GPS-IR for accurate tide gauge measurement at South Beach, Oregon, United States

Abstract

Global positioning system-Interferometric Reflectometry (GPS-IR) method is applied to
measure the sea level measurement by utilizing the geodetic quality of GPS receiver for
detecting the adjacent ecosystem, including the advantages of climate related or non-related
sea level information. The comparative analysis of tide gauge (TG) measurement
interpretations collaborates with an essential role for nowcasting and forecasting variability
within the selected region. In recent years, Auto-Regressive Moving Average (ARMA) and
Singular Spectrum Analysis (SSA) have been showed to be the strong techniques providing a
comparatively perfect estimation in time-series evaluation comparable to the fashionable
methods. In the current study, GPS derived TG (GPS-TG) records from the station named SEPT
(44.63 ⁰N, 124.05 ⁰W) located at South Beach, Oregon, USA are predicted with the ARMA
(ARMA-TG) and SSA (SSA-TG) methods. The analysis demonstrates that the GPS-TG is
correlated with SSA-TG about 99.8% and has a correlation of about 98.1% with ARMA-TG
predicted values. We believe the methodology applied in the current study will contribute to
the numerical modeling of TG records as well as other studies related to the reflectometry
techniques.