## 5 Results and Discussion
### Comparative and Qualitative Analysis
This area exhibits the highest electrical conductivity and ionization due to its proximity to the geomagnetic equator, which is why it consistently shows intense scintillation. This heightened activity can be attributed to the increased ionospheric excitations due to the first solar radiation of the day during a year of high solar activity. The ConvGRU-L\({}_{\rm C}\) model accurately replicated both the spatial distribution and intensity of these disturbances, capturing the core high-intensity areas effectively, although with slight deviations in peripheral zones, suggesting minor underestimations. In contrast, the ConvGRU-L\({}_{\rm log\text{-}cosh}\) model generalized the ionospheric activity, smoothing peak intensities and broadening the impact area, resulting in a less precise depiction of localized high-intensity zones. The ConvGRU-L\({}_{\rm\delta}\) model underperformed, underestimating the intensity and failing to capture the broader scintillation context, which muted the color intensities and reduced spatial accuracy. At solar noon, the scintillation activity decreased from sunrise but still covered significant areas, reflecting the stabilizing effect of sustained solar radiation. The peak activities shifted slightly northward, aligning more closely with the geomagnetic equator. The ConvGRU-L\({}_{\rm C}\) model mirrored this pattern closely, capturing the peak activity with high fidelity but slightly overestimating the spread of lower intensity scintillation towards the east. The ConvGRU-L\({}_{\rm log\text{-}cosh}\) model, while maintaining the general location of peak activity, diffused the high-intensity areas, resulting in a less defined representation of the equatorial anomaly. Conversely, the ConvGRU-L\({}_{\rm\delta}\) model significantly diverged from the observed patterns, underestimating scintillation intensities and failing to depict the detailed spatial extent of these disturbances. Activity at sunset was enhanced again, although not as intense as at sunrise. This resurgence is typical as the ionosphere undergoes rapid changes in response to diminishing solar radiation, reactivating the equatorial anomaly. The ConvGRU-L\({}_{\rm C}\) model provided an accurate representation of these conditions, closely aligning with the observed data, albeit with slightly smoothed intensity transitions. However, the ConvGRU-L\({}_{\rm log\text{-}cosh}\) model broadened the impact zone and diluted the observed peak intensities, leading to a generalized depiction. The ConvGRU-L\({}_{\rm\delta}\) model displayed considerable inaccuracies, with a significant underestimation of both the intensity and the spatial distribution of scintillation, indicating its limited sensitivity to the dynamic sunset conditions. During 2015, ionospheric scintillation was most intense and widespread at sunrise, diminishing towards noon and slightly increasing again by sunset. In 2020, the overall intensity and spread were reduced across all times, correlating with lower solar activity. Compared to 2015, the sunrise map shows reduced scintillation activity, illustrating the lower ionospheric disturbances typical of a solar minimum. The same regions were affected, but the intensity and spread of scintillation were markedly lower. The ConvGRU-L\({}_{\rm C}\) model closely approximates the observed data, capturing the primary scintillation hotspots with remarkable accuracy, though it slightly overestimates peripheral activities. In contrast, the ConvGRU-L\({}_{\rm log-cosh}\) model generalizes the peak intensities, spreading the activity over a wider area with less distinction, which could compromise its utility for precise monitoring. The ConvGRU-L\({}_{\rm S}\) model significantly underestimates both the intensity and spread of activity, displaying a constrained area of influence and muted color intensities. The noon map indicates further reduced activity compared to 2015. The pattern remains over the equatorial region but is less intense and more confined, reflecting the subdued solar activity.