Abstract
The velocities of pulsars can be obtained using two methods, one based upon angular proper motion measurements, the other upon the measurement of the velocity of the interstellar scintillation pattern of the pulsar radiation. The first method is more accurate but requires a long series of precise observations using a high-resolution radio interferometer, while the second can be carried out using a single telescope for perhaps an hour and can be applied to large numbers of pulsars. New pulsar proper motion determinations using MERLIN now permit an assessment of the accuracy of the scintillation measurements. We find large systematic differences, up to a factor of 5, between the velocities determined by the two methods
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