Abstract
A study of TOGA-COARE data used to estimate microphysical cloud information is described. Coincident wideband passive microwave brightness temperature observations from radiometers on both the DC-8 aircraft (/spl sim/11 km altitude) and the ER-2 aircraft (/spl sim/20 km altitude) are used to investigate microphysical cloud profile conditions between the two aircraft. A wideband, nadir-viewed, dual-altitude comparison between TOGA-COARE brightness temperature (T/sub B/) observations and computed brightness temperature values is the basis for the estimation procedure. A flexible radiative transfer model was used to compute wideband, nadir-viewed dual altitude T/sub B/ values for a variety of microphysical cloud conditions. By varying the microphysical cloud parameters (e.g., particle size distributions and the hydrometeor density) and requiring that the comparisons remain consistent with the TOGA-COARE observations, the cloud conditions between the two aircraft can be estimated.
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