来自欧洲的光学卫星的独特星座
2014年6月30日上午6:22的Spot 7推出，CET完成了在同一轨道上运行的四个光学航天器的星座。该星座进一步由双胞胎组成。
卫星图像
The theme for May 2016 is Satellite Imagery. We picked out 10 articles, with topics ranging from satellite radar interferometry to measuring spatial developments. Several Earth Observation satellite constellations are highlighted, including the SPOT family and the Sentinel programme. In addition, various exciting applications of satellite imagery – for example the support of polio eradication and tracking urban change and flood risk – are covered.
