Fig. 4. Temporal mean and standard deviation images of the 85-GHz vertically polarized SSM/I channel. These were generated using 44 descending single-pass images corresponding to days 245–264 of 1992. The left panel is the mean image, and the right panel is the standard deviation image. The boxes define two 2 2 subregions used later in the assessment of algorithm effectiveness. One is an example of a cloudy region, and the other is a region with little or no distortion. The band in the lower-right area of the standard deviation image results from atmospheric distortions affecting only some passes.
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