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Search, preview, clip and download SWOT satellite hydrology data (rivers, lakes, reservoirs, ocean). Search, preview, clip and download NASA SWOT satellite water data for rivers, lakes and reservoirs, right in your browser. Description: SWOT Explorer brings NASA's SWOT satellite data into your browser. Find water level and extent data for any river, lake or reservoir on Earth, check it on a map, keep only your study area, and download it, without writing code or digging through data portals. SWOT (Surface Water and Ocean Topography) is a NASA/CNES satellite that measures the height of the world's surface water. Its data is powerful but hard to reach: dozens of products, huge files, and complex search tools. SWOT Explorer makes it simple. WHAT YOU CAN DO • Draw your study area: draw a box or polygon on the map, or upload a shapefile. • Search every SWOT product: river reaches and nodes, lakes, pixel clouds, rasters and ocean sea surface height, filtered by date and pass. • Preview before you download: see each satellite pass on the map with quality colours, so you only download what you need. • Clip to your area: download only the rivers and lakes inside your study area, not whole global files. • Plot water level time series: build water level charts for any river reach or lake in seconds, then export them as CSV or as a ready-to-use figure. • Get reliable reservoir levels: robust processing removes bad observations and outliers, and grades how reliable each series is. • Compare connected reservoirs: plot a chain of dams on one time axis to see how water moves through a river system. • Check against other sources: compare SWOT with DAHITI and Hydroweb altimetry, or with your own gauge readings (paste them or load an Excel file). • Get new-pass alerts: watch a site and get a notification when the satellite delivers new data. • Download reliably: a background queue handles large downloads with pause, resume and retry, or export a download script for Bash or PowerShell. • Save your searches: rerun any search later from your history. WHY INSTALL IT • Saves hours: everything happens in one side panel instead of several NASA portals and scripts. • Built for hydrologists, researchers, students and water managers. • Quality first: quality flags are shown clearly, and unreliable data is labelled instead of hidden. • Private by design: your Earthdata password goes only to NASA, once, to get an access token. The token stays on your computer. The extension has no servers, no tracking and no ads.