Determination of sea level variations in Turkish Mediterranean coast using GNSS reflectometry.

Autor: Beşel, Cansu, Kayıkçı, Emine Tanır
Předmět:
Zdroj: Survey Review; Jul2022, Vol. 54 Issue 385, p310-319, 10p
Abstrakt: 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. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index