Abstract
This paper describes the method and the results of flight experiments carried out for calibrating a radar used for air traffic control by using GPS. Two GPS sensors, i.e., one equipped on an aircraft and another installed at the control tower of Kushiro airport, were used for the experiments. Offline DGPS data processing was carried out for improving the positioning accuracy. The tracks of the aircraft were observed by the radar and by the airborne GPS sensor. Two tracks were compared with each other in order to estimate the biases in the range and azimuth measurement systems of the radar. The biases were estimated on the basis of the least squares method. Reconstructed radar tracks based on the estimated biases were in good agreement with those of DGPS/GPS after compensating the biases.
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