电离层扰动

针对采用调频连续波（FMCW）体制的天波超视距雷达的应用场合，提出了一种电离层扰动（慢相径变化）补偿改进算法。

This paper presents an improved arithmetic for extracting and compensating the phase-path variations caused by the ionospheric disturbance in a HF sky-wave OTH radar with FMCW waveform .

极光区电离层扰动的两种类型

Two types of ionospheric disturbance in the auroral region

随机电离层扰动的GPS监测理论及框架方案研究

Research on the basic theory and framework scheme of monitoring random ionospheric disturbances using GPS data

2003年10月29～31日太阳耀斑对中国大陆电离层扰动的GPS监测与分析

Monitor solar flare during October 29-31,2003 and analysis of its disturbances to ionosphere over China by GPS measurements

研究结果表明：汶川地震前3天即5月9日出现电离层扰动异常，并且Ti参量异常尤其明显。

The results indicate that : Three days before Wenchuan Earthquake that is the May 9 the precursors are very obvious , and Ti anomaly is particularly evident .

在理论分析慢相径调制干扰的基础上，对算法进行了两方面优化：两个一阶Bragg峰得到的电离层扰动信息的动态加权；

Based on the theoretical analysis of the radar echoes ' distortion by the slow phase-path-modulation disturbance , two optimization aspects are considered . One is using the prior knowledge of the amplitude difference between the two first-order Bragg peaks to acquire optimum weighting .

时间-空间域：针对50-300Hz频段研究发现，电离层扰动主要出现在震中距400km的范围内，正负扰动都有出现。

Time-space region : Aiming at 50-300 Hz frequency band in time-space region , we found that ionosphere disturbances mainly appear in the 400 km range of distance from epicenter , and the positive and negative anomalous are both observed .

与地震有关的电离层扰动的甚低频/低频无线电探测

VLF / LF radio sounding of ionospheric perturbations associated with earthquakes

利用射线追踪研究电离层扰动

A study of the disturbance in the ionosphere using ray tracing technology

大气重力波产生的大尺度赤道电离层扰动

Ionospheric disturbances produced by atmospheric gravity waves in the equatorial F region

对挑战者号爆炸激发的电离层扰动的讨论

Discussions on the ionosphere disturbances caused by the explosion of space shuttle Challenger

磁暴期间全球电离层扰动形态分析和理论研究

Morphology analysis and theoretical study of global ionospheric disturbances during magnetic storm times

中低纬度地区连续运行参考站网络电离层扰动修正技术研究

Ionospheric disturbance delay correction method for reference station network over mid & low latitude region

电离层扰动的高频探测与诊断

HF Sounding and Diagnosis of Ionospheric Disturbances

本文得到了核爆炸产生的附加电离区和电离层扰动的参数。

The parameters of the additional ionization and the ionospheric disturbance due to the nuclear explosion are obtained .

本文分析了磁暴期间南极长城站的电离层扰动特性。

In this paper , ionospheric disturbances during geomagnetic storms at the Great Wall station in Antarctic are studied .

通过相位补偿有效地抑制了电离层扰动造成的多普勒谱展宽和频率漂移。

With transient frequency modulation estimation , the widened Doppler spectrum may not only be narrowed but also the Doppler shift compensated .

作者认为，地震前的电离层扰动是存在的，并提出了一些可能与地震有关的定性的指标。

The existence of the ionospheric disturbances has been well verified before earthquakes , and this paper provides some preliminary information for the prediction of an earthquake .

而在频高图模式下，虽然工作的频点多，能够获得电子浓度的高度剖面的信息，但探测的多普勒频移的分辨率低，无法用来精确检测电离层扰动。

However , in ionogram mode , though Digisonde works with many sounding frequencies , the resolution of Doppler shift is too low to detect ionospheric disturbances precisely .

重建算法的特点是利用差分多普勒频率数据避免了相位积分常数的计算，提高了对较弱的电离层扰动和不规则结构的检测能力。

The algorithm avoids the calculation of integral phase constant by exploiting the differential Doppler frequency data , thus its capability of detecting weaker ionospheric irregularities has been enhanced .

基于返回散射探测的电离层扰动电离图，本文建立了一个新的对称的准余弦电离层扰动数学模型。

Based on the ionogram of the ionosphere disturbance obtained from backscatter sounding , in this paper , a new symmetrical quasi-cosine function is introduced to describe the ionosphere disturbance model .

最后基于这种电离层扰动模型，利用射线追踪技术描述了不同电离层扰动参数下的电波传播情况，研究了其天波传播的跳距、覆盖区域的大小及射线俘获等。

Finally , we describe the propagation condition of HF radiowaves in the ionosphere disturbance region with various parameters of ionosphere disturbance via ray tracing technology , and analyze the irradiation range , the jump distance and seizing of the radiowaves traversing the ionosphere disturbance region .

基于中国大陆2000年以来的33个6级以上震例资料，对地震电离层扰动效应进行了统计研究，总结了强震前电离层异常特征。

Using these methods , we make a statistical analysis of earthquake cases on the basis of M ≥ 6 earthquakes occurred after 2000 in China , and summarize ionospheric abnormal characteristics before strong earthquakes to provide support for the application of ionospheric monitoring methods in earthquake prediction .

高纬电离层扰动在非延迟型主相磁暴恢复相期间会出现明显的地方时效应，地方时效应随纬度的降低而增强，并且会明显影响到中低纬电离层的扰动；

The ionospheric disturbances at the high-latitude have the evident local time effect in the recovery phase of storm with no delayed main phase . The local time effect is enhanced with the reduction of latitude , and evidently affects on the ionosphere disturbances at the middle-low latitudes .

不同地磁扰动事件期间全球电离层的扰动形态分析

Morphologies of global ionospheric disturbances during different type geomagnetic disturbance events

新疆于田7.2级地震前的电离层电磁扰动

Ionospheric Electro-magnetic Disturbances Prior to Yutian 7.2 Earthquake in Xinjiang

1984年4月份兰州地区电离层行波扰动的观测结果及初析

Observations and analysis of the travelling ionospheric disturbances at Lanzhou in April 1984

在合成孔径射电成像中，电离层的扰动会在接收信号中引入相位误差，导致图像出现模糊和漂移。本文提出了一种新方法，用于这种相位误差的校正。

This paper presents a new method to correct the phase error caused by ionospheric disturbance in the synthetic aperture radio imaging .

NOx羽烟引起的局部电离层电子密度扰动

Electron density disturbance in local ionosphere caused by NOx Exhaust Plume

GPS电离层延迟改正及其扰动监测的分析研究

Study on GPS Ionospheric Delay Correction and Analysis of Disturbance Monitoring