Can sea ice thickness be retrieved using GNSS-interferometric reflectometry?

Can sea ice thickness be retrieved using GNSS-interferometric reflectometry?
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可以使用 GNSS 干涉反射仪反演海冰厚度吗?

DOI:
10.1007/s10291-022-01309-0
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发表时间:
2022-08
期刊:
影响因子:
4.9
通讯作者:
Lei Yang
Lei Yang
中科院分区:
工程技术1区
文献类型:
--
作者:
Feng Wang;Dongkai Yang;Bo Zhang;Lei Yang

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A method for retrieving snow and sea ice thickness is developed and simulations are conducted to evaluate the feasibility of the proposed method. When using a defined envelope amplitude and phase, for the snow-free case, RMSEs of 0.24 and 0.34 m can be obtained; for the snow-covered case, the RMSEs of the retrieved sea ice thickness decrease to 0.45 and 0.48 m, and the RMSEs of the retrieved snow thickness are 0.12 and 0.13 m. A method combining the envelope amplitude and phase is proposed to further improve the retrieval accuracy. The simulated results show that combining these two observables can provide an RMSE of 0.19 m for the snow-free case, and for the snow-covered case, the RMSEs of the retrieved snow and sea ice thicknesses are reduced to 0.09 and 0.42 m, respectively. Furthermore, linear polarization observations are proposed and tested. The vertical polarization shows the best measurement performance. When the envelope amplitude and phase of the vertical polarization carrier to noise ratio (CNR) are combined to retrieve snow and sea ice thicknesses, the RMSEs of the retrieved sea ice thickness for the snow-free case decrease to 0.13, and for the snow-covered case, the RMSEs of the retrieved snow and sea ice thicknesses decrease to 0.07 and 0.17 m, respectively.
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