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首页> 外文会议>Conference on Optics in Atmospheric Propagation and Adaptive Systems Ⅳ Sep 18-20, 2001, Toulouse, France >Passive ranging through the Earth's atmosphere
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Passive ranging through the Earth's atmosphere

机译：被动穿越地球大气

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摘要

Many luminous sources provide continuous or quasi-continuous radiation at near IR and longer wavelengths. The radiation continuum serves as a source of background photons, which can be used for discrete line-of-site absorption measurements by-known atmospheric constituents. The intensity ratio is uniquely determined by the absorption coefficient and range, and is independent of broadband attenuations and scattering. The absorption coefficients are known and/or can be accurately calculated for a wide range of practical viewing conditions (i.e., sensor height, viewing angle, etc.). Hence, the intensity ratio and/or integrated intensity ratio can be used to uniquely derive the range of the radiating source. Fabry-Perot interferometers can provide the high throughputs and resolving powers required in compact packages. The measurements and analyses show that ranging accuracies representing down to 1 -2% of the total range should be achievable at stand-off ranges of upto hundreds of kilometers depending on the size of the collection optics, brightness of the source and available observation times. The paper will provide an overview of the patented Textron concepts, trade-offs associated with instrument resolving powers and hardware implementation issues.
机译：许多发光源提供接近IR和更长波长的连续或准连续辐射。辐射连续体用作背景光子的源，可用于已知大气成分的离散站点线吸收测量。强度比由吸收系数和范围唯一确定，并且与宽带衰减和散射无关。对于宽范围的实际观察条件（即传感器高度，视角等），吸收系数是已知的和/或可以精确计算的。因此，强度比和/或积分强度比可用于唯一地得出辐射源的范围。法布里-珀罗干涉仪可提供紧凑型封装所需的高通量和分辨能力。测量和分析表明，取决于收集光学器件的大小，光源的亮度和可用的观察时间，在长达数百公里的对峙范围内，应能实现占总范围低至-2％的测距精度。本文将概述专利的德事隆概念，与仪器解决能力相关的权衡以及硬件实施问题。

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