*3.3. Seasonal Evaluation of SM2RAIN-CCI and SM2RAIN-ASCAT*

SM2RAIN-CCI and SM2RAIN-ASCAT are compared during four seasons, i.e., pre-monsoon from April to June (A-M-J), monsoon from July to September (J-A-S), post-monsoon from October to November (O-N), and winter from December to March (D-J-F-M) [47,67] for a common period of 2007–2015. Table 4 shows the statistical evaluation of SM2RAIN-CCI in four seasons across Pakistan. The analysis shows poor performance of the precipitation products with an increase in precipitation magnitude and intensity, i.e., monsoon and pre-monsoon seasons. Table 4 shows higher KGE scores in winter season with maximum and minimum values of 0.75 and 0.49, depicting better performance in winter while poor performance in monsoon season (KGE scores ranged between 0.53 (maximum) to 0.19 (minimum)). Similarly, lower biases, ubRMSE, and Theil's U values were observed in winter and post-monsoon seasons. It is concluded from the results that SM2RAIN-CCI shows higher performance in winter followed by post-monsoon season.


**Table 4.** Seasonal evaluation of SM2RAIN-CCI across Pakistan during 2007-2015.

Table 5 represents the seasonal evaluation of SM2RAIN-ASCAT. SM2RAIN-ASCAT also depicts poor performance in heavy and intense precipitation seasons such as the monsoon and pre-monsoon. Lowest biases and ubRMSE values are observed during the winter season. Theil's U also depicts better performance of SM2RAIN-ASCAT during the winter and post-monsoon seasons. Moreover, similar to SM2RAIN-CCI, the highest KGE scores are observed in winter and post-monsoon seasons while the lowest score in the monsoon season, depicting better performance during low precipitation seasons. Overall, high performances are depicted in winter and post-monsoon seasons. However, SM2RAIN-ASCAT outperformed SM2RAIN-CCI in all four seasons.
