Leica MX400 Operating Instructions Manual page 221

Operator's Manual
The difference between the expected satellite range and the
measured satellite range for the last measurement taken from
each satellite in the constellation.
REFERENCE COMPASS
The compass against which the steering compass (see STEER-
ING COMPASS) may be calibrated.
REFERENCE ELLIPSOID
A mathematical description of the earth's ellipsoidal shape (see
ELLIPSOID), which is the reference frame for positioning
computation.
REFERENCE GPS MONITOR
A GPS receiver whose precise (surveyed) position is known. It
compares its own GPS position solution to the surveyed position
and generated correction values as a function of the position
coordinate differentials. The correction values are transmitted to
user GPS receivers for use as corrections to their own GPS
position solutions.
RESET
To return stored values to either the default value or zero in
memory.
RHUMB LINE
The course of a vessel that keeps a constant compass direction,
drawn as a line on a chart or globe and cutting across all
meridians at the same angle. A rhumb line is a straight line on a
mercator chart.
RHUMB LINE NAVIGATION
Navigation based on Rhumb Lines. See also GREAT CIRCLE
NAVIGATION.
RMS
See ROOT MEAN SQUARED.
ROOT MEAN SQUARED (RMS)
A statistical measure of probability, stating that an expected
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Glossary
Version 3.3