Although it is unusual for any article published in ‘Measurement + Control’ to be reprinted, a request for just such an action was recently received. Several experts have since been consulted and, at their unanimous insistence, this article — which first appeared in our December 1980 issue — is being put once again before our readers. And to help set today's scene, a personal letter to the Editor from one of our experts is also reproduced on the page opposite.
References
1.
WienerN, 1949, The interpolation and smoothing of stationary time series, MIT Press, Cambridge, Mass, USA.
2.
KalmanR E, 1960, ‘A new approach to linear filtering and prediction problems’, Trans ASME, 82D, 35.
