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EH-4系统的数据处理仍依赖于DOS界面下的数据采集和处理软件IMAGEM,不仅使用不便,而且有效频点少、频率分布不均匀、抗干扰能力差。本文在剖析EH-4系统数据处理流程的基础上,正确地读取了EH-4系统原始时间序列文件,引入Hilbert-huang变换分析时间序列,压制噪音,然后采用周期图方法重新计算了自功率谱、互功率谱和张量阻抗分量,以及由阻抗定义的视电阻率,重构阻抗文件的频点数约是原始阻抗文件的6倍,极大地增加了纵向数据密度,提高了分辨率和解释可靠性。实例应用表明了方法的正确、有效和可靠,具有推广价值。
EH-4 system data processing is still dependent on the DOS interface data acquisition and processing software IMAGEM, not only inconvenience, and less effective frequency, uneven frequency distribution, anti-interference ability. Based on the analysis of the data processing flow of EH-4 system, this paper correctly reads the original time series files of EH-4 system, introduces Hilbert-huang transform to analyze the time series, suppress the noise, and then recalculates the self-power Spectral, cross-power spectrum and tensor impedance components, and the apparent resistivity defined by the impedance, the frequency of the reconstructed impedance file is approximately 6 times that of the original impedance file, greatly increasing the vertical data density and increasing the resolution and interpretation reliability. The application of the example shows that the method is correct, effective and reliable, and has the promotion value.