据《日本科学与技术》杂志报导,日本邮政省已经完成了关于建立所谓“平流层无线电中继系统”的最后研究报告。这个中继系统实际上就是在地球上空20公里处的平流层中飞行的一架载有通信设施的无人驾驶飞机。常规的通信设施一般不是设在地面上就是设在卫星上。平流层无线电中继系统的设置地点可以说是介于两者之间,因而兼具两者的优点,它比地面通信站的复盖面更广,而比 According to Japan Science and Technology magazine, Japan’s Ministry of Post has completed its final report on the establishment of a so-called “stratospheric radio relay system.” This relay system is actually a telecommunications-equipped drones flying in the stratosphere 20 kilometers above Earth. Conventional communications facilities are generally not located on the ground or on satellites. Stratospheric radio relay system can be said to be located between the two places, which combines the advantages of both, it covers more than the ground communication station, while the ratio