Cielo Inertial Solutions is a subsidiary of Rafael of Israel and Kearfott of the US, operating from Jerusalem, Israel.

Cielo offers a decade and a half of experience in high-end space navigation systems. The company's Starlight 1000 IRU (previously known as IRU 24) is successfully operating on several LEO satellites, some of them for more than 4 years. The Starlight 1000 Inertial Reference Unit is a space grade, ultra-high performance Inertial Reference Unit (IRU), suited for satellites and space navigation applications. This includes EO, SAR, multispectral, and COMMs satellites, for line-of-sight stabilization, pointing, and guidance applications. It employs the latest closed-loop fiber-optic gyro (FOG) technology.

Cielo is currently working in developing a tactical grade space IMU/IRU - the new IMU42-S. All of Cielo's products are ITAR-free and are built, designed, manufactured, assembled and tested in house.

Cielo's portfolio of capabilities include:

• Sensor and system level solutions
• Closed-loop Fiber Optic Gyros (FOG)
• Closed-loop quartz rebalanced accelerometers
• End-to-end manufacturing
• Engineering from design to production
• End-to-end control of technologies
• Production and calibration capabilities