NavCom SF-3050 Rev.A - Manual (Page 104)

SF-3050 User Guide – Rev A
4-102
Basics of RTK Surveying
RTK (Real-Time Kinematic) is a GNSS system that
yields very accurate 3D position fixes immediately in
real-time.
A refe ence station (base station) transmits it
oving receivers as the base recei
tes them. The roving receivers use the
ce station readings to differentially
s. Accuracies
r s GNSS
position to r ver
genera
referen correct their
own position of a few centimeters in all
nt it receives.
The SF- e
s c s re s r
rec c o kin th io
and decoding one of these corre o
3.1 1 01 rk ).
ei le ha al
me ou m a m u
n a tio th m tr .
e ly l te
59
three dimensions are possible. RTK requires
multi-frequency GNSS receivers and high speed
radio modems.
Proper setup of a reference station minimizes GNSS
errors in the rover. The reference GNSS sensor is set
up at a known surveyed location. With this position
locked in, it transmits its code, clock, and reference
station coordinate information to the roving sensor(s).
The roving sensor(s) uses this information to correct
each GNSS measureme
3050S, when configured as a referenc
tation,
roving
an tran
eivers
mit cor
apable
ction
f pic
to any
g up
ction f
numbe
e rad
rmats
of
signal
(NavCom proprietary, RTCM 3.0, CMR, CMR+, or
RTCM
, types 014-1 7 for Netwo RTK
1
The
signal can be rec ved in ss t n ide
environ nts, th gh so e dat loss ay occ r.
Setup of the reference station sensor above the roving
sensors is recommended to enable transmission to all
rovers i
ll direc ns wi mini al obs uction High
frequency radio signals g neral trave a shor r
distance than lower frequency signals, and do not
penetrate obstructions as well over distance. Figure
and Figure 60 illustrate proper and improper RTK
1
Network RTK is not supported in software version 1.0.