Technology | Winter 2008
Pay more, get more.
Wondering which guidance system is right for you? Here are some tips from John Deere and Hemisphere GPS, makers of Outback Guidance systems.
Decide whether you want a manual or automatic steering guidance system. With the manual option you drive the equipment with the assistance of a lightbar and/or display screen with vehicle icon and tracking line. An automatic steering system drives the equipment for you. Manual systems are less expensive but automatic steering has a number of benefits including reduced driver fatigue, more accuracy at night and in poor visibility, and consistent efficiency regardless of who is driving the equipment.
The GPS receiver and the type of correction signal you choose will determine your accuracy in the field for various operations such as planting, spraying and harvesting. For instance, John Deere offers three levels of accuracy through its Starfire satellite network: SF1 is a free signal that gives you pass-to-pass accuracy of plus or minus 13 inches; SF2 is offered by subscription and gives you pass-to-pass accuracy of plus or minus four inches; and RTK (real time kinematic), a ground-based correctional signal, gives you sub-inch accuracy.
Most equipment dealers will offer demos on your farm so you can really get a flavour for how each system works and understand its features and benefits. Both Outback and John Deere dealer representatives offer demonstration equipment for use by customers.
Also, check that you can get free software upgrades so you can stay up to date with the latest features and add components to your system as your needs change.
