Placed in a geostationary orbit 36,000 kilometres above Earth, the GO-3S satellite will consist of a platform carrying a very large telescope, with a 4.2-metre diameter aperture. This is even larger than the Herschel telescope (3.5 metres in diameter) built by Astrium for the European Space Agency and which is now operating in orbit. Each GO-3S satellite would potentially be able to access one quarter of the planet for daytime observation and would be capable in just a few minutes of directing its 100km x 100km field of observation to a target zone and then switching to another zone just as quickly. It would then transmit images and video to the ground in real time.
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