2008年3月14日在阿柔样方3开展了热红外比辐射率观测试验，测量仪器：便携式比辐射率测定仪（专利号：ZL 02 2 37640.2）。测量时，该样方为100%的干枯状牧草覆盖，高度＜5cm。由于草场较为均质，因此只针对阿柔样方3中每个Grid的中心点进行测量。各观测点的命名规则为A3-9的形式，表示为阿柔样方3的9号采样点。\n
\n每个中心点随机测量两次。测量时尽量选择水平地表，以保证测量角度为45度；并严格按照以下要求：\n
\n（1）加镜不加盖（Tsky）；\n
\n（2）加镜加盖（Tcha）；\n
\n（3）不加镜不加盖（Tsm）\n
\n（4）不加镜加盖（Tcm）的顺序完成一次测量。\n
\n为减小误差每个观测都读4个数。同时，在每个中心点还同步测量了4次地表热红外温度（手持式红外温度计）和手持式热像仪（FLIR ThermaCAM）测量。比辐射率的计算公式为：比辐射率=1-（Tcm^4 – Tsm^4）/（Tcha^4 – Tsky^4）。\n
\n本数据可为地表温度遥感反演算法及地表辐射能量平衡研究提供基础数据。", "ds_source": "
各观测点的命名规则为A3-9的形式，表示为阿柔样方3的9号采样点。每个中心点随机测量两次。", "ds_process_way": "
测量时尽量选择水平地表，以保证测量角度为45度；并严格按照（1）加镜不加盖（Tsky）；（2）加镜加盖（Tcha）；（3）不加镜不加盖（Tsm）及（4）不加镜加盖（Tcm）的顺序完成一次测量。为减小误差每个观测都读4个数。", "ds_quality": "
数据质量良好", "ds_acq_start_time": "2008-03-14 00:00:00", "ds_acq_end_time": "2008-03-15 00:00:00", "ds_acq_place": "黑河流域, 上游寒区水文试验区, 阿柔加密观测区", "ds_acq_lon_east": 100.44305555555556, "ds_acq_lat_south": 38.04333333333333, "ds_acq_lon_west": 100.58972222222222, "ds_acq_lat_north": 38.973888888888894, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 85072924, "ds_files_count": 2, "ds_format": "excel", "ds_space_res": null, "ds_time_res": "分、日、次", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "8f7ec2cb-7c4d-49e6-8ea3-9a197c720637.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "本数据由“黑河综合遥感联合试验”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": "14df1d8b-6362-4c0f-b88e-b46d4abe5db9", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596 ", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "10.12072/ncdc.NIEER.db1919.2022", "subject_codes": [ "170.4510" ], "quality_level": 3, "publish_time": "2022-03-16 09:09:57", "last_updated": "2025-06-30 16:06:26", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.NIEER.2021.1911", "i18n": { "en": { "title": "Heihe River Integrated Remote Sensing joint experiment: thermal infrared specific emissivity observation data set in ARW intensive observation area (2008)", "ds_format": "excel", "ds_source": "
The naming rule of each observation point is in the form of a3-9, which is expressed as the No. 9 sampling point of a rou quadrat 3. Each center point is randomly measured twice.", "ds_quality": "
Good data quality", "ds_ref_way": "", "ds_abstract": "
On March 14, 2008, the thermal infrared specific emissivity observation test was carried out in arrou sample 3. The measuring instrument is a portable specific emissivity meter (Patent No.: ZL 02 2 37640.2). During measurement, the quadrat is covered with 100% dry forage, and the height is less than 5cm. Since the grassland is relatively homogeneous, only the center point of each grid in arrou quadrat 3 is measured. The naming rule of each observation point is in the form of a3-9, which is expressed as the No. 9 sampling point of a rou quadrat 3.\n
\nEach center point is randomly measured twice. The horizontal surface shall be selected as far as possible to ensure that the measurement angle is 45 degrees; And in strict accordance with the following requirements:\n
\n（ 1) Add mirror without cover (tsky);\n
\n（ 2) Mirror capping (Tcha);\n
\n（ 3) No mirror, no cover (TSM)\n
\n（ 4) Complete one measurement without mirror capping (TCM).\n
\nTo reduce the error, read 4 numbers for each observation. At the same time, the surface thermal infrared temperature (hand-held infrared thermometer) and hand-held thermal imager (FLIR thermacam) were measured simultaneously for 4 times at each central point. The calculation formula of specific emissivity is: specific emissivity = 1 - (TCM ^ 4 – TSM ^ 4) / (Tcha ^ 4 – tsky ^ 4).\n
\nThis data can provide basic data for remote sensing inversion algorithm of surface temperature and surface radiation energy balance.
", "ds_time_res": "分、日、次", "ds_acq_place": "Heihe River Basin, upstream cold region, hydrological test area", "ds_space_res": "", "ds_projection": "", "ds_process_way": "The horizontal surface shall be selected as far as possible to ensure that the measurement angle is 45 degrees; And in strict accordance with (1) adding mirrors without capping (tsky)（ 2) Mirror capping (Tcha)（ 3) Complete one measurement in the order of no mirror and no cover (TSM) and (4) no mirror and no cover (TCM). To reduce the error, read 4 numbers for each observation.", "ds_ref_instruction": "This data was generated by the \"Heihe Comprehensive Remote Sensing Joint Experiment\". When using the data, please clearly state the source of the data in the main text and cite the citation provided by this metadata in the reference section." } }, "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, "ds_topic_tags": [ "便携式比辐射率测定仪", "比辐射率", "热像仪", "地表辐射温度", "手持式红外温度计", "机载地面遥感" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域", "上游寒区水文试验区", "阿柔加密观测区" ], "ds_time_tags": [ 2008 ], "ds_contributors": [ { "true_name": "晋锐", "email": "jinrui@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": "晋锐", "email": "jinrui@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": "晋锐", "email": "jinrui@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" }