Appendix H General Terminology - Leica TPS1200 series Technical Reference Manual

General Terminology
Appendix H
Glossary of terms
General Terminology
Term Description
GPS Mode • SmartStation always switches to GPS mode when measuring real-time.
GPS Point • Points measured by SmartStation in GPS mode.
• The coordinates of GPS points are always stored in the WGS84 coor-
dinates system. This is a three dimensional system Cartesian coordi-
nate system with the origin at the centre of the Earth. WGS84 coordi-
nates are given as X,Y,Z Cartesian coordinates, or latitude, longitude
and height (above the WGS84 ellipsoid).
• GPS Points are stored as class MEAS or class NAV:
• Class MEAS: If there are 5 or more satellites and if the distance to
the reference is not too great for the prevailing ionospheric condi-
tions, SmartStation will compute a GPS real-time position. The CQ
indicator for this type of point is about 0.01 m to 0.05 m.
• Class NAV: If the reference stops working, or if the communication
link between the reference and SmartStation fails, SmartStation will
only compute a navigation position. The CQ indicator for this type of
point is about 3 m to 20 m.
TPS Mode • SmartStation always switches to TPS mode when measuring angles
and distances.
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