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2 Security and Defence Quarterly

2 2013

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The analysis of the acoustic wave velocity on the target localization accuracy

Melša Pavel, Bechová Lenka

Security and Defence Quarterly

2013

Vol. 1, No. 1

220--228

The accuracy of target localization using acoustic methods depends on atmospheric conditions. The acoustic wave velocity varies with fluctuation of atmospheric temperature, presure and humidity. Therefore, a mathematical model for the description of acoustic wave velocity on target localization accuracy has been described. The results are presented and commented upon.

History of the air force of the Czech Republic and its status in the 21st century

Bechová Lenka

Security and Defence Quarterly

2013

Vol. 1, No. 1

193--199

Aircraft producers of the Czech Republic are well-known all over the world. The history of Czech aircraft production started at the end of the 19'" century and it has continued into the present. During this time the construction of the aircraft and their production has been changed a lot; however nowadays there is a big question about the future cooperation between the Czech army and Czech aircraft producers and what is the future of the Czech Air Force.