Satellite Onboard Computers and Data Handling: The Decisions Inside the Spacecraft

Sun, 17 May 2026 00:00:00 +0000

A satellite does not become useful simply because it carries a capable sensor, a strong radio, a good battery, and a precise pointing system. Those parts need a place where commands are interpreted, measurements are organized, faults are noticed, time is kept, data is stored, and the spacecraft’s next action is chosen. That place is the onboard computer and the command and data handling system around it.

The subject can sound less dramatic than solar arrays or rocket fairings, but it sits at the center of the mission. The onboard computer is where the spacecraft’s design becomes behavior. It decides which command is valid, which payload activity starts next, which packet gets stored, which telemetry is sent first, which heater should be switched on, which fault response should run, and which ordinary-looking number deserves attention before it becomes trouble.

Spacecraft Software Verification and Configuration Control: Trusting Code in Orbit

Wed, 27 May 2026 00:00:00 +0000

Spacecraft software is easy to underestimate because it rarely appears in the mission poster. The satellite may be described by its payload, orbit, antenna, solar arrays, or launch vehicle. Yet the mission’s behavior passes through code. Commands are checked by software. Telemetry is organized by software. Payload activities are scheduled by software. Fault responses are triggered by software. Updates, timers, memory, logs, modes, and autonomy all depend on software that has to behave far from the people who wrote it.

Flight Software on Fondsites

Satellite Onboard Computers and Data Handling: The Decisions Inside the Spacecraft

Spacecraft Software Verification and Configuration Control: Trusting Code in Orbit