This command and data handling solution was designed for advanced satellite missions operating in low earth orbit (LEO). The readily available SmallSat Sirius TCM Development Kit with LEON3FT delivers ‘always-on’ reliable operations that work every-time-on-time with precision performance.
The solution includes mass memory and telemetry/telecommand functionality, with a focus on high reliability, resiliency and performance. The TCM receives and stores payload data and platform house keeping data while at the same time distributing telecommands and serving mass memory data to the transceiver. Fault tolerance is secured through triple-modular redundancy on FPGA and memory scrubbing.
Sirius spacecraft avionics are modular in design. Modules can be combined to offer redundant configurations, or to simply accommodate mission specific requirements. The Sirius Command and Data Handling system has a standard single string system that consists of an on-board computer (Sirius OBC) and a combined mass memory with CCSDS stack (Sirius TCM). The Sirius TCM is supplied with user-friendly application software for the management of onboard services, facilitating out of the box integration. Our Sirius TCM Development Kit offers dsub/microD connectors in the mechanical structure, which makes it easy to work with and simplifies the connector usage.
Performance
With 50 MHz LEON3FT soft processor, RTEMS real-time operating system (RTOS) and 32 GB mass storage capacity delivering high-performance computing. Utilizing SpaceWire onboard the main data bus for high bandwidth and on-board data transfer. The transceiver interface uses CCSDS encoding standards for satellite link services, compatible with leading ground station networks.
Reliability
Sirius TCM solutions have autonomous single event latch-up protection in logic and data storage. Our inbuilt protections are based on over a decade of design heritage guarantee realtime-on-time operations. Designed and qualified for five years in LEO. The development kit is powered through a mains 12V adaptor, eliminating the need for specialised power supplies or other laboratory equipment.
Adaptability
Easy-to-use interfaces, facilitating the development phase and reducing overall development and project costs. Designed for the most demanding missions, the Sirius TCM comes with S-band and X-band transceiver interfaces and offers the ability to update software on orbit via telecommands. With pulse commands for low level, basic commanding.
Why Sirius TCM Development Kit?
| General | |
|---|---|
| Design Life | 5 years in LEO |
| Connectors | Dsub/microD |
| Processor | 32-bit LEON3FT (IEEE-1754 SPARC v8) fault-tolerant processor |
| Processor Clock | 50 MHz |
| SCET | 15.25 μs accuracy |
| SDRAM | 64 MB (post-EDAC) |
| Instruction Cache | 8 kB |
| Data Cache | 8 kB |
| NVRAM | 16 kB (post-EDAC) |
| Operating Temperature | Room temperature |
| Nonvolatile System Memory Nand Flash | 2 GB (post-EDAC) |
| Mass Memory Storage | 32 GB (post-EDAC) |
| Power Supply | Input 9V to 15V using power supply; 12V wall socket plug included |
| Interfaces | ||
|---|---|---|
| SpaceWire | 50 Mbps; RMAP support | 2 |
| Serial Ports | RS422 / RS485 UARTs | 3 |
| Serial Ports | RS485-only UARTs | 2 |
| PSS Interface | RS485 PPS input | 1 |
| GPIO | 3.3 V logic | 12 |
| CCSDS TRX Interface S-band | RS422 level data stream and TRX command and housekeeping | 1 |
| CCSDS TRX Interface X-band | LVDS level data stream and both RS422 and LVDS level TRX command and housekeeping | 1 |
| CCSDS TRX Umbilical Interface | RS422 level data stream | 1 |
| Pulse Command Output | RS422 level CPDU pulse output | 12 |
| Debugging | JTAG port for CPU OpenOCD (real-time debug interface) with debug UART | 1 |
| Dimensions | |
|---|---|
| Length | 230 mm |
| Width | 155 mm |
| Height | 37 mm |
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