third floor roof of City Hall. The receiver and computer are located in an electrical room accessed through the Engineering Division, also on the third floor of City Hall, located at 4755 SW Griffith Dr., Beaverton, OR 97076.

Equipment

The receiver is an Ashtech Z-12. The antenna is an Ashtech Geodetic III Whopper (part number 700718 B). Data capture, storage and conversion to RINEX, is managed by Ashtech "Geodetic Base Station Software" (GBSS).

Description

The station is a 2 inch (5cm) galvanized iron pipe, 5.75 feet (175cm) long; permanently attached to the building. The elevation of the station is the same as the ARP.

ANTENNA REFERENCE POINT (ARP)
NAD83(CORS)(EPOCH 2002.00)
Latitude 45 29 08.88672 N
Longitude 122 47 50.56450 W
X (meters) - 2,426,293.533
Y (meters) - 3,765,248.853
Z (meters) 4,525,396.610
Ellipsoid Height (meters) 47.09
Geoid Height (meters) - 22.87 (Geoid 99)

STATE PLANE COORDINATES  OREGON (North Zone)
NAD83(CORS)  ARP
North (meters) 204,699.683
East (meters) 2,320,436.569
North (SI Feet) 671,586.886
East (SI Feet) 7,612,980.869


ARP ELEVATION (NGVD 29) = 226.165
Derived from City of Beaverton bench mark P73 by trigonometric leveling, using a Leica T2000 and DI5.

ARP ELEVATION (NAVD 88) = 229.669 (feet)
Derived using VERTCON http://www.ngs.noaa.gov/TOOLS/Vertcon/vertcon.html

The elevation of the station is the same as the ARP.

L1 phase center = ARP + 0.0839m (0.275 feet)

L2 phase center = ARP + 0.0812m (0.266 feet)