Singapore: Singapore's first locally-built satellite, X-SAT, has travelled nearly 700 million kilometres, captured 8,000 photographs and has completed 4,400 successful commands while orbiting Earth. The satellite is being used for earth observation and imaging for environmental applications with a 10m resolution multispectral (three spectral bands in the visible and near infrared spectrum) instrument as a primary payload.
Above: The first Singapore Island satellite image captured by X-SAT. The image was captured on 11 May 2011 with a resolution of 12m. A multi-spectrum (red, green and near infra-red) camera is used. The white puffs are the clouds. The black puffs to the left of the clouds are their shadows. This photo is taken in the morning so the clouds’ shadows appear westward.
The X-SAT satellite marked three years in space on April 20. The 105kg micro-satellite, developed by Nanyang Technological University (NTU) and DSO National Laboratories, was launched into space on April 20, 2011, on a three-year mission.
In addition to X-SAT, NTU also has another satellite orbiting the Earth which was launched on November 21, 2013. Named the VELOX-PII, it is designed, built and tested by undergraduate students. This year, the university is set to launch another two student-built satellites, a 4.5kg nano-satellite named VELOX-I and a Picosat which will "piggyback" on the former and will separate from it after launch.