{"id":"ff60ff21-516e-42fd-bfa5-7a8572a6426c","title":"南北极冰盖哨兵一号超宽幅SAR数据（2015-2016）","title_en":"Sentinel-1 EW SAR data for Antarctic and Arctic ice sheets (2015-2016)","serial":"地球大数据科学工程专项时空三极环境项目","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":"","description":"Sentinel-1A/B卫星使用近极地太阳同步轨道，轨道高度693 km，轨道倾角98.18°，轨道周期99 min，搭载了C波段合成孔径雷达(SAR)，设计使用寿命为7年(预期12年)Sentinel-l 具有多种成像方式，可实现单极化、双极化等不同的极化方式。Sentinel-1A SAR共有4种工作模式：条带模式(Strip Map Mode，SM)、超宽幅模式 (Extra Wide Swath，EW)、宽幅干涉模式 (Interferometric Wide Swath，IW) 和波模式 (Wave Mode，WV)。A星于2014年4月成功发射，同一区域重访周期为12天，B星2016年4月成功在轨运行，目前重返周期达到3-6天，双星运行以后，南极地区S1数据获取频率大幅度增加。\n本数据集为南极冰盖和格陵兰冰盖地区哨兵一号SAR数据。\n该数据波段为C波段超宽幅地距多视数据，分辨率为20m*40m, 时间分辨率和往返周期有关，为12天，幅宽为400km，噪声水平为-25dB，辐射测量精度1.0dB。\n本数据每年覆盖时间为：南极10月到来年3月，格陵兰4月到9月；覆盖范围南极冰盖冰架地区和格陵兰冰盖。","doi":"10.11888/GlaciolGeocryol.tpe.00000030.file","projection":"","language":"zh","share_type":"online","east":20.0,"west":110.0,"south":55.0,"north":85.0,"scale":null,"crs":"","filesize":1500000.0,"share_policy":"a","ts_created":"2018-02-24T16:59:32+08:00","doi_type":null,"ts_updated":"2021-04-19T20:21:42.533122+08:00","time_description":"","datas_group":3,"time_description_en":null,"data_format":"tif","project":[10,11],"specials":["b4b306da-eab1-47ef-ae5d-be2556298efd","5f218875-5eed-4939-8208-7bf54c573e42"],"cite":"Copernicus Open Access Hub, European Space Agency: https://scihub.copernicus.eu","review_status":5,"review_invite":[],"review_editor":{"id":21057,"last_login":"2022-04-02T11:43:37.753860+08:00","username":"gecm","email":"gechm@lzb.ac.cn","is_active":true,"is_staff":true,"user_name":"盖春梅"},"data_sources":"","temporal_resolution":"","spatial_resolution":"","license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[],"subtopics":{"metadata":"ff60ff21-516e-42fd-bfa5-7a8572a6426c","three_pole":null,"third_pole":null},"username":"","review_time":null,"protected_duration":6,"protected_describe":null,"is_important":false,"hit_count":4931}