HOTSAT-1: Launched 2023

Built by Surrey Satellite Technology Limited (SSTL) for UK company Satellite Vu, HOTSAT-1 boasts a ground-breaking 3.5m resolution mid-wave infrared imager with astonishing video capability, all while maintaining a sensitivity of less than 2 degrees Celsius. This unparalleled satellite video generation capability enables the detection of highly dynamic features and the creation of 3D profiles, facilitating a multitude of applications. From mitigating the effects of heat islands in urban centres to monitoring industrial processes, waterway pollution, ensuring energy efficiency, and assessing the health of solar farms, HOTSAT-1 is set to transform industries across the globe.


We supplied the small geostationary satellite platform for the first “EUTELSAT QUANTUM” class telecommunications spacecraft.  We were under contract to prime contractor, Airbus Defence and Space, who supplied the flexible payload for the spacecraft.  

EUTELSAT QUANTUM is SSTL's first geostationary satellite platform and the new spacecraft design will represent a first in the commercial satellite industry, by enabling the complete electronic synthesis of “receive” and “transmit” coverages in the Ku-band. 

ELSA-d Client: Launched 2021

SSTL supplied the Client satellite and avionics for ASTROSCALE's inaugral ELSA-d mission, which will simulate capture of orbital debris and is designed to validate key technologies for end-of-life spacecraft retrieval and disposal services.  

The ELSA-d mission comprises of a "Servicer" satellite and a Client (target) satellite, and will demonstrate key technologies necessary for orbital debris removal such as rendezvous and docking and proximity operations.  ASTROSCALE are designing and manufacturing the Servicer satellite in Tokyo using avionics from SSTL.  

Click here to watch ASTROSCALE's ELSA-d mission animation.

Galileo Navigation Payloads: 2010-2020

Between 2010 and 2020 SSTL manufactured and delivered 34 navigation payloads for the deployment phase of Galileo, Europe's satellite navigation system. 

OHB System AG was the prime contractor and builder of the spacecraft platform and SSTL had full responsibility for the navigation payloads, the brains of Galileo's navigation system.