The new air-pollution sensor will sit on a telecommunication satellite operated by U.S. company Intelsat.
, orbiting our planet at an altitude of 600 miles or less. But these satellites, although they circle Earth up to 15 times a day, only get a view of the same region about once a day, which is not enough to understand how air pollution concentrations change within a single day.
"These orbiters go over a particular place on Earth, usually at the same time of day," Caroline Nowlan, an atmospheric physicist at the Center for Astrophysics at Harvard & Smithsonian and TEMPO science team member, said during a NASA news conference on Tuesday ."So every day, we can get measurements, say, over New York City at 1:30 in the afternoon. But that's just one data point over New York over a day, and a lot is happening in New York City over a day.
"Nitrogen dioxide is a byproduct of combustion," Barry Lefer, the tropospheric composition program manager at NASA, said in the same news conference."So when we're burning gasoline, or diesel fuel to move ourselves around, or electric generation plants burning coal or natural gas, a byproduct of that activity is nitrogen dioxide, and it's harmful to human health.
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