Minimum performance objectives for narrow-band digital channels using geostationary satellites to serve transportable and vehicular mobile earth stations in the 1-3 GHz range, not forming part of the ISDN
使用地球静止卫星服务于1-3 GHz范围内(不构成ISDN的一部分)可移动和车载移动地球站的窄带数字信道的最低性能目标