Gasso, S, Hegg, DA (1998). Comparison of columnar aerosol optical properties measured by the MODIS airborne simulator with in situ measurements: A case study. REMOTE SENSING OF ENVIRONMENT, 66(2), 138-152.
Airborne in situ and airborne remote sensing methods are used to measure the aerosol optical properties of a biomass burning plume which extended over the ocean during the Sulfate, clouds And Radiation (SCAR) field experiment in the summer of 1994. The University of Washington Convair C131 in situ instrumentation directly measured aerosol characteristics such as size distribution and scattering coefficient at a particular altitude and also measured the optical depth below the aircraft by a lidar instrument mounted on the plane. Almost simultaneously with the C131 pass, radiances were measured by the MODIS Airborne Simulator mounted in the ER-2 NASA aircraft and used to compute optical depths and particle size distribution parameters. These were compared with the same measurements taken by the in situ platform. The effective radii derived by the MAS retrieval algorithm (0.06-0.08 mu m) are consistently smaller than those from the in situ samples taken in this study (0.10-0.14 mu m). The comparison of MAS optical depths and lidar optical depths measured from the in situ platform indicates that the MAS optical depths agree within the range 0.4