Determination of Sea Level Variations in Turkish Mediterranean Coast Using GNSS Reflectometry

Beşel C., Tanır Kayıkçı E.

SURVEY REVIEW, vol.54, no.385, pp.310-319, 2022 (SCI-Expanded)

  • Publication Type: Article / Article
  • Volume: 54 Issue: 385
  • Publication Date: 2022
  • Doi Number: 10.1080/00396265.2021.1939589
  • Journal Name: SURVEY REVIEW
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Environment Index, Geobase, INSPEC
  • Page Numbers: pp.310-319
  • Karadeniz Technical University Affiliated: Yes


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.