Chapter 2 Geode Features 9
Owner's Manual
a fix on multiple satellites
simultaneously, even
under thick canopy or in
the middle of a densely
populated city block. With
more satellites available
to the Geode, total data
sets in challenging
environments are
consistently higher quality.
The Multi-GNSS
configuration of the
GNS3 makes the Geode’s
ability to deliver real-time
sub-meter, sub-foot, or
decimeter accuracy more
reliable under what used to
be considered “less-than-
ideal” circumstances.
Note: GNSS accuracy is
subject to observation
conditions, multipath
environment, number
of satellites in view, satellite geometry, and ionospheric
activity.
2.3 GNSS Augmentation
GNSS data (including GPS) will unavoidably have errors in it.
Sources of GNSS error include:
■ Deviations in GNSS satellite orbits
■ Inaccurate clocks on the GNSS satellites
■ Ionospheric activity that changes daily and hourly
■ Interference of satellite signals that creates noise in the
multipath environment
When a manufacturer touts a receiver’s accuracy, it is
usually referencing the receiver’s accuracy under ideal
conditions. These ideal conditions minimize sources of error.
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