SSTL-300

SSTL-300
Name	SSTL-300
Manufacturer	Surrey Satellite Technology Limited
Country	United Kingdom
Mass	300 kg
Power	600 W (typical)
Dimensions	1.2 m × 1.0 m × 1.0 m (stowed)
Propulsion	optional bipropellant / electric
Orbit	LEO / SSO / MEO
Status	operational

SSTL-300 The SSTL-300 is a small satellite platform developed for Earth observation, communications, and scientific missions. Designed by Surrey Satellite Technology Limited, it targets customers seeking medium-class payload capacity with flexible bus options for low Earth orbit and sun-synchronous orbit missions.

Overview

The SSTL-300 project links traditions from Surrey Satellite Technology Limited with industry trends exemplified by SpaceX, Rocket Lab, Arianespace, Blue Origin, and Roscosmos. It responds to market demands demonstrated by programs such as Copernicus Programme, Landsat, Sentinel-2, Planet Labs constellations, and Iridium NEXT. The platform integrates lessons from missions like STRaND-1, TechDemoSat-1, DMC-3 and benefits from partnerships with organizations including European Space Agency, UK Space Agency, NASA, JAXA, and ISRO.

Design and Specifications

SSTL-300's structural and systems heritage draws on platforms used in projects by Airbus Defence and Space, Thales Alenia Space, Lockheed Martin, Northrop Grumman, and Mitsubishi Electric. The bus uses aluminum honeycomb and composite panels similar to designs from OHB System, MDA Space, Ball Aerospace, and Sierra Nevada Corporation. Avionics employ processors and architectures validated on missions by Rheinmetall, Honeywell Aerospace, Boeing, and General Dynamics. Thermal control, power systems, and attitude determination take cues from subsystems used on satellites by Maxar Technologies, Garmin, Hitachi, and NEC Corporation. Propulsion options include electric thrusters like those developed by Safran, IHI Corporation, Ad Astra Rocket Company, and chemical systems from Aerojet Rocketdyne. Communications architectures reflect practices from SES S.A., Inmarsat, Eutelsat, and Telesat.

Payload and Capabilities

The SSTL-300 supports optical imagers, synthetic aperture radar, and radio payloads comparable to sensors used by Airbus Defence and Space’s optical programs, Capella Space’s SAR systems, and Hawkeye 360’s RF payloads. Its payload interfaces accommodate detectors and cameras like those produced by Teledyne Technologies, Sony Corporation, Canon Inc., and Thales Alenia Space imaging lines. Onboard processing options draw on algorithms and hardware seen in experiments from MIT, Caltech, University College London, Imperial College London, and NASA JPL. Data downlink and encryption standards follow protocols used by European Organisation for the Exploitation of Meteorological Satellites, NATO, GCHQ, and UK Ministry of Defence contractors.

Launch and Operational History

Launch options for SSTL-300 include vehicles from Arianespace (Vega), SpaceX (Falcon 9), Rocket Lab (Electron), Blue Origin (New Shepard/New Glenn prospects), and national launchers such as ISRO’s PSLV and Roscosmos’s Soyuz. Operational campaigns leverage ground segment models from KSAT, SSTL GroundStation Network, ESA Ground Station Network, and commercial providers like Amazon Web Services and Microsoft Azure for data distribution. Missions build on operational experience from constellations like PlanetScope, RapidEye, DMC International Imaging, and Spire Global.

Applications and Customers

Target markets include civil agencies and commercial companies akin to European Commission programs, United Nations agencies for disaster response, World Bank projects for development monitoring, and private-sector clients in agriculture, maritime, and telecommunications such as Bunge Limited, Maersk, ExxonMobil, and Vodafone. Scientific and academic users mirror collaborators like University of Oxford, Stanford University, University of Cambridge, Columbia University, and research institutions including National Oceanic and Atmospheric Administration and Natural Environment Research Council.

Development and Manufacturing

Development draws on supply chains and industrial practices associated with Rolls-Royce plc precision engineering, BAE Systems systems integration, GKN Aerospace composites, and Renishaw metrology. Manufacturing and testing regimes adapt standards from International Organization for Standardization and qualification approaches used by contractors serving European Space Agency and NASA. Satellite assembly, integration and testing leverage facilities similar to those of Surrey Satellite Technology Limited and partners in the UK Space Cluster and the European Space Industry.

Regulatory and Safety Considerations

Regulatory compliance addresses frequency allocation and licensing processes overseen by International Telecommunication Union and national regulators like Ofcom, Federal Communications Commission (United States), and European national authorities. Space safety, debris mitigation, and reentry policies align with guidelines from Inter-Agency Space Debris Coordination Committee, United Nations Office for Outer Space Affairs, and treaty frameworks such as the Outer Space Treaty and principles followed by European Space Agency programs. Insurance and export controls follow regimes influenced by Export Administration Regulations, UK Strategic Export Licensing, and procurement policies used by agencies like DEFRA and MOD.

Category:Satellites