基于小波分解与重构方法研究电离层偶发E层

王栖溪; 牛俊; 方涵先; 范鑫; 包赟

doi:10.11728/cjss2022.02.210127014

基于小波分解与重构方法研究电离层偶发E层

doi: 10.11728/cjss2022.02.210127014

王栖溪^1,,
牛俊^2, ,,
方涵先²,
范鑫³,
包赟¹

1.
解放军31010部队　北京　100081
2.
国防科技大学气象海洋学院　长沙　410000
3.
中国卫星海上测控部　江阴　214431

详细信息

作者简介:
王栖溪：E-mail：wangxixi19920218@126.com

通讯作者:
牛俊，E-mail：niujun@nudt.edu.cn

中图分类号: P352
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- 文章访问数: 225
- HTML全文浏览量: 114
- PDF下载量: 34
- 被引次数: 0
出版历程
- 收稿日期: 2021-01-27
- 录用日期: 2021-09-26
- 修回日期: 2021-07-28
- 网络出版日期: 2022-05-25

A New Ionosphere Sporadic E Research Method Based on Wavelet Decomposition and Reconstruction

WANG Xixi^1
,,
NIU Jun^{2
, ,},
FANG Hanxian²,
FAN Xin³,
BAO Yun¹

1.
31010 Troops of PLA, Beijing 100081
2.
College of Meteorology and Oceanography, National University of Defense Technology, Changsha 410000
3.
China Satellite Maritime Tracking and Control Department, Jiangyin 214431

摘要

摘要: 电离层不规则体对卫星导航、通信、雷达系统等有重要影响。通过数值模拟及与实测数据的对比，论证基于小波分解与重构方法实现利用掩星数据反演电离层不规则体的可行性。以电离层偶发E层为例，利用国际参考电离层（IRI）模拟背景电离层电子密度分布，利用掩星探测的水平电子密度总含量δ_ht反演不规则体信息，并与模拟数据进行比较。对2009年7月1－8日的COSMIC掩星数据进行小波分解与重构，将结果与SPIDR提供的地面观测数据进行对比。数值模拟及与实测数据的对比结果均表明，该方法能够较为准确地得到电离层不规则体的高度和强度信息，这对于电离层不规则体研究具有重要意义。
- 偶发E层 /
- 掩星反演 /
- 小波分解与重构
Abstract: The ionospheric irregularities have important impact on the satellite navigation, communication, radar system etc. In this paper, the numerical simulation and observation data contrast are both carried out to validate the feasibility of wavelet decomposition and reconstruction method. Taking sporadic E for example, in numerical simulation, the background of the electron density distribution is simulated by the International Reference Ionosphere (IRI). Then the horizontal total electron density (δ_ht) is used in the inversion of the ionosphere irregularities, and the results are compared with the simulated data. With the wavelet decomposition and reconstruction method of observation data, the COSMIC occultation data from 1 to 9 in July 2009 have been compared with the ground-based observation data provided by SPIDR. Both results show well accordance with the true value or observation which indicates the method is feasible for the inversion of ionosphere irregularities. This is in great significance for the research of ionosphere irregularities.
- Sporadic E /
- Occultation inversion /
- Wavelet decomposition and reconstruction
注释:

1) http://spidr.ngdc.noaa.gov/spidr/index.jsp（已停止提供数据）

HTML全文

图 1 模拟电离层背景场电子密度分布（虚线为模拟掩星射线路径）

Figure 1. Electron density distribution of the simulated ionosphere (The dotted line is the simulated occultation ray path)

下载: 全尺寸图片幻灯片

图 2 模拟1电离层不规则体电子密度分布（136~146 km，11°N－17°N区域；500%增强扰动）

Figure 2. Electron density distribution of ionospheric irregularities in Simulation 1 (136~146 km，11°N－17°N; 500% enhanced disturbance)

下载: 全尺寸图片幻灯片

图 3 模拟1的小波重构结果。 (a)原始δ_ht随高度变化，(b)重构的低频分量L_ht随高度变化，(c)高频分量H_ht随高度变化

Figure 3. Wavelet reconstruction results of Simulation 1. (a) Original δ_ht variation with height, (b) low frequency L_ht of δ_ht, (c) high frequency H_ht of δ_ht

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图 4 模拟2电离层不规则体电子密度分布（146~186 km，11°N－17°N区域；500%增强扰动）

Figure 4. Electron density distribution of ionospheric irregularities in Simulation 2 (146~186 km, 11°N－17°N; 500% enhanced disturbance)

下载: 全尺寸图片幻灯片

图 5 模拟2小波重构结果。(a)原始δ_ht随高度变化，(b)重构的低频分量L_ht随高度变化，(c)高频分量H_ht随高度变化

Figure 5. Wavelet reconstruction result of Simulation 2. (a) Original δ_ht variation with height, (b) low frequency L_ht of δ_ht, (c) high frequency H_ht of δ_ht

下载: 全尺寸图片幻灯片

图 6 模拟3电离层不规则体电子密度分布（136~146 km，11°N－17°N区域；1000%增强扰动）

Figure 6. Electron density distribution of ionospheric irregularities in Simulation 3 (136~146 km, 11°N－17°N; 1000% enhanced disturbance)

下载: 全尺寸图片幻灯片

图 7 模拟3小波重构结果。 (a)原始δ_ht随高度变化，(b)重构的低频分量L_ht随高度变化，(c)高频分量H_ht随高度变化

Figure 7. Wavelet reconstruction result of Simulation 3. (a) Original δ_ht variation with height, (b) low frequency L_ht of δ_ht, (c) high frequency H_ht of δ_ht

下载: 全尺寸图片幻灯片

图 8 掩星切点轨迹和测站位置分布

Figure 8. Distribution of occultation tangent point trajectory and location of station

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图 9 匹配掩星事件高频分量随高度的分布

Figure 9. H_ht variation with height of the matching occultation

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图 10 UK站2009年7月4日的Es观测结果.(a) Es临频随时间的变化，(b) Es临频高度随时间的变化

Figure 10. Es observation results on 4 July 2009 of UK station. (a) Evolution of the critical frequency, (b) evolution of the height of critical frequency

下载: 全尺寸图片幻灯片

表 1 匹配掩星事件小波分解结果与观测结果对比

Table 1. Comparison between wavelet reconstruction result of matching occultation and observation

测站代号	测站坐标	时间（UT）	临频 /MHz	临频高度/km	高频分量最大值/TECU	高频分量最大值对应高度/km
FF051	(51.7^oN, 1.5^oW)	2009年7月4日 18:00	4.1	103	3.38	100
FF051	(51.7^oN, 1.5^oW)	2009年7月6 日 06:00	3.13	107	1.10	102
AT138	(38^oN, 23.5^oE)	2009年7月2日 02:00	2.25	97	0.186	80.6
EA036	(37.1^oN, 6.7^oW)	2009年7月7日 03:00	2.21	115	0.13	98
JG055	(54.6^oN, 3.4^oE)	2009年7月5日 06:00	3.55	112	1.02	109

下载: 导出CSV

参考文献(13)

[1]	MATHEWS J D. Sporadic E: current views and recent progress[J]. Journal of Atmospheric and Solar-Terrestrial Physics, 1998, 60(4): 413-435 doi: 10.1016/S1364-6826(97)00043-6
[2]	GORDON W E. Incoherent scattering of radio waves by free electrons with applications to space exploration by radar[J]. Proceedings of the IRE, 1958, 46(11): 1824-1829 doi: 10.1109/JRPROC.1958.286852
[3]	FENG M. Detection of High-Latitude Ionospheric Irregularities from GPS Radio Occultation[D]. Calgary: University of Calgary, 2010
[4]	HOCKE K, TSUDA T. Gravity waves and Ionospheric irregularities over tropical convection zones observed by GPS/MET Radio Occultation[J]. Geophysical Research Letters, 2001, 28(14): 2815-2818 doi: 10.1029/2001GL013076
[5]	TSUDA T, HOCKE K. Using GPS satellites to study plasma irregularities[J]. GPS World, 2001, 12(7): 34-36
[6]	LEI J H, SYNDERGAARD S, BURNS A G, et al. Comparison of COSMIC ionospheric measurements with ground-based observations and model predictions: preliminary results[J]. Journal of Geophysical Research, 2007, 112(A7): A07308 doi: 10.1029/2006JA012240
[7]	YUE X, SCHREINER W S, KUO Y H, et al. GNSS radio occultation technique and space weather monitoring[C]//Proceedings of the 26 th International Technical Meeting of the Satellite Division of the Institute of Navigation. Nashville, Tennessee: ION, 2013
[8]	HAJJ G A, IBAÑEZ-MEIER R, KURSINSKI E R, et al. Imaging the ionosphere with the global positioning system[J]. International Journal of Imaging Systems and Technology, 1994, 5(2): 174-187 doi: 10.1002/ima.1850050214
[9]	LEITINGER R, LADREITER H P, KIRCHENGAST G. Ionosphere tomography with data from satellite reception of Global Navigation Satellite System signals and ground reception of Navy Navigation Satellite System signals[J]. Radio Science, 1997, 32(4): 1657-1669 doi: 10.1029/97RS01027
[10]	HOCKE K, IGARASHI K, PAVELYEV A. Irregularities of the topside ionosphere observed by GPS/MET radio occultation[J]. Radio Science, 2002, 37(6): 1101
[11]	王栖溪, 方涵先, 牛俊. 基于COSMIC资料分析电离层F层不规则体结构[J]. 地球物理学报, 2016, 59(2): 419-425 doi: 10.6038/cjg20160202 WANG Xixi, FANG Hanxian, NIU Jun. Analysis of ionospheric irregularities in F layer based on COSMIC data[J]. Chinese Journal of Geophysics, 2016, 59(2): 419-425 doi: 10.6038/cjg20160202
[12]	YEH W H, HUANG C Y, HSIAO T Y, et al. Amplitude morphology of GPS radio occultation data for sporadic-E layers[J]. Journal of Geophysical Research, 2012, 117(A11): A11304 doi: 10.1029/2012JA017875
[13]	NIU J, FANG H X, WANG X X, et al. Analysis of the ionosphere irregularities in E region based on COSMIC occultation data[J]. Advances in Space Research, 2015, 56(9): 1895-1900 doi: 10.1016/j.asr.2015.04.014