The navigation grid overprinted on certain small scale navigation and planning charts published by the Defense Mapping Agency was originally intended for use in polar regions by navigators utilizing such techniques as celestial navigation and LORAN-C. The use of grid north gave the navigator a uniform reference direction to use rather than the highly convergent meridians. The concept of a non-changing north is remarkably like that encountered in an inertial navigation system with the local-level platform untorqued (alpha-wander mode). However, the directional angles computed by the inertial navigation system rapidly diverge from those measured from the charts. This paper explores the reason for this divergence and proposes a solution. (Author)
Reconciling the Navigational Grid with the Inertial Navigation System
1987
18 pages
Report
No indication
English
NTIS | 1964
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