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A target location method based on time difference of arrival (TDOA) sequences with a two-transmitter/one-receiver (T2/R) passive radar is presented. After demonstrating the observability of the system, the authors obtain two group nonlinear equations about TDOA in the Cartesian system of co-ordinates. Using measured TDOA data and linearising the equations, the target object is located by solving linear equations with the total least squares method. The performance of this method can approach the Cramer-Rao bound with moderate computational burden. The performance of this location method is analysed together with its geometric dilution of precision.