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Errors of a Simple Doppler Computer due to the Spheroidal Form of the Earth

Published online by Cambridge University Press:  18 January 2010

J. E. D. Williams
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Doppler-operated computers which perform plane D.R. navigation are currently offered to the airlines. A datum track and distance to go are set; from the time of selecting ON, the computer resolves small elements of distance run (input doppler and heading reference) as follows:

Change in across-track dist. = element of dist. run × sin (actual tr. − set tr.)

Change in along-track dist. = element of dist. run × cos (actual tr. − set tr.)

These relations are true for a plane Earth.

Type
Forum
Information
The Journal of Navigation , Volume 13 , Issue 3 , July 1960 , pp. 343 - 345
Copyright
Copyright © The Royal Institute of Navigation 1960