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Auroral ionospheric E region parameters obtained from satellite-based far ultraviolet and ground-based ionosonde observations: 1. Data methods and comparisons

機譯:從基于衛(wèi)星的遠紫外線和基于地面的電離探空儀觀測獲得的極光電離層E區(qū)域參數:1.數據方法和比較

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摘要

A large number (~1000) of coincident auroral far ultraviolet (FUV) and ground-based ionosonde observations are compared. This is the largest study to date of coincident satellite-based FUV and ground-based observations of the auroral E region. FUV radiance values from the NASA Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics (TIMED) Global Ultraviolet Imager (GUVI) and the Defense Meteorological Satellite Program (DMSP) F16 and F18 Special Sensor Ultraviolet Spectrographic Imager (SSUSI) are included in the study. A method is described for deriving auroral ionospheric E region maximum electron density (NmE) and height of maximum electron density (hmE) from N2 Lyman-Birge-Hopfield (LBH) radiances given in two channels using lookup tables generated with the Boltzmann 3-Constituent (B3C) auroral particle transport and optical emission model. Our rules for scaling (i.e., extracting ionospheric parameters from) ionograms to obtain auroral NmE and hmE are also described. Statistical and visual comparison methods establish statistical consistency and agreement between the two methods for observing auroral NmE, but not auroral hmE. It is expected that auroral non-uniformity will cause the two NmE methods to give inconsistent results, but we have not attempted to quantify this effect in terms of more basic principles, and our results show that the two types of NmE observations are well correlated and statistically symmetrical, meaning that there is no overall bias and no scale-dependent bias.
機譯:比較了大量(?1000)重合的極光遠紫外線(FUV)和地面離子探空儀的觀測結果。這是迄今為止基于衛(wèi)星的FUV和極光E地區(qū)的地面觀測同時進行的最大規(guī)模的研究。研究中包括來自NASA熱層,電離層,中層能量與動力學(TIMED)全球紫外成像儀(GUVI)和國防氣象衛(wèi)星計劃(DMSP)F16和F18特殊傳感器紫外光譜成像儀(SSUSI)的FUV輻射值。描述了一種方法,該方法使用兩個玻爾茲曼3成分生成的查找表,從兩個通道中給出的N2萊曼-伯奇-霍普菲爾德(LBH)輻射中得出極光電離層E區(qū)最大電子密度(NmE)和最大電子密度(hmE)的高度(B3C)極光粒子傳輸和光發(fā)射模型。還描述了我們縮放電離圖(即從電離層中提取電離層參數)以獲得極光NmE和hmE的規(guī)則。統(tǒng)計和視覺比較方法建立了兩種觀測極光NmE而不是極光hmE的統(tǒng)計一致性和一致性。預期極光的不均勻性將導致兩種NmE方法給出不一致的結果,但是我們沒有嘗試根據更基本的原理來量化這種效果,并且我們的結果表明兩種類型的NmE觀測值具有很好的相關性,并且統(tǒng)計上對稱,這意味著不存在總體偏差,也不存在與比例相關的偏差。

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