Water quality measuring method, water quality measuring device, and water quality measuring program for marine surface layers
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United States of America Patent
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Sep 23, 2014
Grant Date -
Mar 29, 2012
app pub date -
Jun 16, 2010
filing date -
Jun 22, 2009
priority date (Note) -
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Abstract
To measure salinity and water temperature in a marine surface layer using data obtained by a marine radar, a deviation ΔS' between effect of an ocean wave on received power RSI0′ in a reference time zone and effect of the ocean wave on received power RSIm′ in a measurement time zone is estimated, a deviation Δs′ between effect of the ocean wave on the received power RSI0′ in the reference time zone and effect of the ocean wave on the received power in an electrical conductivity variable time zone is estimated, a regression function f(σ) of a relationship between received power obtained by subtracting the deviation Δs′ from the received power in the electrical conductivity variable time zone and electrical conductivity σ in the electrical conductivity variable time zone is estimated, and a value of electrical conductivity σc in a measurement time zone is estimated, thereby calculating practical salinity.
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