June 21, 2023

Spacecraft bus


SWOT spacecraft bus

The SWOT spacecraft bus provides electrical power to the satellite, controls its attitude, handles payload data and sends them to ground via an X-band link, and performs thermal control functions. Its thrusters control the satellite’s orbit and re-entry at the end of its life. 

Particular attention has been paid to micro-vibrations so as not to affect interferometric measurements.

The avionics draw on the heritage of a generic product line developed by Thales Alenia Space and optimized through CNES’s ISIS product line for satellite command/control.

A high-performance 4-Tbit mass memory enables high-speed acquisition and storage of data from KaRIn for transmission via the X-band telemetry link.

A 30-m2 solar array provides power to the satellite in all solar illumination conditions, compensating for orbital drift.