Using the local ensemble Transform Kalman Filter for upper atmospheric modelling

Using the local ensemble Transform Kalman Filter for upper atmospheric modelling
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使用局部系综变换卡尔曼滤波器进行高层大气建模

DOI:
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发表时间:
2019
影响因子:
3.3
通讯作者:
M. Angling
M. Angling
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
S. Elvidge;M. Angling

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先进系综电子密度同化系统(AENeAS)是一种新的电离层/热层数据同化模型。背景模式由热层电离层电动力学环流模式(TIE-GCM)提供,同化采用局域综变换卡尔曼滤波(LETKF)。给出了LETKF的概要推导,并以类似于经典卡尔曼滤波器的形式给出了方程。本文还描述了对高效LETKF实现的增强,以减少计算成本。在2017年6月为期3天的测试中,AENeAS的总电子含量(TEC)均数误差为2.1 TECU,而NeQuick为5.5 TECU, TIE-GCM为6.8 TECU(顶部有NeQuick)。
The Advanced Ensemble electron density (Ne) Assimilation System (AENeAS) is a new data assimilation model of the ionosphere/thermosphere. The background model is provided by the Thermosphere Ionosphere Electrodynamics General Circulation Model (TIE-GCM) and the assimilation uses the local ensemble transform Kalman filter (LETKF). An outline derivation of the LETKF is provided and the equations are presented in a form analogous to the classic Kalman filter. An enhancement to the efficient LETKF implementation to reduce computational cost is also described. In a 3 day test in June 2017, AENeAS exhibits a total electron content (TEC) RMS error of 2.1 TECU compared with 5.5 TECU for NeQuick and 6.8 for TIE-GCM (with an NeQuick topside).
DOI: 10.1002/2014ja020799
发表时间: 2016-01
期刊: Journal of Geophysical Research: Space Physics
影响因子: --
作者:
A. Chartier;T. Matsuo;Jeffrey L. Anderson;N. Collins;T. Hoar;G. Lu;C. Mitchell;A. Coster;L. Paxton;G. Bust
通讯作者: A. Chartier;T. Matsuo;Jeffrey L. Anderson;N. Collins;T. Hoar;G. Lu;C. Mitchell;A. Coster;L. Paxton;G. Bust