Intra‐satellite networking

Aerospace remote‐sensing payloads are continuing to advance to higher speeds and increasing the demands of on‐board intra‐satellite networks. These payloads include synchronous continuous mode and asynchronous event‐driven sensor data requiring real‐time transfer with deterministic latency to capture sensor data. The networked satellite payloads include combinations of: uplinks, downlinks, sensors, processors, formatters, storage devices (recorders), and payload controller. Advanced systems planned for development in the next few years require data rates of 1–10 Gbps. An effective aerospace data‐handling network must supply real‐time data that is fault tolerant and able to withstand the rigorous conditions of launch as well as the harsh space environment. The IEEE1393‐1999 Standard for spaceborne fibre‐optic data bus (SFODB) has established the design requirements for the interconnection of these on‐board aerospace subsystems. Programs involving NASA Goddard Space Flight Center, the Air Force Research Laboratories, Space Photonics Incorporated, the University of Arkansas, and others, are in the process of developing components necessary for the implementation of the SFODB. SFODB utilizes fibre‐optic components for subsystem interconnect and eliminates cable‐to‐cable and box‐to‐box EMI, significant reductions in size, weight, and power are among the achievable characteristics that are desirable for aerospace applications. This paper discusses SFODB characteristics and the status of implementation programs. Copyright © 2006 John Wiley & Sons, Ltd.