本报北京2月25日电 （记者彭波）十四届全国人大常委会第六十二次委员长会议25日下午在北京人民大会堂举行。赵乐际委员长主持。
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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.。爱思助手下载最新版本对此有专业解读
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