AHRS – Attitude and Heading Reference Systems

SBG Systems offers a wide line of AHRS suitable whether your applications requirements are size or performance.

What is an Attitude and Heading Reference System (AHRS)

An Attitude and Heading Reference System, also called AHRS, acts as a motion sensor. It contains an IMU (3 gyroscopes, 3 accelerometers, and 3 magnetometers) and adds a central processing unit (CPU) that embeds the Extended Kalman Filter. This allows to calculate highly reliable attitude and heading relative to magnetic north, in addition to roll, pitch, and yaw. Thanks to this sensor fusion, the drift from gyroscopes is compensated by vectors such as gravity and the Earth’s magnetic field.

 

The sensor can be connected to an external GNSS receiver to improve its performance. Indeed, GPS-aided AHRS delivers additional navigation.

Ellipse Micro

Ellipse Micro

Smallest & Economical IMU, AHRS, INS

Ellipse 2 Micro AHRS provides Roll, Pitch, Heading, and Heave. It is calibrated from -40 to 85°C and delivers highly persistent data whether your application is land, marine, or aerospace. Cost-effective, it is designed to suit volume projects.

DISCOVER THE ELLIPSE MICRO SENSORS ››
  • Roll/Pitch: 0.1°
  • Heading: Magnetic or GNSS
  • Position: With External GNSS
Ellipse Series

Ellipse Series

Most Advanced Miniature IMU, AHRS, INS/GNSS

Ellipse2-A is a cost-effective high-performance Attitude and Heading Reference System (AHRS). The Ellipse series not only includes an AHRS but also three GPS-aided AHRS models. Factory calibrated from -40 to 85°C, this robust inertial motion sensor provides Roll, Pitch, Heading, and Heave data.

DISCOVER ALL ELLIPSE SENSORS ››
  • Roll/Pitch: 0.1°
  • Heading: Magnetic or GNSS
  • Position: Meter or Centimeter-level
Ekinox Series

Ekinox Series

Advanced & Compact Inertial Systems

Ekinox-A is an advanced Attitude & Heading Reference System (AHRS) or MRU (Motion Reference Unit). It combines high-end gyroscopes and accelerometers and runs an enhanced Extended Kalman Filter to provide Roll, Pitch, Heave, and Heading.

DISCOVER THE EKINOX SERIES ››
  • Roll/Pitch: 0.02° (RTK)
  • Heading: GNSS based
  • Position: Centimeter-level
Apogee Series

Apogee Series

The Highest Accuracy INS/GNSS & MRU

Apogee-A is a highly accurate Motion Reference Unit (MRU). The Apogee-A is based on the robust and cost-effective MEMS technology and provides precise orientation and heave data.

DISCOVER THE APOGEE SOLUTION ››
  • Roll/Pitch: 0.008° (RTK)
  • Heading: GNSS based
  • Position: Centimeter-level

Ellipse Micro

Smallest & Economical IMU, AHRS, INS

  • Roll/Pitch: 0.1°
  • Heading: Magnetic or GNSS
  • Position: With External GNSS

Ellipse 2 Micro AHRS provides Roll, Pitch, Heading, and Heave. It is calibrated from -40 to 85°C and delivers highly persistent data whether your application is land, marine, or aerospace. Cost-effective, it is designed to suit volume projects.

DISCOVER THE ELLIPSE MICRO SENSORS ››

Ellipse Series

Most Advanced Miniature IMU, AHRS, INS/GNSS

  • Roll/Pitch: 0.1°
  • Heading: Magnetic or GNSS
  • Position: Meter or Centimeter-level

Ellipse2-A is a cost-effective high-performance Attitude and Heading Reference System (AHRS). The Ellipse series not only includes an AHRS but also three GPS-aided AHRS models. Factory calibrated from -40 to 85°C, this robust inertial motion sensor provides Roll, Pitch, Heading, and Heave data.

DISCOVER ALL ELLIPSE SENSORS ››

Ekinox Series

Advanced & Compact Inertial Systems

  • Roll/Pitch: 0.02° (RTK)
  • Heading: GNSS based
  • Position: Centimeter-level

Ekinox-A is an advanced Attitude & Heading Reference System (AHRS) or MRU (Motion Reference Unit). It combines high-end gyroscopes and accelerometers and runs an enhanced Extended Kalman Filter to provide Roll, Pitch, Heave, and Heading.

DISCOVER THE EKINOX SERIES ››

Apogee Series

The Highest Accuracy INS/GNSS & MRU

  • Roll/Pitch: 0.008° (RTK)
  • Heading: GNSS based
  • Position: Centimeter-level

Apogee-A is a highly accurate Motion Reference Unit (MRU). The Apogee-A is based on the robust and cost-effective MEMS technology and provides precise orientation and heave data.

DISCOVER THE APOGEE SOLUTION ››

What Difference between an IMU, an AHRS, and an Inertial Navigation System?

An Inertial Measurement Unit (IMU) is an electronic device that measures and reports acceleration, orientation, angular rates, and other gravitational forces. It is composed of 3 accelerometers, 3 gyroscopes, and depending on the heading requirement – 3 magnetometers. It delivers roll, pitch, and yaw data.

An AHRS adds a central processing unit (CPU) to the IMU. It embeds the Extended Kalman Filter that provides attitude and heading information.

Inertial Navigation Systems (INS) are composed of an IMU and additionally embed a GPS/GNSS receiver. An INS fuses inertial, navigation, and aiding data (odometer, DVL, etc.) thanks to the Extended Kalman Filter. This GNSS and IMU sensor fusion provides roll, pitch, heading, position, and velocity.

 

 

Inertial Navigation Systems with consistent behavior in all conditions

At SBG Systems, every inertial sensor is calibrated in temperature from -40 to 85°C, ensuring a consistent behavior in all environments.

Calibration greatly improves sensor quality:

  • Gain and bias temperature compensation for accelerometers and gyroscopes
  • Gain temperature compensation for magnetometers
  • Cross-axis and misalignment effects compensation for accelerometers, gyroscopes and magnetometers
  • Non linearity correction for gyroscopes
  • Gyro-G effect compensation for gyroscopes

Attitude and Heading Reference System Market

The typical heading reference system market is unmanned aerial vehicles. GPS-aided AHRS sensors are mainly used in aerospace applications such as UAV navigation, UAV-based Surveying etc. Often installed in the aircraft, they are part of the aerospace electronic system during the flight.

Because they act as a motion unit, they can be used for all applications integrating motion tracking and monitoring, such as instrumented buoy or camera orientation.

For the unmanned ground vehicles market, IMUs or GPS-aided inertial navigation systems (integrating dead reckoning) would be the best fit, depending on the accuracy needs of the application.

UAV

UAV-based Survey

Gimbal Camera

Instrumented Buoy

Helideck Motion Monitoring

Boat Motion Monitoring

Resources

Artic Buoys

Wave Buoys in the Arctic Sea Ice

The program included 25 Wave Buoys to quantify open ocean and in-ice wave characteristics and evolution. 20 buoys were deployed in the summer period, 5 in the

Artic Buoys

Wave Buoys in the Arctic Sea Ice

The program included 25 Wave Buoys to quantify open ocean and in-ice wave characteristics and evolution. 20 buoys were deployed in the summer period, 5 in the