High-precision attitude determination for small to medium spacecraft.

The ST-100 is a flight-proven, autonomous star tracker designed to provide high-accuracy, high-availability attitude knowledge for Earth-orbiting and deep-space missions. Built for LEO, SSO, GEO, and cislunar platforms, the ST-100 combines a radiation-tolerant CMOS imager, onboard star catalog, and real-time pattern recognition to deliver arc-second-level attitude solutions with minimal integration burden.

The ST-100 is optimized for missions requiring stable pointing for optical payloads, precise inertial navigation, or high-accuracy ADCS closed-loop control.

Key Capabilities

• High-accuracy attitude knowledge down to ≤ 8 arcsec (1σ)

• Autonomous lost-in-space acquisition

• High stray-light rejection for Earth limb, Sun, and Moon

• Robust star pattern matching with onboard catalog

• Radiation-tolerant electronics for long-duration missions

• Fast solution convergence after eclipse exit and safe-mode recovery

Typical Applications

• Earth-observation spacecraft

• Optical imaging and hyperspectral payloads

• SmallSat and ESPA-class missions

• Deep-space probes and cislunar platforms

• Precision pointing ADCS architectures

<iframe width="560" height="315" src="https://www.youtube.com/embed/DyuagkBdESU?si=UU-FHKnM5sTCm3cV" title="YouTube video player" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe>