On-board Data Handling

Abstract

This chapter describes the operations of the spacecraft components that handle the distribution and processing of on-board data. This subsystem is referred to as on-board data handling (OBDH). Modern spacecraft are built around a powerful processing module that uses software to perform many functions. Complex data structures that need to be handled are defined to communicate with the ground stations, but also to handle on-board components. Using classic communications satellites and scientific satellites in low Earth orbit as examples, we present the basic components of OBDH in more detail, including typical operational tasks and considerations.