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We urge users of any scientific data to carefully interpret the data, including the data presented in the figures and tables on this website, so that one does not draw erroneous conclusions.  The overall uncertainty associated with the data is a combination of uncertainties associated with the instrument and those introduced during the creation of the data product, which is a multi-step and sometimes imperfect process that may lead to inaccurate data for some areas (e.g., Duncan et al., 2014). In addition, for many places in the world, there are few, if any, independent observations with which to evaluate the satellite data.

Data discovery, visualization, and analysis resources for the end-user.

EOSDIS Earth Observing System Data and Information System.  Useful web tools are available to search data files by instrument and pollutant type.
Land Atmosphere Near-real-time Capability for EOS is NASA’s main tool for visualization and download of near-real-time data and imagery.
Earthdata Search Search, access and download data files, with spatial and temporal sub-setting.
GES DISC Goddard Earth Sciences Data and Information Services Center.
A NASA data center where pollution and aerosol files may be found.
GES DISC/ Giovanni An interactive visualization and analysis web tool.
Search for datasets and data files by time, space, and keywords.
LaRC ASDC Langley Research Center Atmospheric Science Data Center.
A NASA data center where pollution and aerosol files may be found.
LAADS Web Level 1 and Atmosphere Archive and Distribution System.  Access MODIS L1, Atmosphere and Land products, and VIIRS L1 and Land products.
True color imagery and Smoke
Worldview An interactive visualization and analysis web tool.
HMS NOAA Hazard Mapping System Fire and Smoke Product.
Access near-real-time data.
Fire Information for Resource Management System.
Access near-real-time data.
Application Specific
IDEA NOAA Infusing Satellite Data into Environmental Applications.  Near-real-time access to MODIS and GOES aerosol products and meteorological information.
IMAPP NOAA IDEA-I International MODIS/AIRS Processing Package. A software package that uses either Terra or Aqua MODIS AOD to identify areas of high aerosol loading, with which 48-hr forward trajectories are initialized.
RSIG EPA Remote Sensing Information Gateway. Facilitates comparisons between NASA imagery and CMAQ model output.
EO Browser ESA EO Browser. Facilitates visualizing TROPOMI data.

*There are web tools that provide access to multiple parameters relevant to AQ (e.g., aerosols and gases), data files, and visualizations, and in some cases other features, such as temporal and spatial sub-setting of the data, and limited data analysis