Retrieval of sea ice thickness from the reflected signal of a satellite navigation system,International Journal of Remote Sensing

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Retrieval of sea ice thickness from the reflected signal of a satellite navigation system
International Journal of Remote Sensing ( IF 3.0 ) Pub Date : 2020-06-30 , DOI: 10.1080/01431161.2020.1751898
Wei Wang ₁ , Qiang Gao ₂

Affiliation

ABSTRACT The thickness of sea ice is an important parameter for characterizing its severity. Therefore, we determined sea ice thickness in Bohai Bay, northeastern China, by using the reflected signal of the global navigation satellite system along with electromagnetic wave theory equations. Horizontal and vertical polarization data were used in the retrieval procedure. The retrieved sea ice thickness was verified via observational experiments in three steps: The first step involved pre-processing the observation data of the reflected signal to correct the antenna gain error. Then, seawater and sea ice were distinguished based on their respective polarization indices. Finally, sea ice thickness was retrieved using the reflected signal data except for the sea water signal. The verification results showed that this method of retrieving sea ice thickness can be used to determine thicknesses of up to 0.25 m, for which the estimation error is less than 15%. In addition, the error can be decreased by improving retrieval-based algorithms and the precision of the sea ice dielectric constant. The retrieved thickness can be applied to determine whether sea ice could damage maritime facilities.

更新日期：2020-06-30

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