SOME PRACTICAL APPLICATIONS IN FLYING THE WESTERN AND CENTRAL PACIFIC JETSTREAMS

John G. Cronin

Peer Reviewed

Abstract:	IN OPTIMUM flight planning, it is necessary to lay out a minimum time track between two points by means of the time front method. The path thus established is dependent upon the rate of change laterally of tailwind or headwind, and therefore is dependent on the gradients depicted on the chart being used for planning. Over ocean areas where little upper air information is available, maximum gradients such as those associated with jetstream velocity winds may easily be misplaced, not only in forecast patterns, but in synoptic patterns as well. Over areas having fairly dense upper air observational networks which insure quite accurate placing of gradients, the forecast locations of maximum time tracks, especially in cases where the wind flow pattern is parallel to the direction of flight for long distances, is subject to the errors of forecasting and analysis.
Published in:	NAVIGATION: Journal of the Institute of Navigation, Volume 6, Number 4
Pages:	217 - 233
Cite this article:	Cronin, John G., "SOME PRACTICAL APPLICATIONS IN FLYING THE WESTERN AND CENTRAL PACIFIC JETSTREAMS", NAVIGATION: Journal of The Institute of Navigation, Vol. 6, No. 4, 1958-1959, pp. 217-233.
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