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ASIA PACIFIC SATELLITE INC
Striving for Space and Mankind

Space Technology

Standard On-Board Computer (SOBC) for low earth orbit/geostationary orbit satellites

On-Board Computer (OBC) is a central computer for satellite control consisting of high-performance processor, communication data analysis and creation module, satellite component control and monitoring module, etc

On-Board Computer (OBC) is a central computer for satellite control consisting of high-performance processor, communication data analysis and creation module, satellite component control and monitoring module, etc. 

OBC provides a hardware platform for operation of flight software (FSW) for satellite operation, controls the Payload and BUS. and collects and stores the status information to be transmitted to the ground station.


On-Board Computer (OBC) is a central computer for satellite control which provides a hardware platform for operation of flight software for satellite operation, controls the satellite, and collects and stores the status information data of the BUS and Ppayload to transmit to the ground station. 


Asia Pacific Satellite Inc. created a modulardesign by function for OBC and applied standardized communication interface to develop theStandard On-Board Computer (SOBC) which can reduce development period, cost, and risk through restructuring of function modules when being applied to new satellites.

SOBC of Asia Pacific Satellite Inc. is an optimal product that can be utilized in various space missions including low earth orbit satellites, geostationary satellites, deep space exploration satellites, landing modules, etc.

Highly reliable design based on high-performance LEON processor and radiation-tolerant FPGA
  • · Convergence of OBC functionsin LEO and GEO satellites
  • · Provides various standard communication interfaces
  • · Provides BUS and Payload control and monitoring port
  • · Provides software-based system recovery and reset function
  • · Provides TC/TM and special command processing function
  • · Application of modulardesign based on function blocks
  • · Application of compact/lightweight reduced design

Key Performance
  • · SOBC for Compact Advanced Satellite 500 1&2 (CAS500-1&2)
  • · SOBC for Korea Pathfinder Lunar Orbiter (KPLO)
  • · SOBC for Compact Advanced Satellite4&5 (CAS-4&5)
Key Specifications
  • · LEON2 (AT697F) processor
  • · CAN, MIL-STD-1553B, SpaceWire, DMA/UART, Channel-Link (Option) support
  • · BUS & Payload control & monitoring I/O provided
  • · Mass storage capacity: 128Gbits (Option)
  • · Mass: ≤ 13.5kg
  • · Dimension: 280mm x 267mm x 184mm