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DOI | 10.1117/1.602079 |
Middle atmosphere slant-path optical turbulence conditions derived from very high frequency radar observations | |
Eaton, FD; Nastrom, GD; Hansen, AR | |
通讯作者 | Eaton, FD |
来源期刊 | OPTICAL ENGINEERING |
ISSN | 0091-3286 |
出版年 | 1999 |
卷号 | 38期号:2页码:200-207 |
英文摘要 | Slant path calculations are shown of the transverse coherence length (r(0)), the isoplanatic angle (theta(0)), and the Rytov variance (sigma(R)(2)), using a 6-yr data set of refractive index structure parameter (C-n(2)) from 49.25-MHz radar observations at White Sands Missile Range, New Mexico. The calculations are for a spherical wave condition; a wavelength (lambda) of electromagnetic radiation of 1 mu m; four different elevation angles (3, 10, 30, and 60 deg), two path lengths (50 and 150 km); and a platform, such as an aircraft, at 12.5 km MSL (mean sea level). Over 281,000 radar-derived C-n(2) profiles sampled at 3 min intervals with 150-m height resolution are used for the calculations. The approach, an "onion skin" model, assumes horizontal stationarity over each entire propagation path and is consistent with Taylor’s hypothesis. The results show that refractivity turbulence effects are greatly reduced for the three propagation parameters (r(0), theta(0), and sigma(R)(2)) as the elevation angle increases from 3 to 60 deg. A pronounced seasonal effect is seen on the same parameters, which is consistent with climatological Variables and gravity wave activity. Interactions with the enhanced turbulence in the vicinity of the tropopause with the range weighting functions of each propagation parameter is evaluated. Results of a two region model relating r(0), theta(0), and sigma(R)(2) to wind speed at 5.6 km MSL are shown. This statistical model can be understood in terms of upward propagating gravity waves that are launched by strong winds over complex terrain. (C) 1999 Society of Photo-Optical Instrumentation Engineers. [S0091-3286(99)01202-7]. |
英文关键词 | retractive index structure parameter transverse coherence length isoplanatic angle Rytov variance turbulence radar remote sensing atmospheric propagation |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000078505200001 |
WOS关键词 | SANDS-MISSILE-RANGE ; WHITE-SANDS ; NEW-MEXICO ; DESERT |
WOS类目 | Optics |
WOS研究方向 | Optics |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/137993 |
作者单位 | (1)USAF, Res Lab, Kirtland AFB, NM 87117 USA;(2)St Cloud State Univ, St Cloud, MN 56301 USA |
推荐引用方式 GB/T 7714 | Eaton, FD,Nastrom, GD,Hansen, AR. Middle atmosphere slant-path optical turbulence conditions derived from very high frequency radar observations[J],1999,38(2):200-207. |
APA | Eaton, FD,Nastrom, GD,&Hansen, AR.(1999).Middle atmosphere slant-path optical turbulence conditions derived from very high frequency radar observations.OPTICAL ENGINEERING,38(2),200-207. |
MLA | Eaton, FD,et al."Middle atmosphere slant-path optical turbulence conditions derived from very high frequency radar observations".OPTICAL ENGINEERING 38.2(1999):200-207. |
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