研究生学术报告预告登记(开题、中期、答辩)

       为加强研究生学术交流活动,推进学术创新,特开通“研究生学术报告预告区”。我校研究生和教师可以在预告区及时发布和了解有关研究生学术报告的信息,届时参加。也可就某学术报告展开专题讨论与交流。

报告人: 蒋城飞
学号: 1017227008
学院: 海洋学院
报告类型: 第二次学术报告
日期: 2019年08月1日
时间: 13:35
地点: Room 301 SunTec, Singapore
导师: 魏皓
题目: Extraction of Sea Ice in Arctic Based on HY-2A/B Satellite Altimeter Data
内容提要:

With the successful launch of HY-2B, the new satellite will be dual-star networked with HY-2A, which provides a new data source for arctic research. The Level 1b products of HY-2A/B are used for analysis. Comparison and analysis of two different retracking datasets of SMLE and OCOG were carried out. Waveform analysis shows the feasibility of the SMLE retracking algorithm on the sea ice surface. Using AGC and PP of Ku/C band as the extraction parameters to extract the sea ice, three different classification methods (Threshold,  K-Nearest Neighbor, Libsvm) were applied to  As the extraction parameters of sea ice and sea water have a large number of identical values, the noise is easy to appear with the low accuracy (10%) of the threshold method. The KNN have highly accurate, all above 92%. The accuracy of KNN is related to the value of K. The Libsvm method got a good result (higher than 88% of sea ice, higher than 74% of the sea water). HY-2B acquires a better extraction result than HY-2A. As a change of the value of K, great variation of accuracy was occurred using the Ku band. However, the result of the C band changed slightly. Using the Libsvm method, the C band has a better distinguish capacity than the Ku band in the Arctic sea ice.

图片:
登记人: 蒋城飞
登记时间: 2019年07月31日 星期三 09:40