Ever wondered how floods are monitored across the world? Very often we might think that there is someone regularly monitoring the flood extents when a calamity strikes, and when relief efforts are in full swing. This is based on our assumption that with the advent of satellite remote sensing, including optical and synthetic radar satellites, it gives us the capability to map flood events on an unprecedented spatial scale. However, even with such advancement of technology, we still cannot predict which places might be flooded on any given day. This in turn always results in an inadequate temporal sampling of flood extents since these traditional satellites do not cover the entire world at any given time. We have come up with a methodology to map inundation periodically which makes use of novel reflected GPS signals that are available daily on a near-global scale.
The paper can be found here: https://www.mdpi.com/2072-4292/12/18/3026/htm
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