Engineering Mechanics

International Conference

Proceedings Vol. 27/28 (2022)


May 9 – 12, 2022, Milovy, Czech Republic
Editors: Cyril Fischer and Jiří Náprstek

Copyright © 2022 Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, Prague

ISBN 978-80-86246-48-2 (printed)
ISBN 978-80-86246-51-2 (electronic)
ISSN 1805-8248 (printed)
ISSN 1805-8256 (electronic)

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Measured met data filtering for corrections of very long projectile trajectories
Čech V.
pages 53 - 56, full text

If for any reason it is not possible to use an automated fire control system, then especially in combat conditions it is necessary to use an alternative method of calculating the mean point of impact position. To do this, tabular firing tables (TFT) are used together with the corresponding type of artillery meteorological message. This case is extremely common in practice. So far, we have demonstrated the effectiveness of filtering measured met data using generalized reference height of the projectile trajectory YCR (characteristics of the digital FIR filter) for effective estimation of ballistic values of met parameters, which are outputs from corresponding filters (wind vector, air virtual temperature, air pressure, air density). The relationships for YCR are derived assuming an approximation of the measured met data by a single linear function. This assumption is not suitable for very long artillery projectile trajectories, when their vertex (summit) is in the tropopause or even in the lower stratosphere. In this paper, I present a follow-up theory of filtering based on the assumption that the measured met data are approximated by a suitable linear spline function. Derived relationships are also suitable for use in field and combat conditions.

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