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中文摘要：
介绍一种利用GPS阵列高频观测数据提取地震面波信息的波束聚焦法。通过在GPS坐标序列的垂直分量中加入模拟的瑞利波信号，得到GPS阵列观测站模拟地震波记录，分析了波束聚焦法在不同信噪比下提取地震波信号的能力。结果表明，当信噪比为1．5时，不能获得正确的慢度估值；当信噪比为3时，提取的慢度估值接近理论值。
英文摘要：
A method of beam forming for processing high-rate GPS data and extracting seismic wave information is introduced. Simulated seismic waves of each GPS station are synthesized by adding simulated Rayleigh waves into vertical component of GPS coordinates series. The capacity of beam forming to extract seismic wave information of different SNR （ signal to noise ratio） is analyzed. The results indicate that, the correct value of slowness cannot be obtained when the SNR is 1.5, while it is close to the theoretical value when the SNR ratio is 3.
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