NavCom SF-2040 Rev.E User Manual
Page 13
SF-2040 User Guide - Rev. E
A horizontal geodetic datum may consist of the
longitude and latitude of an initial point (origin); an
azimuth of a line (direction) to some other triangulation
station; the parameters (radius and flattening) of the
ellipsoid selected for the computations; and the geoid
separation at the origin. A change in any of these
quantities affects every point on the datum. For this
reason, while positions within a system are directly and
accurately relatable, data such as distance and azimuth
derived from computations involving geodetic positions
on different datums will be in error in proportion to the
difference in the initial quantities.
RTK Extend™
RTK Extend™ enables continuous RTK position accuracy
during radio communication outages by utilizing
NavCom’s global StarFire™ corrections. Traditionally,
when an RTK rover loses communication with the base
station, it is unable to continue to provide position
updates for more than a few seconds, resulting in user
down-time and reduced productivity. Through a
revolutionary technique called RTK Extend™, a
NavCom StarFire™ receiver, operating in RTK mode,
can transition to RTK Extend™ mode and maintain
centimeter accurate positioning during communication
loss for up to 15 minutes. RTK Extend™ allows the user
to work more efficiently and without interruption, thus
enabling them to concentrate on the work rather than
the tools.
Positioning Flexibility
The SF-2040 is capable of using two internal
Satellite
Based Augmentation System
(
SBAS
) channels that
provide
Wide Area Augmentation System (WAAS)
or
European Geostationary Navigation Overlay Service
(EGNOS)
code corrections. The SF-2040 configures
1-11