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<br />I <br /> P(t) <br />.' pet) <br />I p. .(t) <br /> 1-J <br />I * <br />Pll (1) <br /> ^ <br />I Pll(l) <br /> b <br />I P22 (t) <br /> Pz <br />I Q <br />I' q <br />I QC <br /> qC(t) <br />I qM(t) <br />I QR <br />qR('t) <br />I QT <br /> qT(t) <br />I q (t) <br /> u <br /> R <br />I l' <br />I T <br /> m <br /> "I" <br /> ~ <br />I t <br /> t+ <br />I t <br />I V <br />I <br /> <br />Matrix of error covariances at time t . <br /> <br />Matrix of first derivatives with respect to time of error <br />covariances at time t. <br /> <br />Covariance of errors of estimation of the ith and jth state <br />variables at time t. <br /> <br />Variance of the error of the optimal estimate of annual mean <br />discharge. <br /> <br />Approximation of the variance of the error of the optimal estimate <br />of annual mean discharge. <br /> <br />Variance of the error of the backward estimate of discharge rate. <br /> <br />Maximum variance of the error of real-time estimates of discharge <br />rate. <br /> <br />Vector of spectral densities of the random variables of the state <br />equation. <br /> <br />Spectral density of a random variable. <br /> <br />Computed total discharge during a year. <br /> <br />Computed discharge rate at time t. <br /> <br />Mmeasured discharge rate at timet . <br /> <br />Rated total discharge during a year. <br /> <br />Rated discharge at time t. <br /> <br />True total discharge during a year. <br /> <br />True instantaneous discharge at time t. <br /> <br />Rated discharge at the CRIR Upper Main Drain. <br /> <br />Covariance matrix of measurement errors. <br /> <br />Variance of measurement error. <br /> <br />Indicator of matrix transposition. <br /> <br />Total cost of operating network. <br /> <br />Time. <br /> <br />Time just after a' discharge measurement. <br /> <br />Time just prior to a discharge measurement. <br /> <br />Total uncertainty in estimates of annual mean discharge at all <br />streamgages in the network. <br />x~ <br />