Solar MEMS Technologies continues to strengthen the position in the spacecraft attitude determination and navigation sector through the development of advanced MEMS-based sun sensors, star trackers and precision sensing solutions for space and defense applications. Founded in 2009 and headquartered in Seville, Spain, the company specializes in compact, high-accuracy attitude determination technologies that support satellite orientation, navigation and control across a broad range of orbital missions. Solar MEMS has focused its technology development on addressing these requirements through specialized attitude determination sensors designed for CubeSats, nanosatellites, microsatellites, scientific missions, Earth observation platforms and defense-related spacecraft.
The company’s product portfolio centers on high-performance sun sensors and star trackers that provide critical orientation data for spacecraft Attitude Determination and Control Systems (ADCS). These systems enable satellites to determine their position relative to the Sun and surrounding star fields, allowing precise spacecraft pointing, stabilization, power optimization and mission execution. At the core of Solar MEMS’ technology portfolio is the expertise in Micro-Electro-Mechanical Systems (MEMS)-based sun sensor development. These sensors are designed to provide highly accurate measurements of solar incidence angles while maintaining extremely small size, weight and power requirements. Sun sensors remain one of the most important components within spacecraft attitude determination systems because they provide continuous reference information regarding the spacecraft’s orientation relative to the Sun. This information is essential for solar array pointing, spacecraft stabilization, power management and overall mission control. Solar MEMS has focused on miniaturizing these systems while maintaining high measurement precision. The company’s sensors are engineered to operate in demanding orbital environments characterized by radiation exposure, temperature fluctuations, vacuum conditions and long-duration operational requirements. Their compact architecture enables integration into space-constrained satellite platforms without significantly impacting payload capacity or mission resources. A key advantage of the company’s technology is the ability to deliver rapid sensing performance while maintaining low power consumption. This capability is particularly important for small satellites where onboard power budgets and system resources are often limited. The company’s engineering approach emphasizes both performance and ruggedness, ensuring that sensors can maintain operational accuracy throughout mission lifecycles in low Earth orbit, geostationary orbit and deep-space environments.
Solar MEMS has developed a range of sun sensor technologies capable of delivering highly accurate angular measurements for spacecraft orientation applications. Among the company’s notable solutions are the Advanced Coarse Sun Sensor (ACSS) and the High-Performance Digital Sun Sensor DSS-BR. These systems combine real-time data acquisition, onboard processing and advanced calibration methodologies to provide reliable attitude information throughout spacecraft operations. The DSS-BR series in particular has been developed to deliver digital output capabilities while maintaining high accuracy and operational robustness. These sensors are intended to support missions where reliable attitude information is critical for imaging payloads, scientific observations, telecommunications operations and Earth observation activities. The ACSS platform provides broader field-of-view capabilities while maintaining precise measurement performance, enabling spacecraft operators to obtain reliable Sun reference data across a wide range of mission scenarios. Through extensive calibration and testing procedures, Solar MEMS aims to ensure stable sensor performance under varying environmental conditions encountered during launch, orbital operations and long-duration space missions. In addition to sun sensors, Solar MEMS has expanded the capabilities through the development of compact star tracker systems designed for advanced spacecraft navigation. Star trackers are among the most accurate attitude determination instruments available for spacecraft operations. By imaging star fields and comparing observed patterns against onboard catalogs, these systems can determine spacecraft orientation with exceptional precision. Solar MEMS has focused on developing compact and lightweight star tracker architectures suitable for small satellite platforms while maintaining the performance levels required for demanding missions. The company’s approach aligns with broader industry trends toward miniaturization and increased capability within the NewSpace sector.
When integrated with sun sensors and other navigation systems, star trackers provide complementary attitude information that enhances spacecraft pointing accuracy, mission autonomy and overall navigation performance. These systems support applications including Earth observation imaging, scientific missions, communications satellites, technology demonstration missions and defense-oriented space programs where precise orientation control is essential. Solar MEMS offers a broad range of sensing products designed for multiple spacecraft categories and mission profiles. The S2S Series and DSS-BR Series sun sensors are designed to provide high-precision solar tracking capabilities within compact and lightweight packages. These products are particularly suited for modern satellite constellations, CubeSat missions, Earth observation systems and scientific spacecraft requiring efficient attitude determination solutions. The company’s products are designed with integration flexibility in mind, enabling spacecraft manufacturers to incorporate sensors into a variety of satellite architectures without extensive redesign requirements. This ease of integration helps reduce development complexity and supports faster mission deployment timelines. The company’s sensors have applications in solar tracking systems, autonomous vehicles, defense monitoring equipment and other precision positioning systems requiring accurate directional sensing capabilities. This versatility has allowed Solar MEMS to expand the technology footprint across multiple industries while maintaining the primary focus on aerospace and space systems. The company’s products have been integrated into missions involving scientific research, Earth observation, technology demonstration and defense-related satellite operations. These deployments have provided operational validation for the company’s sensing technologies while supporting continued product refinement and development.
Solar MEMS has supplied sensors to both government agencies and commercial organizations operating across Europe, Asia and the Americas. This international customer base reflects the broader adoption of compact attitude determination technologies within the global small satellite sector. The company’s experience supporting diverse mission requirements has also strengthened the ability to provide customized sensor solutions designed to specific customer objectives and spacecraft architectures. The company has participated in multiple projects involving the European Space Agency (ESA) and other international partners focused on advancing spacecraft sensing technologies and validating next-generation navigation systems. These collaborations have contributed to improvements in sensor accuracy, calibration methodologies, radiation tolerance and operational robustness. Radiation resilience remains particularly important for long-duration missions, where sensor performance must be maintained despite prolonged exposure to harsh space environments. Recent project activities have included support for innovative satellite missions involving multispectral Earth imaging applications, highlighting the expanding commercial relevance of the company’s sensing technologies within the Earth observation sector. The company is focusing on production growth while continuing development efforts related to sensor miniaturization, advanced calibration techniques and integration with increasingly autonomous satellite platforms. The rapid expansion of low Earth orbit satellite constellations has increased demand for compact, reliable and cost-effective attitude determination systems. Through the portfolio of MEMS-based sun sensors, compact star trackers and customized sensing solutions, Solar MEMS continues to provide technologies that support spacecraft orientation, navigation and mission control across commercial, scientific, civil and defense applications. By combining miniaturized designs, high measurement accuracy, low power consumption and proven operational reliability, the company is contributing to the development of next-generation spacecraft guidance and control systems that enable increasingly capable and efficient space missions worldwide.
About Solar MEMS Technologies
Solar MEMS Technologies is a space technology company headquartered in Seville that specializes in the development and manufacturing of sun sensors, star trackers and attitude determination solutions for space and defense applications. Founded in 2009, the company focuses on providing compact, high-precision navigation and orientation technologies for satellites, spacecraft and advanced aerospace systems. The product portfolio includes MEMS-based sun sensors, digital sun sensors, coarse sun sensors and compact star trackers designed to support spacecraft Attitude Determination and Control Systems (ADCS). These technologies are engineered for CubeSats, nanosatellites, microsatellites, Earth observation missions, scientific spacecraft and defense platforms, where accurate orientation and positioning are critical for mission success. The company’s sensor solutions are designed to deliver high angular accuracy, low power consumption and compact form factors while operating reliably in demanding space environments. The S2S Series, DSS-BR Series, Advanced Coarse Sun Sensor (ACSS) and star tracker technologies provide spacecraft with precise solar and stellar reference measurements for navigation, stabilization and pointing applications. Solar MEMS has participated in multiple European and international space programs, including collaborations with the European Space Agency and aerospace industry partners. The company continues to support commercial, scientific and government missions through flight-proven sensing technologies, customized solutions and ongoing developments in miniaturized spacecraft navigation systems.
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