本数据集进行去云处理的原始MODIS积雪数据产品来源于由美国国家雪冰数据中心（NSIDC）处理的MOD10A1产品，这一数据集为hdf格式，采用sinusoidal投影。数据集为逐日文件，从2000年2月24日到2015年12月31日。每个文件为当日的积雪面积比例结果，数值为0-100（%），为ENVI标准文件，命名规则为：YYYYddd_FSC_0.5km.img，其中YYYY代表年，ddd代表儒略日（001-365/366）。文件可直接用ENVI或者ARCMAP等软件打开察看。
", "ds_source": "数据格式：ENVI标准格式。文件命名规则：“YYYYddd”+“_FSC_0.5km”+“.img”，其中YYYY代表年，ddd代表儒略日（001-365/366），其中“.img”是为了方便在ARCMAP等软件打开察看而添加的文件后缀。例如2000055_FSC_0.5km.img代表2000年第55天的结果。其中该数据集的ENVI文件是由头文件和主体内容构成。头文件包括行数、列数、波段数、文件类型、数据类型、数据记录格式、和投影信息等；以2000055_FSC_0.5km.img 文件为例。
", "ds_process_way": "青藏高原逐日无云MODIS积雪面积比例数据集（2000-2015年）是在MODIS逐日积雪产品—MOD10A1的基础上，采用一种基于三次样条函数插值的去云算法进行去云处理后得到。进行去云处理的原始MODIS积雪数据产品来源于由美国国家雪冰数据中心（NSIDC）处理的MOD10A1产品，这一数据集为hdf格式，采用sinusoidal投影。
", "ds_quality": "数据质量良好。
", "ds_acq_start_time": "2000-01-01 00:00:00", "ds_acq_end_time": "2015-01-01 00:00:00", "ds_acq_place": "青藏高原", "ds_acq_lon_east": 106.25, "ds_acq_lat_south": 25.0, "ds_acq_lon_west": 72.75, "ds_acq_lat_north": 40.86666666666667, "ds_acq_alt_low": null, "ds_acq_alt_high": null, "ds_share_type": "login-access", "ds_total_size": 18703788363, "ds_files_count": 22, "ds_format": "ASCII", "ds_space_res": "500", "ds_time_res": "日", "ds_coordinate": "WGS84", "ds_projection": "UTM", "ds_thumbnail": "ef4dc3e6-d6d8-4f26-ab2b-e8ebe9b94a68.png", "ds_thumb_from": 0, "ds_ref_way": "", "paper_ref_way": "", "ds_ref_instruction": "None", "ds_from_station": null, "organization_id": "52b7b79b-860c-49a5-9083-9a70cf8bed5a", "ds_serv_man": "敏玉芳", "ds_serv_phone": "0931-4967596 ", "ds_serv_mail": "ncdc@lzb.ac.cn", "doi_value": "", "subject_codes": [ "170.4510" ], "quality_level": 3, "publish_time": "2021-07-05 15:11:28", "last_updated": "2025-04-23 09:47:27", "protected": false, "protected_to": null, "lang": "zh", "cstr": "11738.11.ncdc.NIEER.2021.1970", "i18n": { "en": { "title": "Daily Cloud-Free MODIS Snow Cover Fraction Dataset for the Tibetan Plateau (2000-2015)", "ds_format": "ASCII", "ds_source": "Data format: ENVI standard format. File naming rule: “YYYYddd ‘+’_FSC_0.5km ‘+’.img”, where YYYY stands for year and ddd stands for Julian day (“001-365/366”). 001-365/366), of which “.img” is a file suffix added to facilitate the opening of ARCMAP and other software to view. For example, 2000055_FSC_0.5km.img represents the results for day 55 of 2000. The ENVI file for this dataset consists of a header file and a body. The header file includes the number of rows, columns, bands, file type, data type, data record format, and projection information; for example, the file 2000055_FSC_0.5km.img.
", "ds_quality": "Data quality is good.
", "ds_ref_way": "", "ds_abstract": "The original MODIS snowpack data product for which this dataset was de-clouded was derived from the MOD10A1 product processed by the National Snow and Ice Data Center (NSIDC); this dataset is in hdf format with sinusoidal projection. The dataset is a day-by-day file, from February 24, 2000 to December 31, 2015. Each file is the result of the proportion of snow area on that day, with values from 0-100 (%), and is an ENVI standard file with the naming convention: yyyyddd_FSC_0.5km.img, where yyyy stands for the year and ddd stands for the Julian day (001-365/366). The file can be opened directly by ENVI or ARCMAP software.
", "ds_time_res": "日", "ds_acq_place": "Qinghai-Tibetan plateau", "ds_space_res": "500", "ds_projection": "UTM", "ds_process_way": "The Tibetan Plateau day-by-day cloud-free MODIS snow area ratio dataset (2000-2015) is based on the MODIS day-by-day snow product, MOD10A1, and is de-clouded using a de-clouded algorithm based on cubic spline interpolation. The original MODIS snowpack data product that was de-clouded was derived from the MOD10A1 product processed by the U.S. National Snow and Ice Data Center (NSIDC), and this dataset is in hdf format with sinusoidal projection.
", "ds_ref_instruction": "None" } }, "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, "ds_topic_tags": [ "MODIS", "积雪面积比例", "积雪" ], "ds_subject_tags": [ "自然地理学" ], "ds_class_tags": [], "ds_locus_tags": [ "青藏高原" ], "ds_time_tags": [ 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 ], "ds_contributors": [ { "true_name": "唐志光", "email": "tangzhg11@lzb.ac.cn", "work_for": "湖南科技大学资源环境与安全工程学院", "country": "中国" } ], "ds_meta_authors": [ { "true_name": "唐志光", "email": "tangzhg11@lzb.ac.cn", "work_for": "湖南科技大学资源环境与安全工程学院", "country": "中国" } ], "ds_managers": [ { "true_name": "唐志光", "email": "tangzhg11@lzb.ac.cn", "work_for": "湖南科技大学资源环境与安全工程学院", "country": "中国" } ], "category": "遥感及产品" }