A timing estimator of an OQPSK demodulator is provided. The mutual engagement of rocking restricting portions 31 and 41 that are provided on the side edge portion 21b of the frame 21 and the arm portion 35 restricts displacement of the arm portion 35 in relation to the side edge portion 21b of the frame 21 in a direction orthogonal to the length direction of the side edge portion 21b. A photogrammetric media processing engine automatically extracts virtual sensor and geometric models from imagery.