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Satellite data sources could improve intelligence
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遇见意想不到的文明，埃塞传奇 | www wenxuecity com
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Satellite uses SAR imagery to capture world s sharpest images
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Capella Space s Capella-2 satellite is capable of 50cm x 50cm resolution imaging with its Spotlight mode
This allows for long exposures up to 60 seconds over an area which results in ‘crystal clear’ imagery
Unlike other commercial satellites, Capella-2 can see through dense clouds and operate at night
This technology is called Synthetic Aperture Radar, which has been used by NASA since the 1970s
It shoots powerful radio signals at a point of interest to illuminate a target on the ground
Echos from each pulse are then collected and interpreted to create the detailed images
Because the satellite sends its own signal down instead of collecting light it can penetrate walls