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Federal
Clean Air Status and Trends Network (CASTNET): Visibility
U.S. Environmental Protection Agency —
Nephelometer data (conforms to IMPROVE network standards) from October 1993 to June 2002. This table is no longer updated. -
Federal
Photographic Records Showing the Variations of the Virtual Height of Reflection as a Function of the Radio Frequency
National Oceanic and Atmospheric Administration, Department of Commerce —
The standard (analog) ionosonde produces photographic records known as ionograms, which show the variations of the virtual height of reflection as a function of the... -
Federal
Particle and organic vapor emissions from children’s 3-D pen and 3-D printer toys
U.S. Environmental Protection Agency —
The data presented includes the total elemental analysis, via ICP-MS) of aerosol emissions from 3D printer of thermoplastic polymers. This dataset is associated with...