NavCom SF-3050 Rev.I - Manual (Page 58)

SF-3050 GNSS Product User Guide – Rev I
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positioning 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 provide centimeter position updates for more than a few seconds, resulting in user
down-time and reduced productivity. With RTK Extend, a NavCom StarFire receiver
operating in RTK mode can transition to RTK Extend mode and maintain centimeter level
positioning during communication loss for up to 15 minutes. RTK Extend allows more
efficient and uninterrupted work, enabling focused concentration on the work rather than
the tools.
RTK Extend is a unique patented technique, not available on any other manufacture r’s
receivers.
 Multi-Format RTK
Refer to Appendix E, Base Network RTK Configuration, in the Sapphire Technical
Reference Manual for detailed instructions.
 User-Defined Datum
Users can check the current datum (a reference surface to be used in defining the 3D
coordinates of a position) or set a specific datum to be used as the position for all PVT
data output. Refer to the Sapphire Technical Reference Manual and the StarUtil 3000
User Guide for detailed instructions on the use of the [DATUM] command.
 Heading
The SF-3050 heading system consists of two SF-3050 receivers connected via a serial
cable. Each receiver’s antenna is located on the platform at the maximum possible
separation. One of the units is configured as a moving base and computes its position 10
times a second using any available augmentation signal. The moving base outputs
position and RTK measurement corrections to
the other unit, which is configured as a
heading rover. The heading rover computes the heading looking from the base antenna
to the rover antenna and outputs the heading and position of both antennae up to a rate
of 10 Hz. Applications include construction equipment such as excavators and marine
applications such as dredging.
 Coordinated Machines
An SF-3050 configured as a moving base is located on a reference platform. An SF-3050
configured as a rover is located on one or more additional platforms. All of the SF-3050
rovers are connected to the moving base via a wireless communication link. The moving
base computes its position 10 times a second using any available augmentation signal.
The moving base outputs position and RTK measurement corrections to the rovers. The
rovers compute the range and bearing to the moving base and output the range and
bearing, plus their position and the position of the moving base, at up to 10 times a
second. Applications include those requiring the relative positions of two or more moving
platforms, such as leader-follower vehicle applications or the relative positions of planes
or marine vessels.
 Data Sampling
GPS (L1, L2, L2C, L5), GLONASS (G1, G2), and SBAS (WAAS, EGNOS, MSAS,
GAGAN) raw measurement data is up to 5Hz in the standard configuration for the SF-