F18 SSMIS daily products (SSMI F18)

These Special Sensor Microwave/Imager (SSM/I) and Special Sensor Microwave Imager Sounder (SSMIS) data products are produced as part of the NASA's Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program. Remote Sensing Systems generates SSM/I and SSMIS data products using a unified, physically based algorithm to simultaneously retrieve the products. This algorithm is a product of 20 years of refinements, improvements, and verifications.nThe daily files consist of over-ocean measurements (geophysical retrievals or parameters) mapped to a regular 0.25-degree grid complete with data gaps between orbits. Two maps exist for each parameter, one of ascending orbit segments and the other of descending orbit segments. Data on each of the segment maps are averaged where successive orbits cross and are overwritten at the seam or region where the last orbit of the day overlaps the first orbit of the day. Daily data files contain time maps consisting of the UTC observation time for each set of passes (ascending and descending).n Gridded data are organized according to observation date. All dates and times are Coordinated Universal Time (UTC), also known as Greenwich Mean Time (GMT), Zulu Time (Z), Universal Time (UT), and World Time. acknowledgement=These SSM/I and SSMIS data are produced by Remote Sensing Systems with support NASA. Data are available at www.remss.com. We are grateful to NOAA for access to SSM/I and SSMIS TDR data. cdm_data_type=Grid contact=[e-mail] Conventions=CF-1.6, COARDS, ACDD-1.3 Easternmost_Easting=179.875 geospatial_lat_max=89.875 geospatial_lat_min=-89.875 geospatial_lat_resolution=0.25 geospatial_lat_units=degrees_north geospatial_lon_max=179.875 geospatial_lon_min=-179.875 geospatial_lon_resolution=0.25 geospatial_lon_units=degrees_east infoUrl=https://cwcgom.aoml.noaa.gov/thredds/dodsC/SSMIS/SSMIS_F18.nc.html institution=NOAA keywords_vocabulary=GCMD Science Keywords nco_openmp_thread_number=1 Northernmost_Northing=89.875 source_data=Remote Sensing Systems sourceUrl=https://cwcgom.aoml.noaa.gov/thredds/dodsC/SSMIS/SSMIS_F18.nc Southernmost_Northing=-89.875 spatial_resolution=0.25 degrees standard_name_vocabulary=CF Standard Name Table v32 temporal_extent=86400.0 temporal_extent_unit=seconds time_coverage_end=2024-12-04T12:00:00Z time_coverage_start=2020-01-01T12:00:00Z Westernmost_Easting=-179.875专用传感器微波成像仪（Special Sensor Microwave/Imager，SSM/I）与专用传感器微波成像仪/探测器（Special Sensor Microwave Imager Sounder，SSMIS）数据产品，是美国国家航空航天局（National Aeronautics and Space Administration，NASA）研究环境用地球系统数据记录制作计划（Making Earth System Data Records for Use in Research Environments，MEaSUREs）的产出成果之一。 遥感系统公司（Remote Sensing Systems）采用统一的物理基础算法，同步反演生成SSM/I与SSMIS数据产品；该算法历经20余年的迭代优化与验证打磨而成。 每日数据文件包含洋面观测数据（地球物理反演结果或参数），被映射至规则的0.25度网格，同时保留轨道间的数据间隙。每个参数对应两幅地图：一幅对应升轨段，另一幅对应降轨段。在相邻轨道交汇区域，分段地图的数据会进行均值合成；而在当日末轨与当日首轨重叠的接缝区域，数据会予以覆盖。 每日数据文件包含时间映射表，记录了每组观测轨道（升轨与降轨）的协调世界时（UTC）观测时刻。 网格化数据按观测日期进行组织，所有日期与时间均采用协调世界时（Coordinated Universal Time，UTC），该时间格式亦被称为格林尼治标准时间（Greenwich Mean Time，GMT）、祖鲁时间（Zulu Time，Z）、世界时（Universal Time，UT）与全球时间。 致谢说明：本SSM/I与SSMIS数据由遥感系统公司（Remote Sensing Systems）在美国国家航空航天局（NASA）的支持下制作完成。数据可通过www.remss.com获取。谨此致谢美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration，NOAA）提供的SSM/I与SSMIS TDR数据访问权限。 cdm_data_type=Grid → 公共数据模型数据类型：Grid contact=[e-mail] → 联系方式：[e-mail] Conventions=CF-1.6, COARDS, ACDD-1.3 → 数据格式规范：CF-1.6、COARDS、ACDD-1.3 Easternmost_Easting=179.875 → 最东东经：179.875 geospatial_lat_max=89.875 → 地理纬度最大值：89.875 geospatial_lat_min=-89.875 → 地理纬度最小值：-89.875 geospatial_lat_resolution=0.25 → 地理纬度分辨率：0.25 geospatial_lat_units=degrees_north → 地理纬度单位：北纬度数 geospatial_lon_max=179.875 → 地理经度最大值：179.875 geospatial_lon_min=-179.875 → 地理经度最小值：-179.875 geospatial_lon_resolution=0.25 → 地理经度分辨率：0.25 geospatial_lon_units=degrees_east → 地理经度单位：东经度数 infoUrl=https://cwcgom.aoml.noaa.gov/thredds/dodsC/SSMIS/SSMIS_F18.nc.html → 信息访问地址：https://cwcgom.aoml.noaa.gov/thredds/dodsC/SSMIS/SSMIS_F18.nc.html institution=NOAA → 所属机构：美国国家海洋和大气管理局（National Oceanic and Atmospheric Administration，NOAA） keywords_vocabulary=GCMD Science Keywords → 关键词词汇表：GCMD科学关键词 nco_openmp_thread_number=1 → NCO OpenMP线程数：1 Northernmost_Northing=89.875 → 最北北纬：89.875 source_data=Remote Sensing Systems → 源数据提供方：遥感系统公司（Remote Sensing Systems） sourceUrl=https://cwcgom.aoml.noaa.gov/thredds/dodsC/SSMIS/SSMIS_F18.nc → 源数据地址：https://cwcgom.aoml.noaa.gov/thredds/dodsC/SSMIS/SSMIS_F18.nc Southernmost_Northing=-89.875 → 最南南纬：-89.875 spatial_resolution=0.25 degrees → 空间分辨率：0.25度 standard_name_vocabulary=CF Standard Name Table v32 → 标准名称词汇表：CF标准名称表v32 temporal_extent=86400.0 → 时间覆盖时长：86400.0 temporal_extent_unit=seconds → 时间时长单位：秒 time_coverage_end=2024-12-04T12:00:00Z → 时间覆盖结束时刻：2024-12-04T12:00:00Z time_coverage_start=2020-01-01T12:00:00Z → 时间覆盖起始时刻：2020-01-01T12:00:00Z Westernmost_Easting=-179.875 → 最西西经：-179.875