The Airbus DS NL ESPRiT TM/TC Front End is a telemetry and telecommand processor which encodes TC packets to CLTUs and decodes CADUs to TM packets. Euclid, MetOp-SG, and Neosat have been using the ESPRiT TM/TC Front End system.
The system is used during satellite Assembly, Integration and Testing (AIT), verification, and pre-launch operations as it acts as a front-end in connecting for the Central Checkout System (CCS) or test supervisor software to the spacecraft via TCP/IP sockets.
Detailed health and status information for all electrical links and the components of the front-end are displayed in the Local GUI which offers full control functionality, enabling the system to be used without a CCS.
The TC packets are encoded into CLTUs and CADUs are decoded into TM packets. The system also features optically-isolated interfaces with two functionalities, connect and disconnect, to provide safety during connection to the flight hardware.
The system consists of an industrial PC with two hard drives in RAID-1 configuration running a Red Hat Enterprise Linux operating system.
- Data processing is done in a reconfigurable FPGA
- RS-422 and TTL I/O
- Data, Clock, NRZ-L, and Biphase encoding/decoding
- Optically-isolated I/O with connect/disconnect and overvoltage protection
- Internal and external loopback for self-test
- Automatic TM bit rate detection
Local GUI features
- Real-time monitoring of TM and TC packets with overview of TM virtual channel activity including CLCW
- Logging of TC and TM to disk, for offline analysis
- CCSDS encoding/decoding process
- Scripting and command line interface for full control
- Modern scripting language, or directly from console
Customization of the system is possible.
Scalable to higher bandwidth and more parallel streams.
The system has achieved flight heritage.
Euclid, MetOp-SG and Neosat has been using the ESPRiT TM/TC Front End system.
Testing & qualification
Compliant with ECSS-E-ST-50 and CCSDS.
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Last updated: 2021-09-22