Scalable Space Inertial Reference Unit (SSIRU™) Family of Products

The SSIRU™ family of products combines innovation and high reliability—with 100 percent mission success in more than 70 million on-orbit hours—for precision performance on space missions.

The Hemispherical Resonator Gyro (HRG) sensor on the SSIRU™ is composed of three simple machined quartz parts—an outer shell, a high-Q vibrating hemispherical resonator and an inner shell. The quartz construction of the HRG is inherently stable, impervious to aging effects, and naturally radiation hardened. Operating in a completely evacuated hermetically sealed case, the HRG sensor is the ideal gyro for space applications.

The SSIRU™ is the spacecraft manufacturer’s choice for sensor pointing/stabilization and spacecraft attitude control on demanding long-term space missions, including:

• Earth orbits at all altitudes/angles
• Interplanetary missions
• Deep space missions