Measurement of Atmospheric Transmissivity using Backscattered Light from a Pulsed Light Beam*

Horman, Melvin H.

doi:10.1364/josa.51.000681

Cited by 10 publications

(1 citation statement)

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“…To avoid the complexity and the calculation time involved in the iterative method, a data-fitting method was adopted in the present study to obtain the variation of the detection range as a function of the atmosphere transmissivity. The atmosphere transmissivity data at different altitudes and latitudes can be obtained from experiments 23) or LOWTRAN. 24) In Table 1, the atmospheric transmittance of a rural aerosol model is presented as calculated by the LOWTRAN code at different ranges.…”

Section: Ir Suppression Effectiveness Evaluationmentioning

confidence: 99%

Evaluating the Effectiveness of Infrared Signature Suppression of Aircraft Skin

Wang

Kwon

2012

Trans. Japan Soc. Aero. S Sci.

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During typical supersonic cruising, the temperature of the aircraft skin rises above 300 K due to aerodynamic heating. In this situation, aircraft-skin infrared (IR) suppression, used to minimize the radiation contrast from the background is a crucial survival technology. In the present study, a technique to evaluate the effectiveness of IR suppression of aircraft skin is proposed. For this purpose, a synthetic procedure based on numerical simulations has been developed. In this procedure, the thermal status of aircraft skin is obtained using a computational fluid dynamics (CFD) method for complex aircraft geometries. An IR signature model is proposed using a reverse Monte Carlo (RMC) technique. The detection range and the IR contrast are adopted as the performance indicators for the evaluation of the aircraft IR suppression. The influence of these factors related to the aircraft-skin radiation, such as aircraft-skin emissivity, surface temperature distribution and flight speed, on the IR contrast and the detection range is also studied. As a test case, the effectiveness of various IR suppression schemes was analyzed for a typical air combat situation. Then, the method is applied to clarify the contribution of each aircraft component to the IR suppression of the overall IR radiation. The results show that aircraftskin temperature control and emissivity control are effective means to reduce the IR radiation and to achieve lower detection. The results can be used as a practical guide for designing future stealth aircraft.

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Section: Ir Suppression Effectiveness Evaluationmentioning

confidence: 99%

Evaluating the Effectiveness of Infrared Signature Suppression of Aircraft Skin

Wang

Kwon

2012

Trans. Japan Soc. Aero. S Sci.

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Lidar: A new atmospheric probe

Collis

1966

Quart J Royal Meteoro Soc

122

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SUMMARYPulsed-light techniques of probing the atmosphere have been greatly extended by employing lasers as energy sources in instruments called ' lidars.' Because of the nature of laser energy and the manner in which it is used in current and proposed systems, lidar is best discussed in terms of radar. Apart from the basic capabilities of lidar for detecting backscattering from atmospheric constituents, possibilities exist for more sophisticated techniques based on the wave nature of the energy. The basic capabilities of lidar, however, make it possible to observe the atmosphere with previously unknown resolution and sensitivity. Apart from providing new information about clouds, lidar has shown that the concentration of the particulate matter content of clear air is highly variable and that such variations can indicate the structure and motion of the clear atmosphere. These capabilities have applications in atmospheric and meteorological research and various operational activities.

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Laser Applications in Atmospheric Research

Zuev¹

1982

Laser Beams in the Atmosphere

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Measurement of Atmospheric Transmissivity using Backscattered Light from a Pulsed Light Beam*

Cited by 10 publications

References 1 publication

Evaluating the Effectiveness of Infrared Signature Suppression of Aircraft Skin

Evaluating the Effectiveness of Infrared Signature Suppression of Aircraft Skin

Lidar: A new atmospheric probe

Laser Applications in Atmospheric Research

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