NavCom SF-3040 Rev.F - Manual (Page 98)

SF-3040 Product User Guide
– Rev. F
4-96
Auxiliary Communication Module (Internal
UHF radio)
An optional 1-Watt internal, removable UHF radio is
available with the SF-3040. (Refer to Chapter 7 for
detailed information). The operational range of the
1W radio varies with the undulation of the
topography, the density of foliage and man-made
materials (i.e. buildings), the type of antenna
employed (NavCom offers a half-wave antenna), and
the height of the base antenna. A broadcast range of
2km is not uncommon, but will vary greatly based on
the operating environment. If a longer range is
desired, NavCom offers a 35W radio option.
Basics of RTK Surveying
RTK (Real-Time Kinematic) is a GNSS system that
yields very accurate 3D position fixes immediately in
real-time.

The Network RTK software option allows
the receiver to generate and receive
RTCM 1000-series messages. The
navigation algorithms are designed to
support single-base correction
configurations. Network adjusted RTK
formats are not currently supported.
A reference station (base station) transmits its GNSS
position to roving receivers as the base receiver
generates them. The roving receivers use the
reference station readings to differentially correct their
own positions. Accuracies of a few centimeters in all
three dimensions are possible. RTK requires
multi-frequency GNSS receivers and high-speed
radio modems.