SBG Ellipse D Marine Inertial Navigation System

The SBG Ellipse D Marine inertial navigation unit is a compact and rugged GNSS navigation system. It integrates an inertial measurement unit (IMU) and a dual-band, multi-constellation GNSS receiver with dual antenna. It is designed to provide accurate and reliable position, orientation, and heave compensation, even in harsh marine environments.

In RTK (Real-Time Kinematic) mode, the SBG Ellipse D Marine inertial navigation system delivers high precision:

Horizontal position: 0.01 mVertical position: 0.02 mRoll/Pitch: 0.05°Heading: 0.2°It also features auto-adjusting heave compensation with an accuracy of 5 cm or 5% (whichever is greater), for wave periods ranging from 0 to 20 seconds.

Yes, the Ellipse D Marine IMU housing version is designed for robustness and resistance to demanding environments. It features an IP68 rating, making it resistant to dust and water ingress. It operates within a temperature range of -40 °C to 85 °C and withstands shocks of 500 g (0.1 ms) and vibrations of 8 g RMS (20 Hz to 2 kHz per MIL-STD 810G).

The Ellipse D Marine IMU is compatible with multiple satellite navigation systems for global coverage and improved accuracy. It supports the following signals:

GPS: L1C/A, L2C
GALILEO: E1, E5b
GLONASS: L1OF, L2OF
BEIDOU: B1/B2
It also includes advanced jamming and spoofing mitigation features and is OSNMA-compatible.

The enclosure version of the Ellipse D Marine IMU has compact dimensions of 46 mm (length) x 45 mm (width) x 32 mm (height). Its weight is 65 g, making it easy to integrate into various marine or embedded systems.

The Ellipse D Marine IMU provides multiple communication interfaces for flexible integration:

Serial interfaces: RS-232, RS-422, USB (up to 2 Mbps)CAN interface: CAN 2.0 A/B (up to 1 Mbps)Sync I/O: 2 Sync inputs (RS232), 1 Sync output (TTL)It supports protocols such as NMEA, sbgEcom (binary), and REST API, with an IMU and INS output rate of 1 kHz.

The Ellipse D Marine autopilot can be connected to various external sensors to enhance its navigation accuracy and robustness. Supported input aids include:

GNSS (external receiver)RTCM (correction messages)OdometerDVL (Doppler Velocity Log)External magnetometersAir data (Air data)Integrating these sensors optimizes positioning accuracy, especially in environments where GNSS signals may be weak or intermittent.

Yes, the SBG Ellipse D Marine inertial navigation system comes with a 2-year warranty. This warranty covers manufacturing defects and ensures product reliability under normal operating conditions.

The Ellipse D Marine IMU is designed to maintain a robust position even during GNSS signal interruptions. Its sensor fusion algorithm combines inertial data with inputs from other external sensors (such as an odometer or DVL) to improve positioning accuracy in challenging environments (under bridges, in tunnels, in forests, etc.).

In case of prolonged GNSS outage, position accuracy can be maintained with the following performance, provided external aiding inputs are used:

Land application: 0.5% of distance traveledMarine application: 1.0% of distance traveledAerial application: 2.0% of distance traveled

Yes, for post-processing the data and improving the IMU’s performance, Qinertia software is recommended. This post-processing software refines inertial data using raw GNSS observations, providing high-precision positioning and orientation solutions via PPK (Post-Processed Kinematic) and PPP (Precise Point Positioning) technologies. There is also a configuration software for initial setup of the device.

The Ellipse D Marine autopilot is compatible with multiple protocols for data output, enabling flexible integration with various systems. The main output protocols include:

NMEA 0183 (binary), REST API, TSS1, SKV, and NMEA 2000. It also supports third-party protocols.

The SBG Ellipse D Marine inertial navigation system requires an input DC voltage between 5 and 36 VDC. Power consumption is less than 1050 mW. For the Ellipse-D version in housing, consumption is less than 900 mW without GNSS antenna.

Although the manual does not specify a single mounting orientation, it is critical to mount the Ellipse D Marine IMU in a stable position and protected from excessive vibration to ensure optimal accuracy, even though it is designed to withstand vibrations (8 g RMS). The IP68-rated housing makes it dust- and water-resistant, allowing installation in demanding environments.

Additionally, the IMU integrates a magnetometer that requires a single calibration after installation to ensure optimal performance.

Yes, the Ellipse D Marine IMU integrates advanced features to detect and mitigate GNSS signal jamming and spoofing. It provides real-time indicators to alert users of potential interference or signal manipulation. Additionally, it is compatible with the OSNMA (Open Service Navigation Message Authentication) standard, thereby enhancing the reliability of GNSS data.

For optimal integration and performance of the Ellipse D Marine INS, SBG Systems offers a range of complementary accessories:

Cables: A variety of high-quality cables is available, including plug-and-play cables for simplified installation, open-end cables for custom connections, and GNSS antenna cables to ensure optimal signal quality.

GNSS antennas: A selection of high-performance GNSS antennas, tested and validated by SBG Systems, is offered for seamless integration with INS/GNSS products, ensuring reliable positioning and robust signal tracking in various environments.