| Citation: | ZHANG Yun, XIE Xiangfang, MENG Wanting, et al. Bohai coastal sea ice detection using BeiDou GEO satellite reflected signals[J]. Journal of Beijing University of Aeronautics and Astronautics, 2018, 44(2): 257-263. doi: 10.13700/j.bh.1001-5965.2017.0149(in Chinese)
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With the development of global navigation satellite system reflected signals (GNSS-R), its application to sea ice detection has increased recently. The angular speed of BeiDou geostationary earth orbit (GEO) satellite is small and the angle of elevation varies for only 3-4 degrees. Therefore, the space position of the specular reflection point at the same observation site is stable. The stable elevation of BeiDou GEO satellite can increase the time resolution of sea ice detection. In this paper, two experiments were performed in Bohai Bay of China to detect coastal sea ice using BeiDou GEO satellite reflected signals on January 24, 2015 and from January 30 to February 4, 2016. This paper applies the feasibility of long time continuous detection of coastal sea ice by the Beidou GEO B1 reflection signal. The first experimental results showed that sea ice concentration is correlated with the polarization ratio of Beidou GEO satellites C01 and C03. The second experimental results show that there is a positive correlation between the sea ice polarization ratio detected by GPS GEO satellites C01 and C02 and C03, and the relative values of C01, C02 and C03 polarization ratio to atmospheric temperature are 0.61, 0.72 and 0.57, respectively.
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