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Trimble Inc.
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Sunnyvale, CA 94085
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Trimble Awarded Contract from Japanese GSI

Trimble GPS Monitors Movements in Earth's Crust, Helps Predict Earthquakes

COLOGNE, Germany, Sept. 19, 2001 - Trimble (NASDAQ: TRMB) announced today that the Japanese GSI (Geographical Survey Institute) has awarded a contract for the purchase of 360 additional 5700 Continuously Operating Reference Station (CORS) receivers to expand its GPS-based network. The network is used to monitor the movement of the earth's crust and ultimately aid in the prediction of earthquake activity in Japan. The purchase is part of an ongoing program to upgrade the GSI nationwide network. This follows an earlier purchase this year of more than 100 5700 CORS receivers for use in the same program. 
The announcement was made today at Intergeo 2001, the world's largest international event for geodesy and geoinformatics.
Trimble, in cooperation with Hitachi Zosen Information Systems (HZS), Japan, has supplied more than 830 GPS reference stations since 1992. GPS data from the 5700 CORS reference stations will support the existing monitoring system, which uses the Bernese processing software, and also provides the real-time information necessary to produce the network corrected Real-Time Kinematic (RTK) data created by the Virtual Reference Station (VRSTM) system.
Not only does the network of reference stations collect GPS information to monitor the movements of the earth's crust to millimeter accuracy, it also provides accurate survey control points to Japanese surveyors, who will be able to access surveying data through an online bulletin board service.
5700 CORS GPS Reference Station System
The standard 5700 CORS system provides reference station data, in both real-time as well as logged internal memory for post-processing. Applications include deformation monitoring, engineering and construction projects, surveying, geodetic and atmospheric research, mapping and Geographic Information System (GIS) data collection. In addition, the reference station can be used to establish RTK infrastructure including the Trimble VRS.
At the heart of the system is an all-new, low-power GPS receiver built around Trimble's latest generation Maxwell 4 ASIC technology which also incorporates WAAS/EGNOS capability. The new chip provides higher speed, longer battery life, better satellite tracking and higher precision in extreme environments and is housed in an extremely rugged, fully-sealed, waterproof, magnesium alloy housing. The receiver is ideal for permanent or temporary installation in all types of conditions.
Trimble's GPS CORS system also breaks new ground with the Zephyr Geodetic antenna which utilizes the patented Trimble 4-point antenna feed technology, providing excellent phase center stability as well as enhanced multipath rejection and low elevation satellite tracking. The Zephyr Geodetic antenna also features the patented Trimble StealthTM Ground Plane technology. This revolutionary design mitigates multipath signals using technology similar to that used by Stealth aircraft to hide from radar.
About Trimble's Engineering and Construction Division
The combination of Trimble and Spectra Precision, the world leaders in GPS, construction lasers, robotic total stations and machine control solutions, is creating a broad range of innovative solutions that will change the way construction work is done. The Engineering and Construction Division of Trimble is focusing on the development of technology and solutions in the core areas of machine control, surveying, and construction instruments. From concept to completion, Trimble's integrated systems streamline jobs and improve productivity.
About Trimble
Trimble is a leading innovator of Global Positioning System (GPS) technology. In addition to providing advanced GPS components, Trimble augments GPS with other positioning technologies as well as wireless communications and software to create complete customer solutions. Trimble's worldwide presence and unique capabilities position the Company for growth in emerging applications including surveying, automobile navigation, machine guidance, asset tracking, wireless platforms, and telecommunications infrastructure. Founded in 1978 and headquartered in Sunnyvale, Calif., Trimble has more than 2,000 employees in more than 20 countries worldwide.

Investor Contact:  Investor Relations of Trimble: 408-481-6914

Media Contact:   LeaAnn McNabb of Trimble: 408-481-7808

Contact:   Mary Carmody of Chisano Marketing: 937-866-4914

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