GeoSteer®
91
PN 2006410—ENG Rev. B
CAP
Customer Application Programming Interface. It defines communication protocol
between Display and steering ECU.
CDMA
Code Division Multiple Access
—This is a radio communication technology
used by cell phones to transmit voice or data.
Cell Modem
This is a wireless adapter device that sends data across a cellular network system.
CMR+
Compact Measurement
—This is a standardized communication
protocol for transmitting Base Station correction data. This is a universal format
that many GPS manufacturers are capable of transmitting and receiving
Convergence
This is the process of taking differentially corrected information from WAAS,
EGNOS, OmniSTAR, etc. and improving the accuracy of the GPS position.
Convergence is a process that may take many minutes to fully reach full accuracy
levels.
Cross-Track Error
Also called XTE. This is the calculated error between what the actual position is
compared to what it should be (ex. how far off the current guidance path is the
vehicle).
Curvature
This is a measure of the amount of change in heading an object has as compared
to a straight line.
DC
Direct Current
—This is a form of electrical current where the electrical charge
flows in the same direction. This type of current is usually used in batteries and
vehicle systems.
Dead Band
This is a range of a control signal when no action occurs in actuator.
DGPS
Differential Global Positioning System
—This is any system that utilizes Bases
Stations at known geographic locations to improve GPS positioning accuracy.
Display
This is an operator interface device with a screen and control capability. It
connects to the AutoSteer system to provide guidance for automatic vehicle
steering functionality.
DOD
Department Of Defense
—Department of the United States government that
monitors and controls the GPS system.
DOP
Dilution Of Precision
—This is a term that describes the overall quality of a GPS
position based on the satellite geometry that is used to calculate it. A value of 1 to
2 is excellent, 2-5 is good, 5-10 is Moderate, 10-20 is fair, and anything over 20 is
poor. AutoSteering should be performed when the DOP is below 4 for best results.
ECU
Electronic Control Unit
—This is a generic term for a device that controls one or
more of the electrical systems or subsystems.
ECU-2
This is a Novariant proprietary ECU used to communicate with the OnTrac2
Mechanical Steering Unit.
ECU-4
This is a Novariant proprietary ECU that interfaces between the vehicle
components such as the steering valve, wheel angle sensor, steering encoder,
pressure transducer, etc. and the GeoSteer system.
EGNOS
European Geostationary Navigation Overlay Service
—This is a space based
GPS correction source developed by the European Space Agency to augment the
GPS and improve position accuracy. EGNOS is only available over Europe. The
EGNOS satellites are geostationary and transmit correction data from ground
based monitoring system to GPS receivers to provide real time, wide area
corrected positions.
ESSID
Extended Service Set Identifier
—This is the name of a specific WiFi network.
Feature Code
These are unlock codes that allow additional features to be enabled/activated on
the GeoSteer system.
Fix
A state when the satellite positioning system has calculated its current location.