USE CASE
In order to validate the full De-RISC architecture, a modular application representative of aerospace workload will be developed and integrated. The TM/TC (telemetry and telecommand) application offers the opportunity of a large range of processing characteristics, exercising the processor and the software environment in a complete way.
Coupled with the communication sub-system of a satellite, the TM/TC system deals with the reception and interpretation of commands from ground, and sends back critical information about the satellite (attitude, status, health monitoring, etc.) and payload information (e.g. images or radar data). In the context of the Stratobus project by Thales Alenia Space, a High-Altitude Platform System in the form of a stratospheric balloon, such an application would face both space and aviation requirements. Typical components in a TM/TC application include:
– Packet-based datalink, requiring low-latency processing for critical telemetry.
– Decryption of telecommands and encryption of telemetry, to protect against unauthorized control of the satellite.
– Image compression and/or lossless data compression.
This allows the assessment of both time-critical and cybersecurity aspects of the platform, as well as overall performance and data throughput. The test application will be configurable, e.g. in data size, to focus on each of those aspects. The low-level communication protocol will not be included for practical reasons. In addition, synthetic benchmarks and stress applications will be used to assess the sensitivity of the platform to timing interference.
Figure: ground/satellite/High Altitude Pseudo-Satellites communication