Our high performance processing unit utilises a 32-bit LEON3FT (IEEE-1754 SPARC v8) fault-tolerant processor with a speed of 50 MHz, making it one of the most capable on-board computers currently available on the market.
The SmallSat Sirius-TCM (Telemetry, Tracking and Command Control Module) LEON3FT has inherited advanced error detection and correction in its design. The real-time operating system runs on a LEON3FT fault-tolerant soft processor, compliant to IEEE 1754 SPARC v8, and fault tolerance is secured by using triple-modular redundancy on FPGA and memory scrubbing.
The Sirius-TCM LEON3FT 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 TCM receives and stores payload data and platform housekeeping data while at the same time distributing telecommands and serving mass memory data to the transceiver
Sirius spacecraft avionics are modular in design, modules can be combined to offer redundant configurations or to simply accommodate mission specific requirements.
The SmallSat Sirius-TCM comes with S-band and X-band transceiver interfaces and offers the ability to update software on orbit via telecommands.
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 and guarantee realtime-on-time operations. Designed and qualified for five years in LEO.
Adaptable
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 in orbit via telecommands. With pulse commands for low level, basic commanding. Sirius spacecraft avionics are modular in design, modules can be combined to offer redundant configurations or to simply accommodate mission specific requirements.
Why SIRIUS-TCM-LEON3FT?
| General | |
|---|---|
| Expected Life | 5 years in LEO |
| Processor | 32-bit LEON3FT (IEEE-1754 SPARC v8) fault-tolerant processor |
| Processor Clock | 50 MHz |
| SCET | 15.25 us accuracy |
| SDRAM | 64 MB (post-EDAC) |
| Instruction Cache | 8 kB |
| Data Cache | 8 kB |
| NVRAM | 16 kB (post-EDAC) |
| Operating Temperature Range | -30°C to +60°C |
| Nonvolatile System Memory Nand Flash | 2 GB (post-EDAC) |
| Mass Memory Storage | 32 GB (post-EDAC) |
| Power Supply Input | 4.5 V to 16 V |
| Interfaces | ||
|---|---|---|
| SpaceWire | 50Mbps | 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 SBand | RS422 level data stream and TRX command and housekeeping | 1 |
| CCSDC XBand | LVDS level data stream and both RS422 and LVDS level TRX command and housekeeping | 1 |
| CCSDS Umbilical | RS422 level data stream | 1 |
| Pulse Command Output | RS422 level CPDU pulse output | 12 |
| Size; Weight & Power | |
|---|---|
| Nominal Power Consumption | 1.3 W |
| Mass | 130 g |
| Length | 95.89 mm |
| Width | 90.17 mm |
| Height | 17.20 mm |
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