Item talk:Q228569

{

 "@context": "http://schema.org/",
 "@type": "WebPage",
 "additionalType": "Activity",
 "url": "https://www.usgs.gov/special-topics/remote-sensing-phenology/science/ndvi-avhrr",
 "headline": "NDVI from AVHRR",
 "datePublished": "November 29, 2018",
 "author": [
   {
     "@type": "Person",
     "name": "Jesslyn Brown",
     "url": "https://www.usgs.gov/staff-profiles/jesslyn-brown",
     "identifier": {
       "@type": "PropertyValue",
       "propertyID": "orcid",
       "value": "0000-0002-9976-1998"
     }
   }
 ],
 "description": [
   {
     "@type": "TextObject",
     "text": "The sensor responsible for the longest running series of NDVI products used for large-area phenology studies is carried aboard National Oceanic and Atmospheric Administration (NOAA) polar-orbiting weather satellites (see Table 1). This sensor, known as the Advanced Very High Resolution Radiometer (AVHRR), has a daily repeat cycle and, despite its name, a 1-km resolution (an AVHRR image pixel represents 1 square km of land surface). AVHRR data are used to generate NDVI-based images of the planet's land surface on a regular basis, thereby creating image series that portray seasonal and annual changes to vegetation worldwide. AVHRR NDVI data are available in a consistently processed database from 1982-present at an 8-km re-sampling grid covering the entire planet, and from 1989-present at a 1-km resolution for the conterminous United States."
   }
 ],
 "funder": {
   "@type": "Organization",
   "name": "Remote Sensing Phenology",
   "url": "https://www.usgs.gov/special-topics/remote-sensing-phenology"
 },
 "about": [
   {
     "@type": "Thing",
     "name": "Methods and Analysis"
   },
   {
     "@type": "Thing",
     "name": "Vegetation Indices"
   },
   {
     "@type": "Thing",
     "name": "Remote Sensing Phenology"
   },
   {
     "@type": "Thing",
     "name": "Information Systems"
   },
   {
     "@type": "Thing",
     "name": "Science Technology"
   },
   {
     "@type": "Thing",
     "name": "Maps and Mapping"
   },
   {
     "@type": "Thing",
     "name": "earth resources observation and science center"
   },
   {
     "@type": "Thing",
     "name": "vegetation indices"
   },
   {
     "@type": "Thing",
     "name": "NDVI"
   },
   {
     "@type": "Thing",
     "name": "Climate"
   },
   {
     "@type": "Thing",
     "name": "Energy"
   },
   {
     "@type": "Thing",
     "name": "Environmental Health"
   },
   {
     "@type": "Thing",
     "name": "Water"
   },
   {
     "@type": "Thing",
     "name": "Geology"
   }
 ]

}