{"id":"ab15179f-6767-4399-8149-a4bc906b37b3","title":"黑河综合遥感联合试验：大野口关滩森林站超级样地差分GPS定位测量数据（2008）","title_en":"WATER: Dataset of differential global position system (DGPS) measurements at the super site around the Dayekou Guantan forest station (2008)","serial":"黑河综合遥感联合试验","user_limit":"本数据由“黑河综合遥感联合试验”产生，仅限于项目使用，不对外共享。用户在使用数据时请在正文中明确声明数据的来源，并在参考文献部分引用本元数据提供的引用方式。","instructions":"","description":"超级样地由16块子样地组成，为了对样地内的每株林木定位和方便地基雷达观测基站点的定位，需要测量子样地角点及预设地基雷达基站点的大地坐标。这些点及每株林木的定位是采用全站仪测量的。由于全站仪测量的是相对坐标，若要得到大地坐标，需要在超级样地周围利用差分GPS（DGPS）高精度地测量至少1个参考点。另外，我们还用DGPS观测了子样地所有角点的大地坐标，该测量结果可形成对全站仪测量结果的校验。该数据集是基于DGPS测量得到的所有定位结果数据，不包括全站仪的定位结果。\n测量时间是2008年6月1日至13日，采用法国泰雷兹（THALES）差分GPS测量系统，型号Z-MAX。观测方法是使用两台GPS接收机进行同步静态测量，一台为基站，设置在甘肃省水源涵养林研究院旁边（该基站点的WGS大地坐标是采用Z-MAX经多站观测引自张掖市内的1个一级水准点）。另一台为流动站，放置在超级样地观测点上。每个点的观测时长为10、15、20、25、30分钟不等，具体时长根据卫星信号情况而定，信号差时多测量几分钟。采用仪器自带的处理软件进行事后差分处理得到最终的定位结果。定位结果采用WGS大地坐标系统。\n首先在超级样地旁边的开阔区测量了6个临时控制点，为全站仪测量超级样地内的林木位置提供参考点。然后在超级样地16块子样地的每个角点上安置流动站，测量了子样地角点坐标，共得到41个点的观测值。该数据集存储了这47个点的定位结果。\n该数据仅限于项目使用，不对外共享。","doi":"10.3972/water973.0152.db","projection":"4326","language":"zh","share_type":"offline","east":100.251297,"west":100.250212,"south":38.533171,"north":38.534361,"scale":null,"crs":null,"filesize":315.0,"share_policy":"b","ts_created":"2010-07-15T17:22:21+08:00","doi_type":"","ts_updated":"2021-04-19T14:17:52.754953+08:00","time_description":"","datas_group":0,"time_description_en":"","data_format":"","project":[10,11,15],"specials":["1b7ac22c-43ea-410c-b729-29786f35d16f","1e67029e-f3fe-4aa1-a183-441c82f5c93d","6740cd00-6d20-4855-a39b-863af216b0a2","4e7b97a6-ee1f-4b51-83e5-04a100993973"],"cite":"陈尔学, 刘清旺. 黑河综合遥感联合试验：大野口关滩森林站超级样地差分GPS定位测量数据. 中国林业科学院资源信息研究所. 2008. doi:10.3972/water973.0152.db [Chen Erxue, Liu Qingwang. WATER: Dataset of differential global position system (DGPS) measurements at the super site around the Dayekou Guantan forest station. Chinese Academy of Forestry. 2008. doi:10.3972/water973.0152.db]","review_status":5,"review_invite":[],"review_editor":null,"data_sources":null,"temporal_resolution":null,"spatial_resolution":null,"license":"Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)","fund":[35,36],"subtopics":{"metadata":"ab15179f-6767-4399-8149-a4bc906b37b3","three_pole":null,"third_pole":null},"username":"盖春梅","review_time":null,"protected_duration":6,"protected_describe":null,"is_important":false,"hit_count":8466}