Table 4 shows the results for the uncertainty that could be assigned to atmospheric loading for
atmospheres varying between ± one standard deviation of the mean atmosphere for Libya 4. The results show great agreement for all but the SWIR 2, which approached the 3%–4% uncertainty level. This maximum level would represent a change in atmosphere water vapor levels changing from +1 STD
“wet” to −1 STD “dry” over the course of 8 days or vice-versa. While this seems to be an extreme
possibility based on Figure 12, the likelihood of this occurrence is nonzero.