Two-Stage Data-Driven Modeling for Day-Ahead Solar Power Forecasting: A Case Study of the SUT Campus Floating Solar System - Thongwily, Wipada; Junhuathon, Nitikorn; Chayakulkheeree, Keerati (2025 13th International Electrical Engineering Congress (iEECON), Electrical Engineering Congress (iEECON), 2025 13th International, 2025)