Ntrip Differential Correction - Juniper Geode GNS3 User Manual

Owner's Manual
SBAS corrections—called deviation corrections—allow GPS
receivers to more accurately and reliably determine their
position.
GPS is normally accurate to about five meters, but when
using SBAS user's can achieve an accuracy of two meters or
better. The Geode combines SBAS corrections with complex
smoothing algorithms and full-wave carrier phase tracking
to deliver accuracies better than 60 cm 2DRMS. In other
words, 95–98% of the positions recorded by the Geode will
be within 60 cm of the true point.

2.3.2 NTRIP Differential Correction

NTRIP stands for Network Transport of RTCM via Internet
Protocol. It is the internet version of Real-Time Kinematic
(RTK) Positioning. Where available, RTK and CORS networks
stream data corrections over the internet, allowing the
Geode to calculate an RTK Float position solution with
differential GNSS accuracy.
Conventional RTK includes
very precise and highly
accurate methods used by
land surveyors. Surveyors
use a base receiver in
a known location that
continuously receives
positions from GPS
satellites. The base sends
its position data to the
surrounding area via radio.
Another receiver, called a
rover, uses the signal from
the base along with GNSS
satellite signals to calculate
its position based on the
corrections in the signal
from the base station.
NTRIP has been the means for significantly improving RTK's
applicability. Historically, the RTK model has been limited
because it has been dependent on point-to-point radio
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Chapter 2 Geode Features