VIIRSN, Suomi-NPP, Level-3 SMI, NASA, Global, 4km, K490, R2018, 2012-present, 8-Day

R2018 version of Level-3 Standard Mapped Image (SMI), Global, 4km, Diffuse Attenuation Coefficient K490, 8-Day composite data from the Visible and Infrared Imager/Radiometer Suite (VIIRS), as processed by NASA GSFC Ocean Biology Processing Group (OBPG). VIIRS is a multi-disciplinary instrument that flies on the Suomi-NPP (National Polar-orbiting Partnership) satellite. Suomi-NPP is the initial spacecraft in the JPSS (Joint Polar Satellite Systems) series of spacecraft. JPSS is our Nation's next generation polar-orbiting operational environmental satellite system. JPSS is a collaborative program between NOAA and its acquisition agent NASA. VIIRS is the successor to MODIS for Earth science data product generation. (This version of the VH data was first released on 2017-12-12.)
_lastModified=2022-08-15T00:19:47.000Z
cdm_data_type=Grid
Conventions=CF-1.6, COARDS, ACDD-1.3
Easternmost_Easting=179.9792
geospatial_lat_max=89.97916
geospatial_lat_min=-89.97917
geospatial_lat_resolution=0.04166666589488307
geospatial_lat_units=degrees_north
geospatial_lon_max=179.9792
geospatial_lon_min=-179.9792
geospatial_lon_resolution=0.041666674383609215
geospatial_lon_units=degrees_east
history=SNPP data files are downloaded ASAP from https://oceandata.sci.gsfc.nasa.gov/VIIRS-SNPP/Mapped/8-Day/4km/Kd_490/ to NOAA NMFS SWFSC ERD ([e-mail]).
NOAA NMFS SWFSC ERD ([e-mail]) uses ERDDAP to add the time variable and slightly modify the metadata.
Direct read of HDF4 file through CDM library.
identifier_product_doi=10.5067/NPP/VIIRS/L3M/KD490/2018
identifier_product_doi_authority=https://dx.doi.org
infoUrl=https://oceancolor.gsfc.nasa.gov/data/viirs-snpp/
institution=NASA/GSFC OBPG
instrument=VIIRS
keywords_vocabulary=GCMD Science Keywords
l2_flag_names=ATMFAIL,LAND,HILT,HISATZEN,STRAYLIGHT,CLDICE,COCCOLITH,LOWLW,CHLWARN,CHLFAIL,NAVWARN,MAXAERITER,ATMWARN,HISOLZEN,NAVFAIL,FILTER,HIGLINT
map_projection=Equidistant Cylindrical
measure=Mean
naming_authority=gov.noaa.pfeg.coastwatch
Northernmost_Northing=89.97916
platform=Suomi-NPP
processing_level=L3 Mapped
processing_version=2018.0
project=Ocean Biology Processing Group (NASA/GSFC/OBPG)
sourceUrl=https://oceandata.sci.gsfc.nasa.gov/VIIRS-SNPP/Mapped/8Day/4km/Kd_490/
Southernmost_Northing=-89.97917
spatialResolution=4.64 km
standard_name_vocabulary=CF Standard Name Table v70
temporal_range=8-day
testOutOfDate=now-35days
time_coverage_end=2022-07-24T00:00:00Z
time_coverage_start=2012-01-05T00:00:00Z
Westernmost_Easting=-179.9792

R2018版本的三级标准映射图像（SMI）全球4公里分辨率漫射衰减系数K490，由可见光和红外成像仪/辐射计组件（VIIRS）生成的8日合成数据，经美国宇航局戈达德太空飞行中心海洋生物学处理小组（OBPG）处理。VIIRS是一种多学科仪器，搭载在苏omi-NPP（国家极地轨道伙伴计划）卫星上。苏omi-NPP是该JPSS（联合极地卫星系统）系列航天器的首颗航天器。JPSS是我国下一代极地轨道业务环境卫星系统。JPSS是美国国家海洋和大气管理局（NOAA）及其采购代理美国宇航局（NASA）之间的合作项目。VIIRS是地球科学数据产品生成中继任MODIS的仪器。（此版本的VH数据首次发布于2017年12月12日。）