Ag leader technology – Ag Leader GPS 2100 Operators Manual User Manual
Page 7
GPS 2000/2100
Introduction
Ag Leader Technology
April 1998
1-3
What is GPS?
GPS is the acronym for Global Positioning System. The GPS system
consists of 24 orbital satellites that are used to determine positioning on
earth. GPS receiver units, such as the GPS 2000/2100, use these satellites to
provide position data as you harvest, thus helping to map your movements
in the field.
What is DGPS?
DGPS is the acronym for Differential GPS. This is a correction system that
allows your position to be calculated more accurately than with only GPS
signals. DGPS signals can originate from varying sources.
One form of correction originates from Medium Frequency (MF)
radiobeacons. These beacons are located worldwide, free, and are run by the
Army Corps of Engineers and the Coast Guard in the United States. The
GPS 2000 uses the free MF radiobeacon system for its DGPS.
Another form of correction can be obtained from satellites. This correction
type requires a yearly subscription from a satellite correction provider. This
method can provide a higher degree of accuracy in some coverage areas and
allows for usage in areas not currently serviced by the MF radiobeacons.
The GPS 2100 has the ability to use either of these methods of differential
correction.
GPS 2000 Features
•
The GPS 2000 unit contains a combined twelve-channel GPS and
radiobeacon receiver board. It uses DSP, Digital Signal Processing, for
the radiobeacon signals, and it tracks two beacons at all times. Trimble
Navigation, the leading company making GPS receivers, manufactures
the receiver board.
•
The system has a Trimble combined GPS/DGPS antenna.
•
The unit features a graphics display and keypad.
•
The unit is programmable, which means it can be updated in the future
to meet the user’s needs.
GPS 2100 Features
•
The GPS 2100 has all the features listed above for the GPS 2000.
•
Has the ability to also use satellite based differential correction.
•
Choice between using either Omnistar or Racal to provide the
differential correction service.