Wonderfall (@w0nderfall)
One reason for routinely launching GPS satellites is simply "constellation replenishment," said Col. Andrew Menschner, deputy commander of the Space Force's Space Systems Command. Old satellites degrade and die, and new ones need to go up and replace them. At least 24 GPS satellites are needed for global coverage, and having additional satellites in the fleet can improve navigation precision. Today, there are 31 GPS satellites in operational service, flying more than 12,000 miles (20,000 kilometers) above the Earth.
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刘年丰：我们的最终定位是软硬一体的公司，我们也认为具身智能在“脑”不在“型”。可以参考苹果，最核心的竞争力不是摄像头、不是主板，而是操作系统和生态。这条路虽然难，但也是我们想走的路。
Tony Jolliffe BBC
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Nasa to put nuclear reactor on the Moon by 2030 - US media
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