Lt.(j.g.) Andrew P. Seaman (seated) and Cdr. John Adler of NOAA Research's
Earth System Research Laboratory, look at how aerosol particle detecting Laser
Imaging Detection and Ranging (LIDAR) works at the Global Monitoring Division
atop the NOAA facility in Boulder, Colorado. The LIDAR reflects off pollutants
in the atmosphere and reveals their concentration at different altitudes.