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Methods of Plotting and Reduction

Published online by Cambridge University Press:  18 January 2010

Extract

Hitherto it has been the practice to compute the altitude and azimuth of a celestial body either for a D.R. position or a chosen position in the vicinity of the D.R. position and to compare the computed altitude with the observed altitude, the difference (the intercept) being marked off along a line drawn in the direction of the computed azimuth from the position used for computing, either ‘from’ or ‘towards’ the object; a perpendicular drawn at the end of the intercept is the position line of Marcq. St. Hilaire.

Type
Astronomical Navigation in the Air. A Discussion on Methods to Produce Speed and Accuracy
Copyright
Copyright © The Royal Institute of Navigation 1949

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References

* Tables for these corrections are given in A.N.T. and H.O. 249.