Instructions for Aerological Observers (Classic Reprint) - Couverture souple

Gregg, W. R.

Couverture souple

ISBN 10 : 0282829253 ISBN 13 : 9780282829254

Editeur : Forgotten Books, 2019

Synopsis

Excerpt from Instructions for Aerological Observers

The value of free-air data is now universally recognized. Until a comparatively recent date these data were used very largely in studies whose purpose was to add to our knowledge of the characteristics of the free air in relation to latitude, topography, and different conditions of weather at the earth's surface. At some places monthly, seasonal, annual, and, to a less extent, diurnal values have been fairly well determined to considerable alti tudes, and some important conclusions as to the changes in free-air conditions accompanying marked changes in those at the surface have likewise been reached. In general, however, it can truthfully be said that aero logical investigations are still in what may be called the pioneer stage. Immense expansion of the work is necessary before our knowledge of free-air conditions is at all comparable to that of surface conditions. And even the latter is as yet far from complete, for most parts of the earth.

During the past few years the practical application of free-air data has come very decidedly to the front. For this the World War and the rapid development of avia tion are largely . Average values, though constituting important information, are no longer suffi cient. It is now necessary to know the current condi tions. Densities are required in ballistics, and wind di rection and force in both ballistics and aviation. More over, free - air and surface conditions are so closely related that a study of the two, observed simultaneously and over widely distributed areas, can not fail to increase the accuracy of forecasts, not only of conditions in the higher strata, but of surface weather as well. It becomes there fore increasingly important that this work be developed as rapidly and as thoroughly as possible.

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Détails de l'édition

• Éditeur: Forgotten Books
• Date d'édition: 2019
• Langue: anglais
• ISBN 10: 0282829253
• ISBN 13: 9780282829254
• Reliure: Broché
• Nombre de pages: 140
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