太阳分光光度计的测量数据可以直接用来反演非水汽通道的光学厚度、瑞利散射、气溶胶光学厚度、大气气柱的水汽含量（使用水汽通道936nm处的测量数据）。此外，可以获得550nm处的各种参数，从而在MODTRAN或者6S等软件的辅助下获得水平能见度。\n
\n本次测量采用CE318太阳分光光度计，可测量9个波段的光学厚度，分别为1640nm、1020nm、936nm、870nm、670nm、550nm、440nm、380nm和340nm。 \n
\n在张掖市区观测日期为2008-03-30、2008-03-31、2008-04-01、2008-04-02，测量点位置为38°56′8.9″N，100°27′8.3″E，海拔1400m。气压：856，所有测量只在白天进行。\n
\n影响CE318数据精度的因素：当地大气压、仪器的定标参数和各个转换因子。\n
\n（1）数据预处理过程中，大气压采用了与高程有关的经验关系获得，大部分与实际不符，要得到精确的反演结果，需要同步的气象站数据；\n
\n（2）仪器定标参数误差需要进行野外定标或者仪器室内定标。室外定标：在大气参数稳定情况下，获取大气质量数在3-7之间的测量数据，利用Langly原理进行定标。室内定标：标准光源；\n
\n（3）在反演水汽通道的气溶胶光学厚度以水汽含量是需要各个转换因子，转换因子都为经验参数，实用性需要进一步验证。\n
\n1）原始数据以CE318特有文件格式.k7存储，可用ASTPWin软件打开，同时附带说明文件ReadMe.txt。 \n
\n2）预处理文件：包括利用原始数据反演获得光学厚度、瑞利散射、气溶胶光学厚度、水平能见度和近地表大气温度，以及参与计算的太阳方位角、天顶角、日地距离修正因子和大气柱质量数。仪器采用采用经典的Langley定标法，在冰沟站没有任何大气影响的情况下跟踪太阳可以接收到的太阳直射能量的电压值进行了定标。\n
\n该数据集包含了2个子文件夹和3个数据文档。子文件夹分别为：原始数据和处理后的数据。处理后的数据包括“几何位置与各个通道总的光学厚度”和“各个通道的瑞利散射和气溶胶光学厚度”两小部分。数据文档分别为：数据观测说明；原始数据文档；预处理数据文档。", "ds_source": "
太阳分光光度计的测量数据可以直接用来反演非水汽通道的光学厚度、瑞利散射、气溶胶光学厚度、大气气柱的水汽含量（使用水汽通道936nm处的测量数据）。此外，可以获得550nm处的各种参数，从而在MODTRAN或者6S等软件的辅助下获得水平能见度。", "ds_process_way": "
\n本次测量采用CE318太阳分光光度计，可测量9个波段的光学厚度，分别为1640nm、1020nm、936nm、870nm、670nm、550nm、440nm、380nm和340nm。\n
\n在张掖市区观测日期为2008-03-30、2008-03-31、2008-04-01、2008-04-02，测量点位置为38°56′8.9″N，100°27′8.3″E，海拔1400m。气压：856，所有测量只在白天进行。\n
\n影响CE318数据精度的因素：当地大气压、仪器的定标参数和各个转换因子。\n
\n（1）数据预处理过程中，大气压采用了与高程有关的经验关系获得，大部分与实际不符，要得到精确的反演结果，需要同步的气象站数据；\n
\n（2）仪器定标参数误差需要进行野外定标或者仪器室内定标。室外定标：在大气参数稳定情况下，获取大气质量数在3-7之间的测量数据，利用Langly原理进行定标。室内定标：标准光源；\n
\n（3）在反演水汽通道的气溶胶光学厚度以水汽含量是需要各个转换因子，转换因子都为经验参数，实用性需要进一步验证。
", "ds_quality": "数据质量良好", "ds_acq_start_time": "2008-03-30 00:00:00", "ds_acq_end_time": "2008-04-02 00:00:00", "ds_acq_place": "黑河流域,上游寒区水文试验区,张掖市加密观测区", "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": 327234, "ds_files_count": 2, "ds_format": "k7", "ds_space_res": null, "ds_time_res": "日", "ds_coordinate": "WGS84", "ds_projection": "", "ds_thumbnail": "21445eb6-ce3b-481c-9687-7636abb6447d.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.db1804.2022", "subject_codes": [ "170.4510" ], "quality_level": 3, "publish_time": "2022-03-14 16:42:03", "last_updated": "2023-08-18 15:45:20", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.NIEER.2021.1963", "i18n": { "en": { "title": "Heihe comprehensive remote sensing joint experiment: observation data set of solar spectrophotometer in Zhangye City (March 30-april 2, 2008)", "ds_format": "k7", "ds_source": "
The measured data of solar spectrophotometer can be directly used to retrieve the optical thickness of non water vapor channel, Rayleigh scattering, aerosol optical thickness and water vapor content of atmospheric column (using the measured data at 936 nm of water vapor channel). In addition, various parameters at 550 nm can be obtained to obtain horizontal visibility with the help of software such as MODTRAN or 6S.", "ds_quality": "
Good data quality", "ds_ref_way": "", "ds_abstract": "
The measured data of solar spectrophotometer can be directly used to retrieve the optical thickness of non water vapor channel, Rayleigh scattering, aerosol optical thickness and water vapor content of atmospheric column (using the measured data at 936 nm of water vapor channel). In addition, various parameters at 550 nm can be obtained to obtain horizontal visibility with the help of software such as MODTRAN or 6S.\n
\nCE318 solar spectrophotometer is used for this measurement, which can measure the optical thickness of 9 bands, namely 1640nm, 1020nm, 936nm, 870nm, 670nm, 550nm, 440nm, 380nm and 340nm.\n
\nIn Zhangye City, the observation dates are March 30, 2008, March 31, 2008, April 01, 2008 and April 02, 2008. The measuring points are 38 ° 56 ′ 8.9 ″ n, 100 ° 27 ′ 8.3 ″ E and 1400m above sea level. Air pressure: 856, all measurements are made only during the day.\n
\nFactors affecting CE318 data accuracy: local atmospheric pressure, instrument calibration parameters and various conversion factors.\n
\n（ 1) In the process of data preprocessing, the atmospheric pressure is obtained by using the empirical relationship related to elevation, most of which are inconsistent with the reality. In order to obtain accurate inversion results, synchronous meteorological station data are required;\n
\n（ 2) Instrument calibration parameter error requires field calibration or instrument indoor calibration. Outdoor calibration: under the condition of stable atmospheric parameters, obtain the measurement data with atmospheric mass number between 3-7, and calibrate with langly principle. Indoor calibration: standard light source;\n
\n（ 3) In retrieving the aerosol optical thickness of water vapor channel, the water vapor content needs each conversion factor. The conversion factors are empirical parameters, and their practicability needs to be further verified.\n
\n1) The original data is stored in CE318 unique file format. K7, which can be opened with astpwin software, and the description file readme.txt is attached.\n
\n2) Preprocessing files: including optical thickness, Rayleigh scattering, aerosol optical thickness, horizontal visibility and near surface atmospheric temperature obtained by inversion of original data, as well as solar azimuth, zenith angle, sun earth distance correction factor and atmospheric column mass number involved in calculation. The instrument adopts the classical Langley calibration method to track the voltage value of solar direct energy that can be received by the sun without any atmospheric influence at Binggou station.\n
\nThe dataset contains 2 subfolders and 3 data documents. Sub folders are: original data and processed data. The processed data include \"geometric position and total optical thickness of each channel\" and \"Rayleigh scattering and aerosol optical thickness of each channel\". The data documents are: data observation description; Original data documents; Preprocess data documents.
", "ds_time_res": "日", "ds_acq_place": "Heihe River Basin, upstream cold region, hydrological test area, Zhangye intensive observation area", "ds_space_res": "", "ds_projection": "", "ds_process_way": "\nCE318 solar spectrophotometer is used for this measurement, which can measure the optical thickness of 9 bands, namely 1640nm, 1020nm, 936nm, 870nm, 670nm, 550nm, 440nm, 380nm and 340nm.\n
\nIn Zhangye City, the observation dates are March 30, 2008, March 31, 2008, April 01, 2008 and April 02, 2008. The measuring points are 38 ° 56 ′ 8.9 ″ n, 100 ° 27 ′ 8.3 ″ E and 1400m above sea level. Air pressure: 856, all measurements are made only during the day.\n
\nFactors affecting CE318 data accuracy: local atmospheric pressure, instrument calibration parameters and various conversion factors.\n
\n（ 1) In the process of data preprocessing, the atmospheric pressure is obtained by using the empirical relationship related to elevation, most of which are inconsistent with the reality. In order to obtain accurate inversion results, synchronous meteorological station data are required;\n
\n（ 2) Instrument calibration parameter error requires field calibration or instrument indoor calibration. Outdoor calibration: under the condition of stable atmospheric parameters, obtain the measurement data with atmospheric mass number between 3-7, and calibrate with langly principle. Indoor calibration: standard light source;\n
\n（ 3) In retrieving the aerosol optical thickness of water vapor channel, the water vapor content needs each conversion factor. The conversion factors are empirical parameters, and their practicability needs to be further verified.
", "ds_ref_instruction": "\r\nThis 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", "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": [ "气溶胶", "地面遥感", "气溶胶光学深度", "太阳分光光度计", "大气水汽" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "黑河流域", "张掖市加密观测区", "上游寒区水文试验区" ], "ds_time_tags": [ 2008 ], "ds_contributors": [ { "true_name": "周梦维", "email": "mengweizhou@hotmail.com", "work_for": "中国科学院遥感应用研究所", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "周梦维", "email": "mengweizhou@hotmail.com", "work_for": "中国科学院遥感应用研究所", "country": "中国" } ], "ds_managers": [ { "true_name": "周梦维", "email": "mengweizhou@hotmail.com", "work_for": "中国科学院遥感应用研究所", "country": "中国" } ], "category": "遥感及产品" }