What is the best source for satellite-derived flood extent map over the Lower Mekong Basin?

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Gáspár Albert

Landsat images are free to download! For this time period Landsat 5 and 7 are useful sources; register on Earth Explorer (USGS) and download the images in georeferenced tiff-format from those periods, when you know about flood occurrence, then observe the flood, and analyse the images in a GIS!

Emmanuel V Murray

Landsat Images.