Investigação da influência das posições das trilhas dos satélites altimétricos nas diferenças entre níveis médios do mar do modelo de MSS CLS22 e de observações maregráficas locais

Abstract

Coastal monitoring in Brazil is challenging due to the extensive coastline of 7,637 km and the complexity of measuring sea level. Various techniques, including tide gauge stations (TGs) and altimetric satellites, are employed to collect data. This study aimed to analyze the influence between the positions of altimetric satellite tracks and the differences in Mean Sea Level (MSL) obtained from the CNES_CLS22 model and from the stations of the Permanent Tide Gauge Network for Geodesy (RMPG). The research revealed that the Imbituba-SC station had the smallest discrepancy between the MSL of the model and local observations, while Santana-AP showed the largest. The analysis of the distances between satellite tracks and the differences in MSL indicated that data from the CRYOSAT satellite showed a strong correlation, suggesting that this mission has a greater influence on the results of the CNES_CLS22 model.