Optical satellites are useless during floods because, well, it’s cloudy. Sentinel-1 SAR sees through rain and night, but its data is noisy, complex, and full of "permanent water" that isn't actually flooding. I built an end-to-end pipeline to turn raw SNAP GeoTIFFs into clean, actionable flood maps. Here’s how I solved the three biggest headaches in SAR processing. 1. The "Padding" Trap SNAP exports often include zero-value borders. If you don’t crop these, your histogram ge...