Doppler imaging system: an optical device for measuring vector winds. 1: General principles.
Doppler imaging system: an optical device for measuring vector winds. 1: General principles.
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多普勒成像系统：用于测量矢量风的光学装置。
DOI：
10.1364/ao.22.001078
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发表时间：
1983
期刊：
影响因子：
1.9
通讯作者：
A. Greenaway
中科院分区：
文献类型：
--
作者：
D. Rees;A. Greenaway
多普勒成像系统是一个法布里-珀罗光谱仪，适用于使用空间敏感的光子探测器，以提供一个完整的2-D成像能力的几个仪器站的每一个。视线风根据每个空间定义像素的多普勒频移确定。全矢量风场可以使用三个仪器站获得，但代价是增加数据处理和先验信息要求，从两个或甚至一个仪器站获得。这里概述的建议是建立一个双基地系统，在相距约200公里的台站放置地面仪器，每台仪器使用广角前向光学装置（120度）观测极光椭圆附近的高层大气排放。这种系统应能够在二维空间网格上使用例如OI 630 nm发射来测量风，测量范围达直径约800 km的区域，具有50 km平方像素，并在约10 min的积分时间内产生精度为+/-20 m/sec的风测量值。
The Doppler imaging system is a Fabry-Perot spectrometer adapted to use a spatially sensitive photon detector to provide each of several instrument stations with a full 2-D imaging capability. Line-of-sight winds are determined from the Doppler shifts for each spatially defined pixel. Full vector wind fields may be obtained using three instrument stations and, at the cost of increased data processing and a priori information requirements, from two or even one instrument station. The proposal outlined here is for a bistatic system with ground-based instruments located at stations separated by some 200 km, each using wide-angle foreoptics(120 degrees) to observe upper atmospheric emissions in the vicinity of the auroral oval. Such a system should be capable of measuring winds, using, for example, the OI 630-nm emission, on a 2-D spatial grid, over a region up to approximately 800-km diam, with 50-km square pixels, and yield wind measurements with accuracies +/-20 m/sec in integration times of approximately 10 min.