SSTL's Kepler Building in Guldford, Surrey. The 3,700sqm (40,000 sqft) facility provides world class test halls providing two 125 cubic metre walk-in thermal chambers, a seismic test platform, 15,000kg and 3,200kg monorail cranes, 10,000kg and 8,000kg gantry cranes and reinforced floors. The Kepler Building includes a dedicated secure area for the building of Galileo navigation payloads.