输入纬度，经度，时区等资料，点确定以刷新星图。

Enter the latitude, longitude, and time zone information, then click the OK button to redraw the map for the new position.

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推导了无线电波传输路径上各点经纬度及高度坐标等参数，并在此基础上进行了波束覆盖区功率密度的估算。

On the basis of the previous work, the authors make an estimation about power density within the beam covered area.

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