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October 4th, 2011
SSTL Redefines the Cost of Radar Imaging with NovaSAR-S

The 400-kg NovaSAR-S design combines SSTL’s flight-proven SSTL-300 platform with an innovative S-band SAR payload, developed in collaboration with Astrium Ltd, who will be responsible for supplying the payloads. The challenge has been accommodating the power and processing requirements within a small, low-cost satellite platform. NovaSAR-S’s 3m x 1m phased array antenna was developed by space-borne SAR specialists at Astrium Ltd, and has now been successfully trialled using an airborne demonstrator. The SSTL-300 platform hosting the payload is an adaption of SSTL’s very-high-resolution imaging NigeriaSat-2 mission, which was launched in August.

“Based on highly efficient S-band solid state amplifier technology, NovaSAR-S has been designed to provide detailed imaging performance for a variety of orbits,” said Luis Gomes of SSTL. “It offers space-based radar capability to customers who might not have considered it possible – all for the equivalent cost of a traditional low cost optical Earth observation mission.”

NovaSAR-S acquires medium resolution radar imagery of 6-30 m ground sample distance, depending on the viewing mode being employed. Its four viewing modes are optimised for a wide range of applications, including flood monitoring, agricultural crop assessment, forest monitoring, land cover classification, disaster management and maritime applications – notably ship tracking and oil spill detection.

Radar images reveal surface textures instead of reflected light. A radar satellite illuminates its target with a microwave beam then records the signal bouncing back. In addition, the satellite takes advantage of its rapid motion relative to Earth’s surface to build up an image with sharpened resolution equivalent to that of a much larger ‘synthetic aperture’ antenna.

Intended for equatorial or polar low-Earth orbits, NovaSAR-S offers high data throughput of at least one million square km per day, observing in a variety of polarisation combinations to add ‘colour’ and detail to acquisitions.

The system is designed to function either independently, or as part of a constellation. A trio of NovaSAR-S satellites could image any point on the globe every day, regardless of local weather or time of day.

SSTL’s unique approach to engineering and project management means it can deliver a complete NovaSAR-S mission into orbit within 24 months. The platform has been specifically sized to facilitate low-cost launch opportunities. SSTL can also offer support on ground segment architecture, data processing and archiving and knowledge transfer, based on customer needs.

About SSTL

Surrey Satellite Technology Limited (SSTL) is the world’s leading small satellite company, delivering operational space missions for a range of applications including Earth observation, science and communications. The Company designs, manufactures and operates high performance satellites and ground systems for a fraction of the price normally associated with space missions, with over 400 staff working on turnkey satellite platforms, space-proven satellite subsystems and optical instruments.

Since 1981 SSTL has built and launched 36 satellites, as well as providing training and development programmes, consultancy services and mission studies for ESA, NASA , international governments and commercial customers, through an innovative approach that is changing the economics of space.

Based in Guildford, UK, SSTL is owned by EADS Astrium NV.

www.sstl.co.uk