How well do state-of-the-art techniques measuring the vertical profile of tropospheric aerosol extinction compare?

Schmid, B., R.A. Ferrare, C. Flynn, R. Elleman, D. Covert, A. Strawa, E. Welton, D. Turner, H.H. Jonsson, J. Redemann, J. Eilers, K. Ricci, G. Hallar, M. Clayton, J. Michalsky, A. Smirnov, B.N. Holben, and J. Barnard (2006), How well do state-of-the-art techniques measuring the vertical profile of tropospheric aerosol extinction compare?, J. Geophys. Res., 111.