Media are invited to a joint briefing with NASA and The Smithsonian Astrophysical Observatory at 9 a.m. EDT Tuesday, March 14, to discuss the first space-based instrument to observe major air pollutants across North America every hour during the daytime. Media are invited to a joint briefing with NASA and The Smithsonian Astrophysical Observatory at 9 a.m. EDT Tuesday, March 14, to discuss the first space-based instrument to observe major air pollutants across North America every hour during the daytime. Read More