级联分样与分频段功率谱计算的大地电磁张量阻抗估算对比
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张刚, 庹先国, 王绪本, 李怀良
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A comparison of magnetotelluric impedance estimation effects with cascade and sub-band frequency spectrum calculation methods
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Gang ZHANG, Xian-Guo TUO, Xu-Ben WANG, Huai-Liang LI
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| 表2 两种功率谱估计方法所计算的实测数据不同频段的叠加次数 |
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| 分样级数 | 级联分样 | 多频段 | | 采样率/Hz | 最小周期/s | 最大周期/s | 叠加次数 | 采样率/Hz | 最小周期/s | 最大周期/s | 叠加次数 | | 1 | 0.25 | 12.8 | 21.3333 | 6220 | 1 | 12.8 | 51.2 | 3902 | | 2 | 0.125 | 25.6 | 42.6667 | 3110 | 1 | 42.6667 | 409.6 | 485 | | 3 | 0.0625 | 51.2 | 85.3333 | 1553 | 1 | 170.667 | 819.2 | 241 | | 4 | 0.03125 | 102.4 | 170.667 | 776 | 1 | 682.667 | 1638.4 | 120 | | 5 | 0.015625 | 204.8 | 341.333 | 388 | 1 | 1365.33 | 10922.7 | 17 | | 6 | 0.0078125 | 409.6 | 682.667 | 194 | | | | | | 7 | 0.00390625 | 819.2 | 1365.33 | 95 | | | | | | 8 | 0.001953125 | 1638.4 | 2730.67 | 47 | | | | | | 9 | 0.0009765625 | 3276.8 | 5461.33 | 23 | | | | | | 10 | 0.00048828125 | 6553.6 | 10922.7 | 10 | | | | |
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