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[综合报道] 美国陆地卫星迄今已发射三颗。现在仍然在工作的还有两颗。预计到1981年将要发射一颗更先进的工作型卫星—陆地卫星-D。关于陆地卫星地面接收站的情况,在美国本土上设有三个站,另外加拿大、意大利、巴西、伊朗、印度、日本、瑞典和澳大利亚等十多个国家也已与美国达成建站协议。这些接收站的覆盖范围和开始接收卫星数据的时间等详细情况,请见附图和附表。
[Comprehensive Report] The U.S. terrestrial satellite has so far launched three. There are still two at work. It is estimated that a much more advanced working satellite, Landsat-D, will be launched by 1981. As for the terrestrial satellite receiving station, there are three stations in the United States. In addition, more than 10 countries, including Canada, Italy, Brazil, Iran, India, Japan, Sweden and Australia, have reached agreement on establishing a station with the United States. For details of the coverage of these receiving stations and the time of starting receiving satellite data, see the attached drawings and schedules.