^{Suggestions for future work/collaborations}

^{1) CV-580. There is a need to check the results against those from the CV-580/other boundary layer aircraft. Of particular importance are the aerosol size distributions and the derived optical parameters. We have no instrumentation for measuring humidification factors.}

^{2) MODIS/MODIS simulator. We have a number of in-situ size distributions and derived optical depths that should be used to assess the accuracy of the MODIS retrievals. The radiative effect in both the short-wave and terrestrial spectra has been measured by C-130 instruments.}

^{3) MOPPITT. We measured many chemical compounds including O3, CO, NO, NOx. Vertical profiles are readily available on the web-site.}

^{4) Sun-photometers. Early results are very encouraging, particularly the comparison between the aircraft in-situ measurements and the Dubovik inversion. Size distributions, single scattering albedos, and real and imaginary parts of the refractive index are all in excellent agreement.}

^{For further details and to access the data, follow the link from:} http://www.mrfnet.demon.co.uk/africa/africa.html