C-Nav3050 User Guide

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C-Nav3050 User Guide | Manualzz

C-Nav3050 User Guide

MDE: Marginally Detectable Error

SET: Solid Earth Tide

Unique Features

The C-Nav3050 GNSS sensor has many unique features:

Performance Upgrade Path

The C-Nav3050 is designed with a robust and long-term performance upgrade path to meet changing needs via software upgrades. Increased functionality does not typically require the purchase of additional hardware. The C-Nav3050 software-enabled features cover a wide variety of applications

C-Nav Corrections Service (CCS)

The ability to receive C-Nav Corrections Service (CCS) signals is fully integrated within each unit. A single set of corrections can be used globally enabling a user to achieve decimeter level positioning accuracy without the need to deploy a separate base station, thus saving time and capital expenditure. C-Nav position

outputs are referenced to the ITRF-08 datum. Refer to Appendix C - C-Nav

Corrections Service (CCS) (Page 104 ) for more information.

Over-The-Air C-Nav Licensing

Over-the-Air C-Nav licensing is the easiest way to install a C-Nav license. The installation of a purchased license is accomplished via radio broadcast. Overthe-Air C-Nav Licensing is especially convenient for receivers in remote locations in the field.

C-Nav Corrections Service Over-The-Internet (CCS OTI)

This is a new option offered for the C-Nav3050. The C-Nav Corrections Service

(CCS) signals can also be received over the Internet as C-Nav Corrections

Service Over-The-Internet (CCS OTI). This feature allows the user to request messages from an independent NTRIP server / caster and can choose between four data delivery rates (1 s, 15 s, 30 s, and 60 s) for maximum ability. Refer to

Appendix C - C-Nav Corrections Service (CCS) (Page 104 ) for more information.


The RTK / UltraRTK algorithm provides fast initialization and the ultra-compact binary data format for RTK / UltraRTK ensures robust data throughput. The C-



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C-Nav3050 User Guide

Nav3050 is capable of outputting or accepting legacy 0x5B (RTK) or 0x5E

(UltraRTK) binary formats.

Positioning Flexibility

The C-Nav3050 is capable of using WAAS, EGNOS, MSAS, and GAGAN (RTCA

/ DO-229 D compliant) code corrections via two internal Satellite Based

Augmentation System (SBAS) channels. The C-Nav3050 automatically configures to use the most suitable correction source available and changes as the survey dictates (this feature can be overridden).

RTK Extend™

RTK Extend enables continuous RTK-level positioning accuracy during radio communication outages by utilizing the global C-Nav Corrections Service (CCS).

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 downtime and reduced productivity. With RTK Extend, a C-Nav 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 manufacturer’s receivers.

Multi-Format RTK

Contact C-Nav Support for more information on Multi-Format RTK and its applications.

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. Contact C-Nav Support for more information.


The C-Nav3050 heading system consists of two C-Nav3050 receivers connected via either a serial cable or through one of the four ETH Ports (ETH1 through ETH


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



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C-Nav3050 User Guide position ten times per second (10 Hz) 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

A C-Nav3050 configured as a moving base is located on a reference platform. A

C-Nav3050 configured as a rover is located on one or more additional platforms.

All of the C-Nav3050 rovers are connected to the moving base via wireless communication link. The moving base computes its position ten times per second (10 Hz) 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 ten times per second (10 Hz). 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 and PVT data is up to 5 Hz in the standard

C-Nav GNSS Sensor Kit. Optional upgrades allow 10, 25, 50, and 100 Hz raw measurement and PVT data via high-speed ports for highly dynamic applications.

Internal Memory

Contact C-Nav Support for information on utilizing the C-Nav3050 internal memory flash drive.

Ethernet Connection

An Ethernet connection may be setup for the C-Nav3050. Contact C-Nav

Support for instructions on configuring and establishing an Ethernet connection.



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C-Nav3050 User Guide

Control of Power Consumption

Power consumption may be immediately reduced on the C-Nav3050 by disabling signals, as necessary, using C-Nav proprietary controller software. Contact C-

Nav Support for more information.

Continuously Operating Reference Station (CORS) Support

When optioned as an RTK Base Station, the C-Nav3050 is capable of computing and outputting RTK message streams in multiple formats and raw satellite measurement data for post-processing simultaneously. All message formats can be output on one of the high-speed USB or Ethernet ports, or messages can be distributed among any of the eight user ports. For IGS or similar permanent

Base applications, C-Nav offers a Choke Ring antenna option to significantly reduce multipath errors on signal reception.

NTRIP Support

The generation of differential GNSS correction data is usually done directly on the GNSS receiver of a reference station, but this data can also be derived from observations obtained by networked reference stations. The combined data stream is then fed into a network computer and made available on the internet.

Contact C-Nav Support for more information on NTRIP and the C-Nav3050 receiver.

GNSS Performance

The C-Nav3050 utilizes the Sapphire GNSS engine, which incorporates several patented innovations.

Sapphire’s industry leading receiver sensitivity provides more than 50% signal to noise ratio advantage over competing technologies.

This results in improved real time positioning, proven through independent tests, when facing various multipath environments.

Rugged Design

Units have been tested to conform to MIL-STD-810F for low pressure, solar radiation, rain, humidity, salt-fog, sand, and dust. In addition, the unit is IP certified to the IP67 level (compliant only when cables are connected

The rugged design of the C-Nav3050 system components provide protection against the harsh environment common to areas such as construction sites, offshore vessels, and mines.



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