1. National Center for Atmospheric Research; Boulder Colorado USA
2. Energy and Environmental Systems; North Carolina A&T State University; Greensboro North Carolina USA
3. NOAA ISET Center; North Carolina A&T State University; Greensboro North Carolina USA
4. Chemical Sciences Division, ESRL; NOAA; Boulder Colorado USA
5. Department of Physics; North Carolina A&T State University; Greensboro North Carolina USA