2021
DOI: 10.3389/feart.2021.722019
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Accuracy Evaluation of Altimeter-Derived Gravity Field Models in Offshore and Coastal Regions of China

Abstract: Satellite radar altimetry has made unique contributions to global and coastal gravity field recovery. This paper starts with a general introduction followed by the progress of satellite radar altimetry technology. Then, the methods of marine gravity field recovery and dominating gravity models are described briefly. Finally, typical gravity models are compared with shipboard gravity measurements to evaluate their accuracies in offshore and coastal regions of China. The root mean squares of deviations between g… Show more

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Cited by 13 publications
(2 citation statements)
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“…We used the Jason-1/GM dataset with dense spatial distribution to conduct experiments in the South China Sea region. This data was subjected to error correction and waveform retracking to construct a reliable data set for the experiment [41]. In order to fully verify the validity of the method, we arbitrarily selected two coastal sub-regions with relatively dense ship data distribution; both sea and a small portion of land were included in two areas.…”
Section: Discussionmentioning
confidence: 99%
“…We used the Jason-1/GM dataset with dense spatial distribution to conduct experiments in the South China Sea region. This data was subjected to error correction and waveform retracking to construct a reliable data set for the experiment [41]. In order to fully verify the validity of the method, we arbitrarily selected two coastal sub-regions with relatively dense ship data distribution; both sea and a small portion of land were included in two areas.…”
Section: Discussionmentioning
confidence: 99%
“…For areas with a depth less than 1,000 m, topo_24.1 has the highest accuracy (RMS = 67.9 m), followed by NLM (RMS = 75.2 m), DTU18BAT is the worst (RMS = 109.0 m), and NLM has little improvement over LM. This result can be attributed to two aspects: (a) the accuracy of the altimetry‐derived gravity in the shallow depth areas is low (Q. Li et al., 2021; Sandwell et al., 2013), and the construction of the bathymetry model mainly depends on the ship soundings. (b) the topo_24.1 contains more shipborne soundings than just NGDC single‐beam, such as the SIO and the Lamont Doherty Earth Observatory datasets, and some private data (Smith & Sandwell, 1997).…”
Section: Numerical Experimentsmentioning
confidence: 99%