【摘要】 针对全球卫星导航系统多径反射(GNSS-IR)反演潮位值时易出现时间分辨率不足,而当前常用的多模多频法不适用于所有测站,加窗法会使反演结果精度降低的问题,提出1种小波分析反演方法:利用小波变换分析方法提取信噪比序列的瞬时频率,然后反演瞬时潮位值;最后分别以美国SC02站17 d数据和香港HKQT站13 d数据加以验证,并与经典法、加窗法的反演结果进行分析比较。实验结果表明,用小波变换分析法反演潮位值的精度能达分米级,并且可由原先1段信噪比序列反演1个潮位值提升至单历元信噪比反演1个潮位值,反演点个数大幅增加。更多还原

【Abstract】 Aiming at the problems that it is apt to be insufficient for the time resolution, and two usual methods, the multisystem method is not applicable to all stations, and the windowing method reduces the accuracy of the inversion results in the tide value inversion of GNSS-IR, the paper proposed an inversion method using wavelet analysis: the instantaneous frequency of signalto-noise ratio(SNR) sequence was extracted with the wavelet transform analysis method, and the instantaneous tide level values were inverted; then the 17-day data of the US SC02 station and the 13-day data of the Hong Kong HKQT station were used to implement the verification, and the inversion results of the classical method and windowing method were used to do the comparative analysis finally. Experimental result showed that: the method could have an accuracy of dm level, and a tide value could be inverted with a single epoch SNR, improved from inverted with a sequence of SNR, which means an increased number of inverted points.更多还原