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Misalignment Angle and Calibration of a Two-component Electromagnetic Log

Published online by Cambridge University Press:  23 November 2009

M. J. R. Fasham
M. J. R. Fasham
Affiliation:
(Institute of Oceanographic Sciences)
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Abstract

A simple method is described for estimating the angle of misalignment of a two-component electromagnetic log, using the covariance properties of the measured components when a ship is steered in a constant cross wind at a number of different speeds. It is shown that, with the present accuracy of radar fixing, allowing for misalignment has a very small effect on the determination of sensitivities for an absolute calibration. However the effect of misalignment is important when cross-calibrating the athwartships components of two electromagnetic logs.

Information

Type
Research Article
Information
The Journal of Navigation , Volume 29 , Issue 1 , January 1976 , pp. 76 - 81
Copyright
Copyright © The Royal Institute of Navigation 1976

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References

REFERENCES

1Tucker, M. J., Smith, N. D., Pierce, F. E. and Collins, F. P. (1970). A two-component electromagnetic ship's log. This Journal, 23, 302–316.Google Scholar
2Fasham, M. J. R. (1970). The use of a shipborne computer for navigation. In Electronic Engineering in Ocean Technology (ed. by Tucker, D. G.) I.E.R.E. Conference Proceedings No. 19, pp. 259–270.Google Scholar
3Crease, J. (1971). Experience with a computer in oceanographic research at sea. This Journal, 24, 294–299.Google Scholar
4Howe, G. L. (1973). Surface currents derived from ship's navigational system. MODE Hot Line News, No. 33, 3.Google Scholar
5Rao, C. R. (1965). Linear Statistical Inference and its Applications. J. Wiley and Sons, New York.Google Scholar