The combinational evaluation method which combines TOPSIS with gray correlation degree analysis can improve validity of the evaluation result.
以理想解法和灰色关联度分析法为基础进行组合，得到的组合评价方法能够提高评价结果的有效性。
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This paper presents and realizes an ionospheric disturbance observation mode by using combinational pulses control and echo's phase measurement analysis in ionospheric vertical sounding.