| 机载GNSS反射信号海面测高模型的研究 |
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| 引用本文： | 张云,张杨阳,孟婉婷,杨树瑚,韩彦岭.机载GNSS反射信号海面测高模型的研究[J].海洋学报,2020,42(3):149-156. |
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| 作者姓名： | 张云 张杨阳 孟婉婷 杨树瑚 韩彦岭 |
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| 作者单位： | 1.上海海洋大学 信息学院，上海 201306 |
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| 基金项目： | 国家自然科学基金（41376178，41401489）；上海市大学青年教师基金（ZZHY13033）。 |
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| 摘 要： | 相对于岸基GNSS-R技术，机载GNSS-R优势在于其空间分辨率高、监测范围广，可对特定区域范围进行高分辨率监测，兼具了灵活的高度和方位调节的同时保障了更高的数据质量。本文主要研究了机载GNSS-R测高模型，依据岸基GNSS-R码测高原理，针对大气延迟、天线距离等进行修正，优化机载测高模型，同时采用DTU10全球海面平均高度及潮汐模型验证机载GNSS-R测高模型的精度。通过分析2011年11月11日，CSIC-IEEC在芬兰波罗的海的GNSS-R机载数据，针对不同仰角下的实验数据进行反演，成功地实现了亚米级机载海面高度反演，得出仰角大小会对测高结果精度产生较大影响的结论，定性分析了仰角大小所引起的误差范围。本文的结果证明了机载GNSS-R的海面测高的可行性。
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| 关 键 词： | GNSS-R 机载实验 海面测高 精度分析 |
| 收稿时间： | 2019/2/22 0:00:00 |
| 修稿时间： | 2019/9/6 0:00:00 |
Research on sea surface altimetry model of airborne GNSS reflected signal |
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| Zhang Yun,Zhang Yangyang,Meng Wanting,Yang Shuhu and Han Yanling.Research on sea surface altimetry model of airborne GNSS reflected signal[J].Acta Oceanologica Sinica (in Chinese),2020,42(3):149-156. |
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| Authors: | Zhang Yun Zhang Yangyang Meng Wanting Yang Shuhu and Han Yanling |
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| Institution: | 1.College of Information, Shanghai Ocean University, Shanghai 201306, China2.Shanghai Aerospace Electronic Technology Institute, Shanghai 201109, China |
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| Abstract: | Compared with shore-based GNSS-R technology, the airborne GNSS-R has the advantages of high spatial resolution, wide monitoring range, high-resolution monitoring of specific areas, and flexible height and azimuth adjustments. This paper mainly studies the airborne GNSS-R altimetry model, based on the shore-based GNSS-R code altimetry principle, corrects the atmospheric delay, antenna distance, etc., optimizes the airborne altimetry model, and uses the DTU10 global sea level average height and tide. The model verifies the accuracy of the onboard GNSS-R altimetry model. By analyzing the GNSS-R airborne data of the CSIC-IEEC in the Baltic Sea in Finland on November 11, 2011, the inversion of the experimental data at different elevation angles was successfully carried out, and the inversion of the sub-meter airborne sea surface height was successfully achieved. The conclusion that the elevation angle has a great influence on the accuracy of the altimetry results qualitatively analyzes the error range caused by the elevation angle. The results of this paper demonstrate the feasibility of sea level altimetry for airborne GNSS-R. |
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| Keywords: | GNSS-R airborne experiment sea surface altimetry accuracy analysis |
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