Remote sensing of water quality from satellite observations needs validation in terms that are readily understandable in the context of human observations. In particular, it is best if the observations are intuitive and thus resonate with lived experience. NASA’s novel solution to this is “Fowler’s Sneaker Depth” – the depth to which a person can still see the tops of their white sneakers when standing in the water.

https://www.nasa.gov/feature/goddard/2017/one-mans-shoes-help-nasa-explain-water-clarity

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