{"id":"940b389a-5bf0-437a-a89f-ab5d5fe44360","title":"三江源MODIS-NPP产品数据集（1985-2015）","title_en":"The NPP products of MODIS in Sanjiangyuan (1985-2015)","serial":"三江源国家公园星空地一体化生态监测数据平台","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":"该数据集包含了黄河源、长江源、澜沧江三个源区的最大值合成法生产的NPP产品数据。MOD13Q1、MOD17A2以及MOD17A2H遥感产品数据来自于NASA网站（http://modis.gsfc.nasa.gov/）。MOD13Q1产品的分辨率为250 m, 16 d合成产品。MOD17A2和MOD17A2H产品数据都是8 d合成产品, MOD17A2的分辨率为 1000 m, MOD17A2H的分辨率为500 m。最终合成的MODIS NPP产品的分辨率为1km。\n下载的MOD13Q1、MOD17A2、MOD17A2H遥感数据产品, 格式为HDF, 该数据已经过大气校正、辐射校正、几何校正和去云等处理。1）MRT投影转换。将下载的数据产品进行格式和投影转换, 将HDF格式转换为TIFF格式, 将投影转换为UTM投影, 输出250 m分辨率的NDVI、250 m分辨率的EVI、1000 m和500 m两种分辨率的净光合PSNnet。2）MVC最大值合成。将与地面实测数据同期的NDVI、EVI、PSNnet采用最大值合成, 得到与实测数据对应的值。采用最大值合成法可以有效减少云、大气、太阳高度角等的影响。3)基于NASA-CASA模型生成NPP年值。","doi":"10.11888/Ecolo.tpdc.270555","projection":null,"language":"zh","share_type":"online","east":102.58,"west":89.15,"south":30.79,"north":37.38,"scale":null,"crs":null,"filesize":20.0,"share_policy":"a","ts_created":"2018-08-05T11:00:21+08:00","doi_type":"拥有自主知识产权","ts_updated":"2021-04-19T23:21:42.726974+08:00","time_description":"","datas_group":3,"time_description_en":"","data_format":"TIFF","project":[10,11,12],"specials":["d09c103c-0e37-4b09-a609-6d77c982ae37","f2a78cde-1c98-4241-94dc-7532eba32b80"],"cite":"魏彦强. 三江源MODIS-NPP产品数据集. 三江源国家公园星空地一体化生态监测数据平台.2018","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":null,"spatial_resolution":null,"license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[],"subtopics":{"metadata":"940b389a-5bf0-437a-a89f-ab5d5fe44360","three_pole":null,"third_pole":null},"username":"胡晓利","review_time":null,"protected_duration":6,"protected_describe":null,"is_important":false,"hit_count":7291}