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导航星全球定位系统中的布洛克-2样星的系统关键设计审定工作已经完成。它大约比目前现有的导航星大三分之一,以提高工作能力和适应可能增长的要求。布洛克-2导航星的设计改进如下:①设有较宽大的太阳帆板,可增加功率容量;②安装了环形超高频天线,以传输核爆炸探测数据;③可以选择适合的导航信号;④提高了生存能力和抗核辐射能力;⑤可用航天飞机发射。这种建立在空间的无线电导航系统正处在全尺寸样星研制阶段,布洛克-2的首次发射预计在1986年初进行。
The validation of the key system design for the Block-2 sample satellite in the navigation satellite Global Positioning System has been completed. It is approximately one-third larger than currently existing navigation spheres to enhance the ability to work and adapt to the potential for growth. Bullock-2 navigation star design improvements are as follows: ① has a larger solar panels to increase power capacity; ② installed a circular UHF antenna to transmit nuclear explosion detection data; ③ can choose the appropriate navigation signal; ④ improve the viability and anti-nuclear radiation capabilities; ⑤ available space shuttle launch. This space-based radionavigation system is in full-scale prototype development stage, the first launch of Block-2 is expected to be carried out in early 1986.