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      "statement": "# Chen Fangyun: a two-satellite positioning and communication concept\n\nProposed regional positioning using two geostationary satellites together with communication, a concept developed by a team and demonstrated in 1989.\n\n## Scientific scope\n\nThis is the 1983 concept attributed by the Chinese Academy of Sciences to Chen. Team engineering, the 1989 demonstration and the later BeiDou system are distinct stages.\n\n## Reading status\n\nThis is a source-linked WRS catalogue note. A full explanatory guide and independent scientific reconstruction have not been completed for this entry. Read the identified original work for its complete narrative and arguments.\n\n## People and systems\n\nChen Fangyun\n\nThe named authors contributed to this scoped work; individual effort shares and later applications are not assigned by the byline.\n\n\n\n## Original sources\n\n- [Chinese Academy of Sciences: Chen Fangyun and two-satellite positioning](https://www.cas.cn/xzfc/202211/t20221107_4854043.shtml)\n",
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