As an input to formulation of weather forecasts , aviation forecasters use outputs from the numerical weather prediction models of the european centre for medium range weather forecasts and the united kingdom meteorological office received in the form of grid point values via the global telecommunication system 欧洲中期天气预报中心及英国气象局经全球电信系统向外发放数值天气预报模式的网格点数据。航空预报员使用这些资料，作为制定天气预报的一项依据。
On feb15th , 1997 , the 69 countries and regions , which amounted to 90 percent above of the global telecommunication market , signed “ basic telecommunication agreement ” under wto . and this marked the coming of global competition age of the telecommunication industry . therefore , it is a very important topic in reality to study the telecommunication universal service mechanism under the open competition environment 1997年2月15日,占全球电信市场90 %以上的69个国家和地区签订了wto 《基础电信协议》 ( 《 basictelecommunicationagreement 》 ) ,这标志着电信业全球竞争时代的到来,研究开放竞争环境下的电信普遍服务机制就成为一个有着重要现实意义的课题。
