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    Federal
DELIVER Psychoacoustic Test (WGA-I) Database
National Aeronautics and Space Administration —
This test was concerned with collecting human annoyance responses to commercially available small unmanned aerial systems (sUAS), as well as common road vehicles. It... - 
  
    Federal
ABoVE: Passive Microwave-derived Annual Snow Melt Duration Date Maps, 1988-2018
National Aeronautics and Space Administration —
This dataset provides the annual period of snowpack melting (i.e., snow melt duration, SMD) across northwest Canada; Alaska, U.S.; and parts of far eastern Russia at... - 
  
    Federal
NACP MCI: Tower Atmospheric CO2 Concentrations, Upper Midwest Region, USA, 2007-2009
National Aeronautics and Space Administration —
This data set provides high precision and high accuracy atmospheric CO2 data from seven instrumented communication towers located in the U.S. Upper Midwest. The... - 
  
    Federal
LBA-ECO CD-02 Carbon and Oxygen Isotopes in Atmospheric CO2 in the Amazon: 1999-2004
National Aeronautics and Space Administration —
This data set reports carbon and oxygen stable isotope ratios of atmospheric carbon dioxide (CO2) collected at several forest and pasture sites and in the free...