Units were reliable, with no failures in the harsh Arctic conditions. They have been running continuously for over a year without requiring power cycling etc.

Dr. Martin Doble

Marginal Ice Zone (MIZ) Program

Over recent decades the Arctic has warmed more than any other region leading to significant reduction in sea ice volume. The combination of increased ice-free area and more mobile ice cover has led to the emergence of a seasonal marginal ice zone (MIZ) in the Beaufort Sea. The Office of Naval Research MIZ initiative engages an integrated program of observations and simulations to investigate the ice–ocean– atmosphere dynamics with several autonomous systems including wave buoys.


IG-500A to Study Waves Characteristics

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 winter. “We needed a very rapid and cost-effective solution to measuring directional wave spectra in the ocean. Time to deployment was very short, so an integrated solution, giving us good heave numbers straight out of the box, was essential. Delivery time of the units was also critical”, indicates Dr. Martin Doble, oceanographer at the French UPMC School and member of the research program.

When Temperature Calibration Makes Sense

The IG-500A inertial sensors were used here for wave height and direction. IG- 500A measures in real-time roll, pitch, heading accurate to 0.35°, and heave, accurate to 10 cm. Every sensor is calibrated for bias, linearity, gain, misalignment, cross-axis and gyro-g from -40° to +85°C. It allows them to provide reliable data in harsh environment, and what can be harsher than the Arctic ice?

We needed a very rapid and cost-effective solution to measuring directional wave spectra in the ocean.

Dr. Martin Doble

IG-500A VS Ellipse-A: High Performance Miniature AHRS

During the project, the Ellipse Series was released, a new line replacing the IG-500 series. More accurate in attitude and more reliable (IP68) for the same budget, the new miniature inertial sensors now provide a heave that automatically adjusts to the wave period for higher performance.


Orientation + Heave

  • 0.1° Roll and Pitch over 360°
  • 0.8° Heading (Internal Magnetometers)
  • 5 cm Real-time Heave
  • Available in a Light Enclosure (OEM)
  • Full Development Kit >>
  • ROS Driver
More info ››