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The importance of coastal altimetry retracking and detiding: a case study around the Great Barrier Reef, Australia

Idris, Nurul Hazrina and Deng, Xiaoli and Andersen, Ole B. (2014) The importance of coastal altimetry retracking and detiding: a case study around the Great Barrier Reef, Australia. International Journal of Remote Sensing, 35 (5). pp. 1729-1740. ISSN 0143-1161

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Official URL: http://dx.doi.org/10.1080/01431161.2014.882032

Abstract

A new approach for improving the accuracy of altimetry-derived sea level anomalies (SLAs) near the coast is presented. Estimation of SLAs is optimized using optimal waveform retracking through a fuzzy multiple retracking system and the most appropriate detiding method. With the retracking system, fuzzy-retracked SLAs become available within 5 km of the coast; meanwhile it becomes more important to use pointwise tide modelling rather than state-of-the-art global tidal models, as the latter leave residual ocean tide signals in retracked SLAs. These improvements are demonstrated for Jason-2 waveforms in the area of the Great Barrier Reef, Australia. Comparing the retrieved SLAs with in situ tide gauge data from Townsville and Bundaberg stations showed that the SLAs from this study generally outperform those from conventional methods, demonstrating that adequate waveform retracking and detiding are equally important in bringing altimetry SLAs closer to the coast.

Item Type:Article
Uncontrolled Keywords:new approaches, ocean tides
Subjects:H Social Sciences > HD Industries. Land use. Labor
Divisions:Geoinformation and Real Estate
ID Code:62954
Deposited By: Fazli Masari
Deposited On:03 Oct 2017 12:41
Last Modified:03 Oct 2017 12:41

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