Hemispherical Resonator Gyro

When spacecraft traverse through the solar system, carrying inertial navigation devices to supplement Earth-based radio navigation, mostly they use a simple but accurate gyro that measures motion by the change in vibration of a cup-shaped device.

Hemispherical Resonator Gyro(HRG) uses acoustic standing waves to derive very accurate angle measurements. HRG has proven itself through trial-by-fire: landing on an asteroid, circling Saturn, etc.

HRG has become the top-choice system for critical and high value missions. Combining the inherent high reliability of crossed-strapped sensor and electronics redundancy, HRG provides an inertial reference system that is virtually infallible. In the field it has demonstrated performance levels that meet or exceed even the most stringent requirements.

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