Topcon mmGPS 3D Paver, Reference Manual

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Getting Started
mmGPS 3D Paver Reference Manual
5-18
• Turning counterclockwise decreases the valve offset value.
Figure 5-12. Setting Valve Offset Values
5. Press the
Set
key for each of the remaining selections, repeating
step 3 and step 4 on page 5-17 until all four valve offsets are
complete.
6. Press
OK
to store the calibrations.
GPS Localization
After you have setup all the hardware components and initialized the
Base Station, you need to localize the GPS coordinates to the jobsite’s
coordinates. This section gives information on the principles of GPS
localization and entering GPS localization, into the Control Box.
Principles of GPS Localization
The GPS+ system is capable of precise positioning, but the positions
it computes are relative to a global reference system defined in terms
of a geographic latitude, longitude and height above (a representation
of) the earth’s surface.
To be useful for local site work, global GPS coordinates need to be
converted into local site coordinates, defined in terms of a distance
north and east of some origin point and some distance above an
elevation datum. These north, east, and elevation coordinates (often
NOTICE
You must press Ok to save and store valve offsets;
otherwise, automatic control will not work
correctly.