2012年8月1日在黑河上游加密观测区东支、阿柔和西支，开展了样带、样方机载PLMR飞行地面同步观测。PLMR（Polarimetric L-band Multibeam Radiometer）是双极化（H/V）的L波段微波辐射计，中心频率1.413 GHz，带宽24 MHz，分辨率1 km （相对航高3 km），有6个beam同时观测，入射角为±7º，±21.5º，±38.5º，灵敏度<1K。飞行主要覆盖中游人工绿洲生态水文试验区。\n
本地面同步数据集可为发展和验证被动微波遥感反演土壤水分算法提供基本地面数据集。\n
样方及采样策略：观测区涉及范围较大，因此在八宝河东支和西支均采用一条样带观测，观测点间隔50 m，采样中考虑到距离过长，为保证与飞行观测尽量同步，每隔一定距离开展观测。在阿柔草场设置2个样方，分别为1.5 km×0.6 km 和0.85 km×0.6 km，在这两个样方上采样点南北间隔100 m，东西间隔50 m。\n使用4台Hydraprobe Data Acquisition System （HDAS，参考文献2）和3台POGO便携式土壤传感器同时测量。
\n测量内容：观测获得土壤温度、土壤水分（体积含水量）、损耗正切、土壤电导率、土壤复介电实部及虚部。植被参数观测选择在一些具有代表性的土壤水分采样点开展，完成了覆盖度、株高和生物量（植被含水量）的测量。\n
数据：本数据集包括土壤水分观测和植被观测两部分，前者保存数据格式为矢量文件，空间位置即为各采样点位置（WGS84+UTM 47N），土壤水分等测量信息记录在属性文件中；植被采样信息记录在EXCEL表格中。
", "ds_source": "PLMR（Polarimetric L-band Multibeam Radiometer）是双极化（H/V）的L波段微波辐射计，中心频率1.413 GHz，带宽24 MHz，分辨率1 km （相对航高3 km），有6个beam同时观测，入射角为±7º，±21.5º，±38.5º，灵敏度<1K。飞行主要覆盖中游人工绿洲生态水文试验区。", "ds_process_way": "
样方及采样策略：观测区涉及范围较大，因此在八宝河东支和西支均采用一条样带观测，观测点间隔50 m，采样中考虑到距离过长，为保证与飞行观测尽量同步，每隔一定距离开展观测。在阿柔草场设置2个样方，分别为1.5 km×0.6 km 和0.85 km×0.6 km，在这两个样方上采样点南北间隔100 m，东西间隔50 m。使用4台Hydraprobe Data Acquisition System （HDAS，参考文献2）和3台POGO便携式土壤传感器同时测量。\n
测量内容：观测获得土壤温度、土壤水分（体积含水量）、损耗正切、土壤电导率、土壤复介电实部及虚部。植被参数观测选择在一些具有代表性的土壤水分采样点开展，完成了覆盖度、株高和生物量（植被含水量）的测量。
", "ds_quality": "数据质量良好
", "ds_acq_start_time": "2018-11-26 00:00:00", "ds_acq_end_time": "2018-11-26 00:00:00", "ds_acq_place": "黑河流域，上游寒区水文试验区", "ds_acq_lon_east": 101.15, "ds_acq_lat_south": 37.83305555555556, "ds_acq_lon_west": 98.9, "ds_acq_lat_north": 38.86638888888889, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "apply-access", "ds_total_size": 483561, "ds_files_count": 2, "ds_format": "excel", "ds_space_res": null, "ds_time_res": "日", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "1cbf226e-ebef-4162-8192-bdc44abc9d84.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "本数据由“黑河生态水文遥感试验（HiWATER）”产生，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。", "ds_from_station": null, "organization_id": "c94b3578-20da-4346-9de9-c702b6ca8983", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": null, "quality_level": 3, "publish_time": "2021-08-31 11:36:58", "last_updated": "2023-08-23 16:47:35", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.NIEER.2021.1701", "i18n": { "en": { "title": "Remote sensing experiment on ecological hydrology of Heihe River on August 1, 2012: plmr ground synchronous observation data set in the upper reaches of Heihe River Basin", "ds_format": "", "ds_source": "Plmr (polarimetric L-band multibeam radiometer) is a dual polarization (H / V) L-band microwave radiometer with center frequency of 1.413 GHz, bandwidth of 24 MHz, resolution of 1 km (relative altitude of 3 km), simultaneous observation of 6 beams, incident angle of ± 7 º, ± 21.5 º, ± 38.5 º and sensitivity < 1K. The flight mainly covers the ecological and hydrological test area of artificial oasis in the middle reaches.", "ds_quality": "
Good data quality
", "ds_ref_way": "", "ds_abstract": "On August 1, 2012, airborne plmr flight ground synchronous observation of transect and quadrat was carried out in the East branch and West Branch of the intensive observation area in the upper reaches of Heihe River. Plmr (polarimetric L-band multibeam radiometer) is a dual polarization (H / V) L-band microwave radiometer with center frequency of 1.413 GHz, bandwidth of 24 MHz, resolution of 1 km (relative altitude of 3 km), simultaneous observation of 6 beams, incident angle of ± 7 º, ± 21.5 º, ± 38.5 º, sensitivity & lt; 1K。 The flight mainly covers the ecological and hydrological test area of artificial oasis in the middle reaches
\nThe local surface synchronous data set can provide a basic ground data set for the development and verification of passive microwave remote sensing soil moisture retrieval algorithm
\nQuadrat and sampling strategy: the observation area covers a large area. Therefore, one transect is used for observation in the East branch and West Branch of Babao River, with an interval of 50 m. considering the long distance in sampling, in order to ensure synchronization with flight observation as much as possible, observation is carried out at a certain distance. Two quadrats, 1.5 km in length, are set in Arao grassland × 0.6 km and 0.85 km × 0.6 km. On these two quadrats, the sampling points are 100 m from north to South and 50 m from east to west.\nFour hydroprobe data acquisition systems (HDAS, ref. 2) and three pogo portable soil sensors were used for simultaneous measurement
\nMeasurement contents: soil temperature, soil moisture (volume water content), loss tangent, soil conductivity, real and imaginary parts of soil complex dielectric are observed and obtained. Vegetation parameter observation was carried out at some representative soil moisture sampling points, and the measurements of coverage, plant height and biomass (vegetation moisture content) were completed
\nData: this data set includes two parts: soil moisture observation and vegetation observation. The former saves data in vector file, the spatial location is the location of each sampling point (WGS84 + UTM 47N), and the measurement information such as soil moisture is recorded in the attribute file; Vegetation sampling information is recorded in Excel table
", "ds_time_res": "日", "ds_acq_place": "Heihe River Basin, upstream cold region, hydrological test area", "ds_space_res": "", "ds_projection": "", "ds_process_way": "Quadrat and sampling strategy: the observation area covers a large area. Therefore, one transect is used for observation in the East branch and West Branch of Babao River, with an interval of 50 m. considering the long distance in sampling, in order to ensure synchronization with flight observation as much as possible, observation is carried out at a certain distance. Two quadrats, 1.5 km in length, are set in Arao grassland × 0.6 km and 0.85 km × 0.6 km. On these two quadrats, the sampling points are 100 m from north to South and 50 m from east to west. Four hydroprobe data acquisition systems (HDAS, ref. 2) and three pogo portable soil sensors were used for simultaneous measurement
\nMeasurement contents: soil temperature, soil moisture (volume water content), loss tangent, soil conductivity, real and imaginary parts of soil complex dielectric are observed and obtained. Vegetation parameter observation was carried out at some representative soil moisture sampling points, and the measurements of coverage, plant height and biomass (vegetation moisture content) were completed
", "ds_ref_instruction": " \nThis data is generated by \"Heihe eco hydrological remote sensing experiment (hiwater)\". When using the data, users should clearly state the source of the data in the text and quote the reference method provided by this metadata in the reference part." } }, "submit_center_id": "ncdc", "data_level": 0, "recommendation_value": 0, "license_type": "https://creativecommons.org/licenses/by/4.0/", "doi_reg_from": "reg_local", "cstr_reg_from": "reg_local", "doi_not_reg_reason": null, "cstr_not_reg_reason": null, "is_paper_in_submitting": false, "belong_to_nieer": false, "ds_topic_tags": [ "机载微波辐射计", "亮度温度", "地面同步观测", "土壤水分", "土壤", "植被", "生物量", "土壤湿度", "土壤温度", "植被盖度" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "上游寒区水文试验区", "黑河流域" ], "ds_time_tags": [ 2012 ], "ds_contributors": [ { "true_name": "王树果", "email": "sgwang@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" }, { "true_name": "李新", "email": "lixin@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" }, { "true_name": "马明国", "email": "mmg@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "王树果", "email": "sgwang@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "ds_managers": [ { "true_name": "马明国", "email": "mmg@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" }, { "true_name": "王树果", "email": "sgwang@lzb.ac.cn", "work_for": "中国科学院西北生态环境资源研究院", "country": "中国" } ], "category": "遥感及产品" }