2008年3月14日在扁都口加密观测区开展了MODIS的地面同步观测，测量参数包括：地表红外辐射温度、地表物理温度、土壤剖面重量含水量（0-1cm、1-3cm、3-5cm、5-10cm及10-20cm，部分样方只测量到了5cm）、表层土壤冻结深度。目的是反演土壤冻结深度。该日的地面测量时间范围是12:00-15:00，地面同步测量样方包括扁都口C1样地、扁都口W2样地、扁都口B2样地。\n
\n1）土壤冻结深度的测量方法是通过用筷子插入土壤感觉其硬度或者将土壤表层冻结层直接挖出测量冻结层厚度，来判断冻融深度。直尺直接测量，当土壤硬度较大并且有冰晶时，认为土壤冻结；反之，则认为土壤未冻。土壤粗糙度数据可以认为在试验期间没有变化，可以从其它时间的粗糙度数据集中获得。 时间范围是11:37-12:11。\n
\n2）含水量测量方法是：取0-1cm、1-3cm、3-5cm5-10cm、10-20cm土样，放入自封袋，然后用微波炉烘干，计算其土壤重量含水量。\n
\n3）地表温度测量仪器是手持式红外温度计，同时测量了辐射温度和物理温度，并记录了测量地点的地表覆盖类型。测量时手持式红外温度计采用近距测量模式。地表物理温度采用手持式红外温度计附带的热电偶温度计。\n
\n4）土壤粗糙度数据可以认为在试验期间没有变化，可以从其它时间的粗糙度数据集中获得。", "ds_source": "
2008年3月14日在扁都口加密观测区开展了MODIS的地面同步观测，测量参数包括：地表红外辐射温度、地表物理温度、土壤剖面重量含水量（0-1cm、1-3cm、3-5cm、5-10cm及10-20cm，部分样方只测量到了5cm）、表层土壤冻结深度。目的是反演土壤冻结深度。\n\n
\n该日的地面测量时间范围是12:00-15:00，地面同步测量样方包括扁都口C1样地、扁都口W2样地、扁都口B2样地。", "ds_process_way": "
1）土壤冻结深度的测量方法是通过用筷子插入土壤感觉其硬度或者将土壤表层冻结层直接挖出测量冻结层厚度，来判断冻融深度。直尺直接测量，当土壤硬度较大并且有冰晶时，认为土壤冻结；反之，则认为土壤未冻。土壤粗糙度数据可以认为在试验期间没有变化，可以从其它时间的粗糙度数据集中获得。 时间范围是11:37-12:11。\n
\n2）含水量测量方法是：取0-1cm、1-3cm、3-5cm5-10cm、10-20cm土样，放入自封袋，然后用微波炉烘干，计算其土壤重量含水量。\n
\n3）地表温度测量仪器是手持式红外温度计，同时测量了辐射温度和物理温度，并记录了测量地点的地表覆盖类型。测量时手持式红外温度计采用近距测量模式。地表物理温度采用手持式红外温度计附带的热电偶温度计。\n
\n4）土壤粗糙度数据可以认为在试验期间没有变化，可以从其它时间的粗糙度数据集中获得。", "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,扁都口加密观测区,上游寒区水文实验站", "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": 253684, "ds_files_count": 2, "ds_format": "word,txt", "ds_space_res": null, "ds_time_res": "时", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "4a89f8ad-f8ff-4000-a6ac-cb43f675b97c.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.db1914.2022", "subject_codes": [ "170.4510" ], "quality_level": 3, "publish_time": "2022-03-16 08:53:47", "last_updated": "2025-06-30 16:05:49", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.NIEER.2021.1762", "license": null, "i18n": { "en": { "title": "Heihe integrated remote sensing joint test: MODIS ground synchronous observation data set in biandukou encrypted observation area (March 14, 2008)", "ds_format": "word,txt", "ds_source": "
On March 14, 2008, MODIS ground synchronous observation was carried out in biandukou intensive observation area. The measurement parameters include: surface infrared radiation temperature, surface physical temperature, soil profile weight and water content (0-1cm, 1-3cm, 3-5cm, 5-10cm and 10-20cm, only 5cm was measured in some quadrats) and surface soil freezing depth. The purpose is to retrieve the soil freezing depth.\n
\nThe ground survey time range on that day is 12:00-15:00. The ground synchronous survey quadrats include Bian Du Kou C1 sample plot, Bian Du Kou W2 sample plot and Bian Du Kou B2 sample plot.", "ds_quality": "
Good data quality", "ds_ref_way": "", "ds_abstract": "
On March 14, 2008, MODIS ground synchronous observation was carried out in biandukou intensive observation area. The measurement parameters include: surface infrared radiation temperature, surface physical temperature, soil profile weight and water content (0-1cm, 1-3cm, 3-5cm, 5-10cm and 10-20cm, only 5cm was measured in some quadrats) and surface soil freezing depth. The purpose is to retrieve the soil freezing depth. The ground survey time range on that day is 12:00-15:00. The ground synchronous survey quadrats include Bian Du Kou C1 sample plot, Bian Du Kou W2 sample plot and Bian Du Kou B2 sample plot.\n
\n1) The measurement method of soil freezing depth is to judge the freezing and thawing depth by inserting chopsticks into the soil to feel its hardness or directly digging out the frozen layer on the surface of the soil to measure the thickness of the frozen layer. Measured directly with a ruler, when the soil hardness is large and there are ice crystals, it is considered that the soil is frozen; On the contrary, it is considered that the soil is not frozen. The soil roughness data can be considered as unchanged during the test and can be obtained from the roughness data set at other times. The time range is 11:37-12:11.\n
\n2) The water content measurement method is: take 0-1cm, 1-3cm, 3-5cm, 5-10cm and 10-20cm soil samples, put them into self sealing bags, and then dry them in microwave oven to calculate the soil weight and water content.\n
\n3) The surface temperature measuring instrument is a hand-held infrared thermometer, which measures the radiation temperature and physical temperature at the same time, and records the surface coverage type of the measuring location. When measuring, the handheld infrared thermometer adopts the short-range measurement mode. The surface physical temperature adopts the thermocouple thermometer attached to the hand-held infrared thermometer.\n
\n4) The soil roughness data can be considered as unchanged during the test and can be obtained from the roughness data set at other times.
", "ds_time_res": "时", "ds_acq_place": "Heihe River Basin, biandukou intensive observation area, upstream cold region hydrological experimental station", "ds_space_res": "", "ds_projection": "", "ds_process_way": "1) The measurement method of soil freezing depth is to judge the freezing and thawing depth by inserting chopsticks into the soil to feel its hardness or directly digging out the frozen layer on the surface of the soil to measure the thickness of the frozen layer. Measured directly with a ruler, when the soil hardness is large and there are ice crystals, it is considered that the soil is frozen; On the contrary, it is considered that the soil is not frozen. The soil roughness data can be considered as unchanged during the test and can be obtained from the roughness data set at other times. The time range is 11:37-12:11.\n
\n2) The water content measurement method is: take 0-1cm, 1-3cm, 3-5cm, 5-10cm and 10-20cm soil samples, put them into self sealing bags, and then dry them in microwave oven to calculate the soil weight and water content.\n
\n3) The surface temperature measuring instrument is a hand-held infrared thermometer, which measures the radiation temperature and physical temperature at the same time, and records the surface coverage type of the measuring location. When measuring, the handheld infrared thermometer adopts the short-range measurement mode. The surface physical temperature adopts the thermocouple thermometer attached to the hand-held infrared thermometer.\n
\n4) The soil roughness data can be considered as unchanged during the test and can be obtained from the roughness data set at other times.", "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, "license_type": "CC BY 4.0", "ds_topic_tags": [ "地面同步观测", "土壤物理温度", "MODIS", "土壤冻结深度", "地表辐射温度", "手持式红外温度计", "土壤水分", "植被覆盖度", "地表粗糙度" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "扁都口加密观测区", "黑河流域", "上游寒区水文试验区" ], "ds_time_tags": [ 2008 ], "ds_contributors": [ { "true_name": "赵少杰", "email": "geo_zhao@126.com", "work_for": "北京师范大学", "country": "中国" }, { "true_name": "赵天杰", "email": "zhaotj@radi.ac.cn", "work_for": "中国科学院遥感与数字地球研究所", "country": "中国" }, { "true_name": "任华忠", "email": "renhuazhong@pku.edu.cn", "work_for": "北京大学遥感与地理信息系统研究所", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "赵少杰", "email": "geo_zhao@126.com", "work_for": "北京师范大学", "country": "中国" } ], "ds_managers": [ { "true_name": "赵少杰", "email": "geo_zhao@126.com", "work_for": "北京师范大学", "country": "中国" } ], "category": "遥感及产品" }