| 摘要 |
PROBLEM TO BE SOLVED: To enable the measurement of the salinity and water temperature of a marine surface layer using data obtained by a marine radar. SOLUTION: A variationΔS' between the effect of waves in a standard time period on received power RSI<SB>0</SB>' and the effect of waves in a measurement time period on received power RSI<SB>m</SB>' is estimated. A variationΔs' between the effect of waves in the standard time period on the received power RSI<SB>0</SB>' and the effect of waves in an electrical conductivity fluctuation time period on received power is estimated. A regression function f(σ) of the relationship between received power, which is obtained by subtracting the variationΔs' from the received power in the electrical conductivity fluctuation time period, and the electrical conductivityσin the electrical conductivity fluctuation time period is estimated. A value of the electrical conductivityσ<SB>c</SB>in the measurement time period is estimated using RSI<SB>0</SB>'-RSI<SB>m</SB>'ΔS'+äf(σ<SB>0</SB>)-f(σ<SB>c</SB>)} (whereσ<SB>0</SB>: the electrical conductivity in the standard time period), and practical salinity is calculated. COPYRIGHT: (C)2011,JPO&INPIT |
