Sirius TCM

The Sirius TCM is a mass memory module that incorporates telemetry and telecommand functionality and is designed with focus on high reliability, resiliency and performance. It is developed to support the mission assurance requirements for a range of advanced nanosatellite and microsatellite missions, operating from low earth orbit to deep space. Fault tolerance is secured through triple-modular redundancy on FPGA and memory scrubbing.

Main features

• Reliable high-performance space data handling avionics
• Tolerant to Single-Event-Effects (SEE) in logic and data storage
• RTEMS real-time operating system (RTOS) running on a 50 MHz soft processor
• SpaceWire on-board data bus
• S- and X-band transceiver interfaces
• 16 GB mass storage capacity
• CCSDS satellite link services
• Designed and qualified for five years in LEO
• ITAR free equipment
• Modular, nanosatellite compatible, mechanical design
• Pulse commands for low level, basic commanding

Modular design

The Sirius products are designed for modularity. A standard single string system consists of an on-board computer (Sirius OBC) and a combined mass memory unit (Sirius TCM). The OBC runs mission specific software and manages the spacecraft system. The TCM receives and stores payload data and platform housekeeping data while at the same time it distributes telecommands and serves mass memory data to the transceiver. A Sirius data handling system is easily adapted for additional capacity and redundancy by
adding modules.

Interface management

The Sirius TCM implements SpaceWire for the main onboard data bus for high bandwidth on-board data transfer. The transceiver interface of the unit implements the CCSDS encoding standards for satellite link services for
compatibility with leading ground station networks. The Sirius TCM is supplied with a user-friendly application software for management of on-board services which makes it ready for integration out of the box or with a board support package for custom software development.

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Flight heritage

We are very proud of our flight heritage since we flew our avionics on the first mission back in 2009. Many successful flights have followed since then and many new are scheduled.