FILTERING OF DISCONTINUOUS PROCESSES ARISING IN MARINE INTEGRATED NAVIGATION SYSTEMS

Authors
  1. Dabbous, T.E.
  2. Ahmed, N.U.
  3. McMillan, J.C.
  4. Liang, D.F.
Corporate Authors
Ottawa Univ, Ottawa ONT (CAN);Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
In this paper the authors describe a refined stochastic model for the errors of the Loran-C radio navigation aid, and show how this model can be used to improve the performance of integrated navigation systems. In addition to the usual propagation errors, Loran-C time of arrival measurements are occasionally plagued with sudden intermittent errors of a particular magnitude and caused by receiver cycle selection errors. These result in sudden large jumps in the calculated position solution. Standard stochastic models, described by linear Ito differential equations driven by Wiener processes, cannot adequately describe behavior of these cycle selection errors. In this paper the Loran-C error has therefore been modeled as the sum of diffusion process, representing the normal propagation errors, and a pure jump process of Poisson type, representing the cycle selection errors. TRUNCATED
Date of publication
15 Jan 1988
Number of Pages
19
Reprinted from
IEEE Transactions on Aerospace and Electronic Systems, vol 24, no 1, 1988, p 85-101
DSTKIM No
88-03712
CANDIS No
56928
Format(s):
Hardcopy;Originator's fiche received by DSIS

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