{"id":"ab279d68-9fc2-46aa-96be-d29495819bb2","title":"南北极冰盖冰裂隙数据 V1.0（2015-2019）","title_en":"Ice crack dataset of Antarctican and Greenland V1.0 (2015-2019)","serial":"","user_limit":"为尊重知识产权、保障数据作者的权益、扩展数据中心的服务、评估数据的应用潜力，请数据使用者在使用数据所产生的研究成果中（包括公开发表的论文、论著、数据产品和未公开发表的研究报告、数据产品等成果），明确注明数据来源和数据作者。对于转载（二次或多次发布）的数据，作者还须注明原始数据来源。","instructions":"按照数据时间范围命名","description":"基于sentinel-1超分宽幅SAR数据，利用提出的U-net冰裂隙探测方法，形成了南北极冰盖冰裂隙高程数据。首先对sentinel-1超分宽幅SAR数据预处理，主要包括辐射定标、冰盖范围确定和斑点噪声去除。其中，为抑制SAR数据的斑点噪声，同时为了保证冰裂隙特征，我们采用了去除乘性噪声的PPB方法。该方法既能有效去除斑点，还能保留冰裂隙的特征。其次，我们利用提出的基于U-net的冰裂隙探测算法进行冰裂隙提取。为了获取正确冰裂隙SAR数据样本，我们通过比对冰裂隙高分辨率光学数据来对SAR样板进行选取，从而形成冰裂隙SAR数据样本。基于冰裂隙区域和非冰裂隙区域SAR数据样本，我们利用U-net方法对冰裂隙进行提取。最后，我们对探测出的冰裂隙数据进行地理编码形成南北极冰盖冰裂隙产品。","doi":"10.11888/Glacio.tpdc.270984","projection":"","language":"zh","share_type":"online","east":90.0,"west":-90.0,"south":-90.0,"north":90.0,"scale":null,"crs":null,"filesize":4048.0,"share_policy":"a","ts_created":"2019-10-24T23:35:25.938861+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-04-19T18:05:26.681148+08:00","time_description":"","datas_group":3,"time_description_en":"","data_format":null,"project":[10,11],"specials":["b4b306da-eab1-47ef-ae5d-be2556298efd","5f218875-5eed-4939-8208-7bf54c573e42"],"cite":null,"review_status":5,"review_invite":[],"review_editor":{"id":21056,"last_login":"2022-02-09T12:02:24.544987+08:00","username":"huxiaoli","email":"huxiaoli@lzb.ac.cn","is_active":true,"is_staff":true,"user_name":"胡晓利"},"data_sources":"","temporal_resolution":"Yearly","spatial_resolution":"m","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[5],"subtopics":{"metadata":"ab279d68-9fc2-46aa-96be-d29495819bb2","three_pole":"XDA19070202","third_pole":null},"username":"","review_time":"2019-10-26T22:32:58.426916+08:00","protected_duration":null,"protected_describe":null,"is_important":false,"hit_count":2327}