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Question:

What are U.S. Landsat Analysis Ready Data (ARD)?

Answer:

U.S. Landsat Analysis Ready Data (ARD) are products that make the Landsat archive more accessible, easier to analyze, and reduce the amount of time users spend on data processing for time series analysis.

U.S. Landsat Analysis Ready Data (ARD) products are consistently processed to the highest scientific standards and level of processing required for direct use in monitoring and assessing landscape change. U.S. Landsat ARD are derived from Landsat Collection 1 Level-1 precision and terrain-corrected scenes.

U.S. Landsat ARD are currently available for the conterminous United States (CONUS), Alaska and Hawaii for 1982- present, using the following Landsat Collection 1 Level-1 products as input: 

  • Landsat 8 Operational Land Imager (OLI)/Thermal Infrared Sensor (TIRS) Tier 1, Tier 2
  • Landsat 7 Enhanced Thematic Mapper Plus (ETM+) Tier 1
  • Landsat 4-5 Thematic Mapper (TM) Tier 1

Global Landsat ARD specifications are being developed and will be announced when finalized.

Each U.S. Landsat ARD tile consists of the following products:

  • Top of atmosphere (TA) reflectance
  • Top of atmosphere brightness temperature (BT)
  • Surface reflectance (SR)
  • Provisional Surface temperature (ST)
  • Pixel quality assessment (QA)

Data product information and processing details, packaging specifications, and documentation can be found on the U.S. Landsat ARD web page.