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Collision Threat Parameters for a new Radar Display and Plot Technique

Published online by Cambridge University Press:  23 November 2009

Andrzej S. Lenart
Andrzej S. Lenart
Affiliation:
(Technical University of Gdansk)
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Extract

The paper, an edited and shortened version of the original, discusses a new approach to the display of collision threat parameter areas, obtained as a result of theoretical considerations. It can be applied to radar-computer anti-collision systems as well as manual radar plots.

With the development of digital techniques, and electronic digital computers in particular, radar-computer anti-collision systems are now aboard ships. Digital processing of signals and data in such systems can be divided into three stages as follows:

(a) Primary processing, which includes an analysis of radar signals within one rotation of the radar antenna. A result of this processing would be the position coordinates of detected objects. For relatively simple algorithms and high speed of analysis, special devices are usually employed.

(b) A secondary processing, which includes a correlation of the information obtained in the primary processing stage; the objects' position coordinates in consecutive antenna rotations; and an estimate of position, motion and approach parameters. For secondary processing devices general-purpose mini- and microcomputers are usually applied.

(c) A graphical display of the calculation.

Type
Research Article
Information
The Journal of Navigation , Volume 36 , Issue 3 , September 1983 , pp. 404 - 410
Copyright
Copyright © The Royal Institute of Navigation 1983

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References

REFERENCES

1Garcia-Frias, J. (1965). The sector rule and the collision problem. This Journal, 18, 141.Google Scholar
2Lord, R. N. (1968). A controlled azimuth avoidance manoeuvre. This Journal, 21, 171.Google Scholar
3Mitrofanov, O. I. (1968). An anti-collision indicator. This Journal, 21, 163.Google Scholar
4Mitrofanov, O. I. (1976). Manoeuvres in fog compatible with the collision regulations. This Journal, 29, 39.Google Scholar