{
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  "item": "Apparent_Reflectance.rft.json",
  "itemType": "file",
  "owner": "esri_en",
  "uploaded": 1542247793000,
  "modified": 1542247793000,
  "guid": null,
  "name": null,
  "title": "Apparent Reflectance",
  "type": "Raster function template",
  "typeKeywords": [
    "ArcGIS Raster Function Templates",
    "categoryName#CorrectionSystem_RFT",
    "Function Template",
    "Functions",
    "Processing",
    "Raster",
    "rft",
    "sourceId#Apparent ReflectanceSystem_RFT",
    "Templates"
  ],
  "description": "This function adjusts image brightness digital number (DN) values for some satellite sensors. The adjustments are based on sun elevation, acquisition date, and sensor properties to set the gain and bias for each band. This function is used to adjust reflectance, or brightness, values of some satellite imagery based on the scene illumination and sensor-gain settings. The images are adjusted to a theoretically common illumination condition, so there should be less variation between scenes from different dates and different sensors. This can be useful for image classification, color balancing, and mosaicking. This function can only be used with specific imagery. The applicable sensors are Landsat MSS, Landsat TM, Landsat ETM+, Landsat 8, IKONOS, QuickBird, GeoEye-1, RapidEye, DMCii, WorldView-1, WorldView-2, SPOT 6, and Pleiades.<div><br />The function performs two corrections. The first is based on the gain settings. The original brightness values are re-created from the image values by reversing the gain equations. The second correction has to do with differences in sun angle and brightness. The original brightness values are adjusted to a common lighting condition by normalizing scenes captured under variable illumination conditions. In general, while the output image data type is the same as the input image data type, the output values are lower than the input values and are clipped to the valid data range.<\/div>",
  "tags": [
    "System Raster Function",
    "Raster Function Template",
    "Correction",
    "Apparent Reflectance"
  ],
  "snippet": "Converts raw imagery into Top of Atmosphere values by taking into account sensor characteristics, the position of the sun, and the acquisition time.",
  "thumbnail": "thumbnail/ApparentReflectance.png",
  "documentation": null,
  "extent": [],
  "categories": [],
  "lastModified": -1,
  "spatialReference": null,
  "accessInformation": "Esri, Inc.",
  "licenseInfo": "This raster function template may be used to process your imagery using ArcGIS Image Server.",
  "culture": "english (united states)",
  "properties": null,
  "url": null,
  "proxyFilter": null,
  "access": "public",
  "size": 2577,
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  "industries": [],
  "languages": [],
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