Item talk:Q227576

{

 "@context": "http://schema.org/",
 "@type": "WebPage",
 "additionalType": "Project",
 "url": "https://www.usgs.gov/centers/eros/science/usgs-eros-archive-landsat-atmospheric-auxiliary-data-merra-2-c2",
 "headline": "USGS EROS Archive - Landsat - Atmospheric Auxiliary Data - MERRA-2 C2",
 "datePublished": "June 28, 2021",
 "author": [],
 "description": [
   {
     "@type": "TextObject",
     "text": "Atmospheric Auxiliary Data \u2013 MERRA-2 C2 Subset Digital Object Identifier number(DOI): /10.5066/P9HI8JTZ"
   },
   {
     "@type": "TextObject",
     "text": "Use EarthExplorer to search and download the MERRA-2 C2 Subset Product. The data are located under the Landsat category, Atmospheric Auxiliary Data, and listed as MERRA-2 C2 Subset."
   },
   {
     "@type": "TextObject",
     "text": "Modern Era Retrospective analysis for Research and Applications Version 2 (MERRA-2) is a NASA atmospheric reanalysis that provides data beginning in 1980. MERRA-2 provides atmospheric data that are used as input to the radiative transfer model used to determine surface temperature."
   },
   {
     "@type": "TextObject",
     "text": "The USGS creates NetCDF files that contain the subset of the MERRA-2 datasets used in ST processing. Each daily global file contains \"H\" height, \"QV\" specific humidity, and \"T\" air temperature values on a grid of 576 longitude, 361 latitude, and 42 pressure levels, for 8 times within the day (every 3 hours). The axis values are recorded in the \"lat\", \"lon\", \"lev\", and \"time\" datasets, respectively. The new files are in the same format and spatio-temporal resolution as the original MERRA-2 or GEOS-5 FP-IT files"
   },
   {
     "@type": "TextObject",
     "text": "Back to Products Overview"
   },
   {
     "@type": "TextObject",
     "text": "The USGS uses either MERRA-2 or GEOS-5 FP-IT data for Surface Temperature processing.MERRA-2 data are used in the ST algorithm for Landsat 4-7 data for global products when GEOS-5 FP-IT data is not available (prior to 2000)."
   },
   {
     "@type": "TextObject",
     "text": "These data are available for users wanting to generate custom Level-2 products using the Collection 2 surface reflectance and surface temperature algorithms. It is not necessary for users to download the atmospheric auxiliary data for use with Collection 2 Level-2 products."
   }
 ],
 "funder": {
   "@type": "Organization",
   "name": "Earth Resources Observation and Science (EROS) Center",
   "url": "https://www.usgs.gov/centers/eros"
 },
 "about": [
   {
     "@type": "Thing",
     "name": "Environmental Health"
   },
   {
     "@type": "Thing",
     "name": "Science Technology"
   },
   {
     "@type": "Thing",
     "name": "Products and Datasets"
   },
   {
     "@type": "Thing",
     "name": "Landsat"
   },
   {
     "@type": "Thing",
     "name": "Remote Sensing"
   },
   {
     "@type": "Thing",
     "name": "Water"
   },
   {
     "@type": "Thing",
     "name": "Energy"
   },
   {
     "@type": "Thing",
     "name": "Maps and Mapping"
   },
   {
     "@type": "Thing",
     "name": "Remote Sensing Research and Development"
   },
   {
     "@type": "Thing",
     "name": "Geology"
   },
   {
     "@type": "Thing",
     "name": "Methods and Analysis"
   },
   {
     "@type": "Thing",
     "name": "MERRA-2"
   },
   {
     "@type": "Thing",
     "name": "Information Systems"
   },
   {
     "@type": "Thing",
     "name": "Landsat Atmospheric Auxiliary"
   }
 ]

}