20 Glossary D
Correction service
A service which provides corrections to create a higher GPS accuracy.
CORS network
Continuously Operating Reference Station. A network of GPS/GNSS reference stations situated
within the coverage area to transmit RTK (Real-Time Kinetic) corrections to the cellular modem. The
distance between the reference stations and the modem on the vehicle does not affect accuracy.
CORS works well in areas with spotty RTK radio tower coverage.
Curved line
A guidance line you define on your field. You begin recording and drive until you are at the end of
the curved line or segment, then stop recording. Guidance lines are for use with automated
steering.
Cut
A point on the field where dirt needs to be removed. A cut occurs when the existing field is higher
than the proposed field surface.
Cut/Fill ratio
Difference between the blade height (1) and the target height (4):
When cut (dirt to be removed) is displayed, the current ground is above the target. The height
indicator arrow turns red and points down, which means that the blade needs to move down
to reach the target height.
When fill (dirt to be replaced) is displayed, the current ground is below the target. The height
indicator arrow turns red and points up, which means that the blade needs to move up to
reach the target height.
D
Data Dictionary
A set of data that contains categories for entry data when you are setting up client, farm, field and
event.
Design height
The height of the land called for in a design.
Design slope
The slope of the land called for in a design.
DGNSS
Differential GNSS positioning. The GNSS receiver uses corrections from WAAS/EGNOS satellites or
from OmniSTAR HP, XP, G2, or VBS satellites. These differential systems use special algorithms to
provide differential corrections that allow the rover receiver to calculate its position more
accurately. Not all corrections services support the use of GLONASS satellites in their solution.
DGPS
Differentially corrected Global Positioning System (GPS).
Version 9.25, Revision B FM-1000 Integrated Display User Guide 517
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