As a recent report from the National Academy of Sciences highlights, these satellites hold tremendous potential for making satellite-based science more accessible than ever before.
2019年6月六级真题（第三套）阅读 Section B
As an organization of volunteers, AMSAT was putting "amateur" satellites in orbit decades before the current Cube Sat craze.
2019年6月六级真题（第三套）阅读 Section B
But over the past few decades a unique class of satellites has been created that fits the bill: CubeSats.
2019年6月六级真题（第三套）阅读 Section B
However, they're more cautious about sharing information with nonmembers, as the organization guards against others developing the ability to hiJack and take control of their satellites.
2019年6月六级真题（第三套）阅读 Section B
Just like drones before them, miniature satellites are beginning to fundamentally transform our conceptions of who gets to do what up above our heads.
2019年6月六级真题（第三套）阅读 Section B
Officials at the White House announced a new space policy focused on managing the increasing number of satellites that companies and governments are launching into space.
2019年6月六级真题（第二套）阅读 Section C
One impetus for the policy is that companies are already starting to build massive constellations, comprising hundreds or thousands of satellites with many moving parts among them.
2019年6月六级真题（第二套）阅读 Section C
Satellites used to be the exclusive playthings of rich governments and wealthy corporations.
2019年6月六级真题（第三套）阅读 Section B
Space, especially the space directly around our planet, is getting more crowded as more governments and companies launch satellites.
2019年6月六级真题（第二套）阅读 Section C
The department will make sure that newly launched satellites don't use radio frequencies that would interfere with existing satellites, and schedule when such new satellites can be launched.
2019年6月六级真题（第二套）阅读 Section C
Two or more satellites slamming into each other could create many more out-of-control bits that would pose even more hazards to the growing collection of satellites in space.
2019年6月六级真题（第二套）阅读 Section C
within their compact bodies these minute satellites are able to house sensors and communications receivers/ transmitters that enable operators to study Earth from space, as well as space around Earth.
2019年6月六级真题（第三套）阅读 Section B
Yet as LEO opens up to more amateur satellites, they may pose an increasing threat.
2019年6月六级真题（第三套）阅读 Section B