uplink

Overview ¶

Example: Telecommands from a ground station to a spacecraft

This example demonstrates a complete CCSDS telecommand (TC) uplink chain:

Ground Station Side:
  1. Create telecommand Space Packets (SPP)
  2. Frame packets into TC Transfer Frames (TCDL) via MAP Packet Service
  3. Manage reliable delivery with FOP-1 sliding window (COP-1)
  4. Wrap frames as CLTUs with BCH(63,56) error coding (TCSC)
  5. Transmit CLTUs over a simulated RF uplink

Spacecraft Side:
  1. Receive CLTUs from the RF uplink
  2. Unwrap CLTUs: BCH decode with single-bit error correction
  3. Decode TC Transfer Frames and verify CRC
  4. Validate frame sequence with FARM-1 (COP-1)
  5. Extract telecommand Space Packets from accepted frames
  6. Send CLCW status back to ground via the TM return link

The ground station sends commands on two virtual channels:

• VC0: Critical operations (mode change, safe mode), Type-A reliable delivery
• VC1: Routine housekeeping requests, Type-A reliable delivery

Run with: go run ./examples/uplink/