GPS卫星星座
GPS satellite constellation
LEO卫星星座
LEO satellite constellation networks
LEO卫星星座网络
LEO satellite constellation network
成像侦察卫星星座
imaging reconnaissance satellite constellation
方格星虫
Sipunculus nudus
Sipunculus nudus linnaeus
非固定连接卫星星座
unformed detachment satellite networks
格林恒星午时
Greenwich time of sidereal noon