Antaris, a space-software company focused on accelerating spacecraft development and operations, highlights SatOS™, the open and modular spacecraft operating environment engineered to reduce complexity in satellite software integration. SatOS is designed to address common challenges faced by satellite builders such as fragmented software stacks, hardware-specific coding requirements, lengthy qualification cycles and high non-recurring engineering (NRE) costs by providing a standardized operating framework that works across multiple satellite buses, payloads and avionics architectures.
Built to integrate seamlessly with modern development pipelines and ground-segment systems, SatOS supports a full lifecycle approach that includes simulation, hardware-in-the-loop testing, flight software deployment, and on-orbit updates. The architecture emphasizes interoperability, security, and reduced development overhead, enabling spacecraft designers, operators and constellation builders to streamline mission timelines while maintaining control over software workflows and system configuration.
Modern Flight Software Designed for Contemporary Space Missions
SatOS™ is a modular spacecraft software environment that applies modern software engineering practices such as open interfaces, containerized services and hardware-agnostic APIs to satellite mission operations. Unlike traditional flight software stacks that rely on tightly coupled, vendor-specific architectures, SatOS separates hardware control, payload management and mission services into independent layers that communicate through standardized APIs. This allows spacecraft developers to integrate avionics, sensors, radios and payload processors from different vendors without custom rewrites of core flight code. SatOS supports automated task execution for activities including attitude control routines, payload scheduling, onboard data processing, health monitoring and telemetry/command workflows. The software orchestrates these functions in real time, enabling satellites to collect, process and transmit mission data with minimal manual intervention. By reducing integration complexity and enabling reusability across missions, SatOS shortens development timelines, lowers non-recurring engineering costs and provides a flexible foundation for small satellites, large spacecraft and constellation-scale deployments.
Open and Modular Architecture for Flexible and Low-Risk Mission Development
SatOS is built around an open and modular software architecture that allows spacecraft developers to integrate, updat and validate system components without the constraints of a monolithic flight-software stack. Each subsystem such as attitude control, payload management, communications or onboard data processing operates as an independent software module connected through well-defined open APIs. This separation enables teams to modify or upgrade individual functions without disrupting overall spacecraft behavior, reducing integration risk and eliminating the need for extensive custom rewrites. The architecture also supports a wide variety of commercial and custom satellite buses, avionics packages and payload electronics, since any hardware compliant with open interface standards can be incorporated into the SatOS environment. This approach enables cost efficiency by shortening software development cycles, simplifying validation and reducing the need for proprietary vendor-specific tooling. SatOS supports both Hardware-in-the-Loop (HIL) and Software-in-the-Loop (SIL) configurations, allowing engineering teams to test operational behaviors early and repeatedly across simulated or physical hardware setups, improving mission reliability and lowering non-recurring engineering expenses.
Scalable and Secure Spaceflight Architecture
SatOS is built as a distributed operating environment that allocates computing tasks across available onboard processors, ensuring that mission functions continue even if individual software components experience faults. This architecture supports satellites hosting multiple payloads, edge-processing workloads, or complex control sequences by allowing each subsystem to operate in a contained, isolated process space. SatOS also incorporates built-in scalability, enabling missions to expand or modify software capabilities without redesigning the core operating system, an advantage for constellation deployments and long-life spacecraft that evolve over time. Security is embedded at every layer of the SatOS framework, including authenticated communications, controlled access to satellite resources, and secure interfaces between onboard systems and ground operators. These protections reinforce the integrity of flight operations and safeguard sensitive mission data, making SatOS suitable for commercial, governmental and defense missions that require resilient and tamper-resistant software environments.
Adaptive to Diverse Spacecraft and Payloads
SatOS was conceived to support a broad range of missions, payload types and spacecraft buses. The open APIs and extensible software stack mean that developers can deploy SatOS on platforms ranging from small satellite constellations to larger spacecraft requiring sophisticated onboard autonomy. The environment supports secure interoperability of components, providing a consistent runtime whether managing a simple sensor payload or coordinating complex multi-sensor and communications subsystems. SatOS abstracts many low-level hardware dependencies, mission integrators can test and integrate alternative software and hardware components with confidence, knowing that standard interfaces will maintain compatibility and performance. This “supply web” approach, where components can be interchanged without complete software redesign and addresses a key pain point in space systems engineering.
Antaris’s SatOS™ provides a modern spacecraft operating environment that combines open APIs, modular architecture, mission automation and robust security into a cohesive software stack. By enabling hardware-agnostic integration, reducing development time and supporting scalable mission workloads, SatOS advances how flight software is developed, tested and maintained for contemporary satellite missions. As space operators embrace more complex, multi-payload and multi-orbital constellations, Antaris’s software infrastructure aims to reduce integration friction and support resilient, cost-effective mission execution.
About Antaris
Antaris Inc., Founded in 2021 and headquartered in California, is a pioneering space technology company focused on software-defined satellite development. The Antaris Space Platform, delivers an integrated ecosystem that connects design, simulation, manufacturing and mission operations through a single digital environment. With a mission to make space accessible, affordable and efficient, Antaris partners with leading aerospace companies, satellite manufacturers and research organizations to enable rapid, scalable satellite deployment. By merging cloud-based collaboration, digital twin modeling and software-driven control, Antaris is shaping the next generation of flexible, intelligent and sustainable space missions.
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