The EU's global navigation satellite system, built for European autonomy from US GPS, now the world's most accurate civilian GNSS and a pillar of European strategic independence.
China's state-owned global satellite navigation system, now embedded in over 2 billion devices and challenging US GPS dominance in positioning, timing, and strategic influence.
完整档案 ›Four global satellite constellations compete to position phones, ships, and weapons, while jamming and spoofing have made signal integrity a front-line security question.
欧盟启动伽利略第二代发射；中国将北斗整合至 37 颗卫星，谋求全球采用