Author:
Chen Fade,Liu Lilong,Guo Fei
Abstract
Abstract
This paper presents a new sea surface height (SSH) estimation using GNSS reflectometry (GNSS-R). It is a cost-effective remote sensing technique and owns long-term stability besides high temporal and spatial resolution. Initial in-situ SSH estimates are first produced by using the SNR data of BDS (L1, L5, L7), GPS (L1, L2, L5), and GLONASS (L1, L2), of MAYG station, which is located in Mayotte, France near the Indian Ocean. The results of observation data over a period of seven days showed that the root mean square error (RMSE) of SSH estimation is about 32 cm and the correlation coefficient is about 0.83. The tidal waveform is reconstructed based on the initial SSH estimates by utilizing the wavelet de-noising technique. By comparing the tide gauge measurements with the reconstructed tidal waveform at SSH estimation instants, the SSH estimation errors can be obtained. The results demonstrate that the correlation coefficient and RMSE of the wavelet de-noising based SSH estimation is 0.95 and 19 cm, respectively. Compared with the initial estimation results, the correlation coefficient is improved by about 14.5%, while the RMSE is reduced by 40.6%.
Publisher
Springer Science and Business Media LLC
Reference33 articles.
1. Hu, Z. et al. Windows of opportunity for salt marsh vegetation establishment on bare tidal flats: The importance of temporal and spatial variability in hydrodynamic forcing. Journal of Geophysical Research: Biogeosciences 120, 1450–1469 (2015).
2. Hu, Z. et al. Dynamic equilibrium behaviour observed on two contrasting tidal flats from daily monitoring of bed-level changes. Geomorphology 311, 114–126 (2018).
3. Mitchum, G. T. Comparison of topex sea surface heights and tide gauge sea levels. Journal of Geophysical Research Oceans 99, 24541–24553 (1994).
4. Mitchum, G. T. An improved calibration of satellite altimetric heights using tide gauge sea levels with adjustment for land motion. Marine Geodesy 23, 145–166 (2000).
5. Chambers, D. P., Ries, J. C., Shum, C. K. & Tapley, B. D. On the use of tide gauges to determine altimeter drift. Journal of Geophysical Research Oceans 103, 12885–12890 (1998).
Cited by
22 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献