Advection and radiation fog comparison at São Paulo highway sites - Gonçalves, Fábio Luiz Teixeira; Herckes, P; Vasconcellos, Pérola de Castro; Bauer, H; Censon, Vitor K; Avila, S. G; Collett Jr., J. L (Conference on Fog, Fog Collection and Dew, 2013)