TY - JOUR A1 - Brady, J M A1 - Stokes, M D A1 - Bonnardel, J A1 - Bertram, T H T1 - Characterization of a quadrotor unmanned aircraft system for aerosol-particle-concentration measurements. Y1 - 2016/02/2 N1 - R835139 JF - ENVIRONMENTAL SCIENCE & TECHNOLOGY J1 - ENVIRON SCI TECHNOL J2 - ENVIRONMENTAL SCIENCE & TECHNOLOGY J3 - Enviornmenal Research VL - 50 IS - 3 SP - 1376 EP - 1383 ER -