The environmental satellites NOAA‐2 and ERTS‐1 observed flooding in United States' rivers such as the Mississippi during 1973. Combination of NOAA‐2 observation frequency and the ERTS‐1 resolution provides an adequate satellite system for monitoring floods. Several polar‐orbiting satellites of the ERTS type could view flooded areas at a reasonably high resolution every three to five days. A high‐resolution Earth‐synchronous satellite would further enhance flood mapping by providing observations whenever clouds are absent.
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Mcginnis et al. (1975) studied this question.
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