Global Navigation Satellite System Reflectometry (GNSS-R) can be used to measure sea level heights based on reflected signals recorded as oscillations in signal-to-noise ratio (SNR) data. This study utilizes the SNR data from an existing MERS, located in Erdemli, Mersin on the Mediterranean coast of Turkey over a one-year time period. The dominant multipath frequency in the SNR data is derived with two methods presented in this study: the Lomb-Scargle periodogram (LSP) and the LSP with the Moving Average (MA) filtering. The results of both methods are compared in terms of the accuracy and correlation with respect to sea level records from the nearby Erdemli tide gauge. The correlations between the GNSS-R and tide gauge by using the LSP are 0.88 and 0.84 for GPS L1 and L5 signals, respectively. With the LSP with MA method, the correlations are increased by 0.91 and 0.88 for GPS L1 and L5 signals, respectively.

全球导航卫星系统反射仪 (GNSS-R) 可用于根据记录为信噪比 (SNR) 数据中的振荡的反射信号来测量海平面高度。本研究利用了位于土耳其地中海沿岸梅尔辛的 Erdemli 的现有 MERS 在一年时间内的 SNR 数据。SNR 数据中的主要多径频率是通过本研究中提出的两种方法得出的：Lomb-Scargle 周期图 (LSP) 和带有移动平均 (MA) 滤波的 LSP。两种方法的结果在准确性和相关性方面与附近 Erdemli 验潮仪的海平面记录进行了比较。对于 GPS L1 和 L5 信号，使用 LSP 的 GNSS-R 和潮位计之间的相关性分别为 0.88 和 0.84。使用带有 MA 方法的 LSP，