C4iSR: Land

Safran reveals Geonyx inertial navigation system for assured PNT

19 June 2018

Safran has developed a new family of inertial navigation and pointing systems for land vehicles, called Geonyx, which was launched at the Eurosatory 2018 exhibition in Paris.

Geonyx provides alternative assured position, navigation, and timing (APNT) if global navigational satellite systems (GNSS) such as GPS or Galileo are unavailable due to physical constraints, jamming, or spoofing. It can be used autonomously or in a hybrid configuration in conjunction with GNSS.Safran’s Geonyx land platform inertial navigation system launched at Eurosatory 2018. (Safran)Safran’s Geonyx land platform inertial navigation system launched at Eurosatory 2018. (Safran)

The system is based on Safran’s Crystal hemispherical resonator gyro (HRG) that has been used in a range of applications in multiple domains for several years, such as in missile guidance and space navigation. The HRG measures the rotation of a platform to calculate its exact position and attitude. A stationary resonance wave is maintained electronically inside a silica hemisphere (a resonator). This wave remains fixed in relation to an inertial reference, such as stars. By measuring the relative angle between the vibration plane and the resonator, the rotation of the platform can be calculated and its position and orientation deduced.

The new Geonyx family has three versions: Geonyx SP, HP, and XP, which have been specifically designed for land platforms. These versions have different degrees of accuracy within the same form factor. For example, the SP has a heading accuracy of 2 mils while the XP’s is .9 mils (all root mean square [RMS]). The device weighs 6 kg, has a volume of 5 litres, and a power consumption of 15 watts.

Ethernet and CAN-BUS interfaces enable the Geonyx to be integrated into command-and-control systems and vehicle electronic architectures. The device is rugged enough to be installed on artillery pieces.

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