Asynchronics Releases NeXosim-py

The space industry – particularly the fast-paced NewSpace segment – continues to face challenges in spacecraft validation and mission assurance. Many of these challenges stem from limited access to advanced simulation tools, the high cost of hardware-based testing, and compressed development timelines. NeXosim-py addresses these constraints head-on by enabling full or partial virtualization of spacecraft systems, offering a new integration, verification, and training approach.

NeXosim-py is engineered for use cases such as:

• On-board software validation in realistic mission scenarios,
• Hardware-in-the-loop (HIL) testing with real-time responsiveness,
• Operations and training simulators for mission control teams,
• Large-scale automated scenario testing for fault injection and behavior analysis.

Unlike traditional FlatSat-based setups, which are resource-heavy and limited in scalability, NeXosim-py allows engineers to simulate thousands of scenarios with a single command without requiring physical testbeds. Its asynchronous API enables real-time control and monitoring of simulations – a key requirement for HIL applications and fast feedback loops in agile development pipelines.

“As an industry, we need tools that are not only powerful but also accessible.” said Serge Barral, CEO of Asynchronics. “With NeXosim-py, we bring Python users into the fold, combining intuitive interfaces with the full strength of the NeXosim backend. This is a step forward in our mission to democratize simulation across the space sector.”

At its core, NeXosim is built on an auto-parallelizing simulation engine capable of handling complex spacecraft dynamics and behaviors with high performance. The new Python frontend unleashes this power to system engineers, leveraging the ease-of-use of Python to provide an intuitive and flexible interface suitable from early-stage testing to spacecraft operation.

Key benefits for space companies and R&D teams include:

• Lower cost and faster test cycles: Replace physical setups with digital simulations to iterate more frequently and safely.
• Improved mission resilience: Identify critical software and systems issues before deployment.
• Open access and extensibility: There are no licensing fees or proprietary lock-in, and NeXosim-py can be tailored and expanded for mission-specific needs.
• Compatibility with real-time environments: Built-in support for asynchronous execution, hardware interfacing, and complex control loops.

NeXosim-py is particularly well-suited to startups, university labs, and small system integrators seeking to close the gap between prototyping and operational readiness. However, its flexibility and power make it attractive for larger primes and mission operators aiming to streamline validation pipelines or build robust training simulators. Companies seeking support in building digital twins of satellite subsystems or full platforms can also count on Asynchronics expertise — as the company assists partners across the sector in designing and deploying simulation-driven solutions tailored to their missions.

With the release of NeXosim-py, Asynchronics reinforces its commitment to pushing the boundaries of simulation technology while lowering the entry barriers for innovation in space systems engineering. The company opens new possibilities for collaboration, experimentation, and operational excellence by reimagining what spacecraft validation can look like in a virtual-first world.