Tactical Missile Aerodynamics. Progress in Aeronautics and Astronautics Vol. 104. Edited by M. J. Hemsch and J. N. Nielsen. American Institute of Aeronautics and Astronautics, Inc, New York. 1986. 858 pp. Illustrated. $89.50 (Non-AIAA Members), $59.50 (AIAA Members).

Crabtree, L. F.

doi:10.1017/s0001924000021680

Cited by 2 publications

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“…Thus, it is likely that the O + ‐O cross section was also affected by about 5%. S1991 also included several revisions to the potential curve without any explanation of the impacts, as outlined in Partridge and Stallcop (1986).…”

Section: Theoretical Differencesmentioning

confidence: 99%

Atomic Oxygen Ion‐Neutral Collision Frequency Models at Ionospheric Temperatures

Ieda

2021

JGR Space Physics

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The collision between atomic oxygen and its first positive ion plays a major role in Earth's F region ionosphere. An accurate corresponding collision frequency model is necessary to quantitatively understand the ionosphere. However, the widely used classic Banks theoretical model typically provides a collision frequency that is 30% lower than the expectation from ionospheric observations. Accordingly, the classic collision frequency is often adjusted by multiplying it by a constant known as the Burnside factor. This correction‐factor model adopted the classic model as its basis due to a misunderstanding that the classic model was based on a laboratory experiment; that is, the correction factor was originally meant to compensate for laboratory contamination. In this study, a collision frequency model is constructed based on the laboratory experiment, and the resultant laboratory‐based model is found to be consistent with ionospheric observations. In this construction, the impact of laboratory contamination is determined to be small (7%) and is mostly canceled by a misinterpretation regarding the conventional definitions of energy. Thus, the 30% difference is mainly caused by a theoretical error in the classic model itself. This error is energy‐dependent and corrected by the later wide‐energy theoretical model. Thus, the classic model cannot be corrected by a temperature‐independent constant and should be replaced by the later model.

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Section: Theoretical Differencesmentioning

confidence: 99%

Atomic Oxygen Ion‐Neutral Collision Frequency Models at Ionospheric Temperatures

Ieda

2021

JGR Space Physics

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Simulation‐Based Early Prediction of Rocket, Artillery, and Mortar Trajectories and Real‐Time Optimization for Counter‐RAM Systems

Ramezani

Rothe

2017

Mathematical Problems in Engineering

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The threat imposed by terrorist attacks is a major hazard for military installations, for example, in Iraq and Afghanistan. The large amounts of rockets, artillery projectiles, and mortar grenades (RAM) that are available pose serious threats to military forces. An important task for international research and development is to protect military installations and implement an accurate early warning system against RAM threats on conventional computer systems in out-of-area field camps. This work presents a method for determining the trajectory, caliber, and type of a projectile based on the estimation of the ballistic coefficient. A simulation-based optimization process is presented that enables iterative adjustment of predicted trajectories in real time. Analytical and numerical methods are used to reduce computing time for out-of-area missions and low-end computer systems. A GUI is programmed to present the results. It allows for comparison between predicted and actual trajectories. Finally, different aspects and restrictions for measuring the quality of the results are discussed.

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Tactical Missile Aerodynamics. Progress in Aeronautics and Astronautics Vol. 104. Edited by M. J. Hemsch and J. N. Nielsen. American Institute of Aeronautics and Astronautics, Inc, New York. 1986. 858 pp. Illustrated. $89.50 (Non-AIAA Members), $59.50 (AIAA Members).

Cited by 2 publications

References 0 publications

Atomic Oxygen Ion‐Neutral Collision Frequency Models at Ionospheric Temperatures

Atomic Oxygen Ion‐Neutral Collision Frequency Models at Ionospheric Temperatures

Simulation‐Based Early Prediction of Rocket, Artillery, and Mortar Trajectories and Real‐Time Optimization for Counter‐RAM Systems

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