TeeJet Alerts Users of Critical Update for GPS Receivers

WHEATON, Ill. – TeeJet Technologies sells and supports GPS receivers utilizing the Wide Area Augmentation System (WAAS), the United States’ free DGPS correction system. WAAS exists primarily to improve the accuracy of GPS for aviation applications, but it is also a convenient and effective solution for agricultural GPS systems.

The WAAS signal is transmitted by geostationary satellites that are completely independent of the GPS satellite system. Two of these satellites (referred to as PRN 122 and PRN 134) were decommissioned on July 30, 2007. Once those satellites ceased broadcasting correction signals, PRN 135 and PRN 138 became the only active WAAS satellites available. Many GPS receivers that have been shipped over the past 5 years will need a configuration change in order to continue receiving the WAAS correction signal from the new satellites.

The TeeJet products affected by this that will require a configuration change are as follows:

• CenterLine® 220 - Part Number 75-30021#### (the last 4 digits are unique serial numbers)

• RX350P Receivers - Part Numbers 78-50104#### and 78-50077#### and 95-78057

• RX360P Receivers - All units and all part numbers

• RX370P Receivers - Part Number 78-50148

• RX400P Receivers - Part Numbers 78-50063 and 95-78023

TeeJet will be exhibiting at a variety of tradeshows this fall and winter; users can bring their GPS receivers to the show to receive free upgrades to any affected products. Competitive product updates can also be made at the exhibit location. For a list of shows where TeeJet will exhibit please visit the News section on-line at www.teejet.com.

Users can also contact their local dealer for assistance with any necessary upgrades or contact TeeJet Technologies Support directly at (217) 747-0235. More information regarding this critical WAAS update can be found online at www.teejet.com.