As the first time, HF Doppler spectra of sea and land were obtained in China by using HF sky wave backscatter station of China Research Institute of Radiowave Propagation ( CRIRP).

1、

A concept about reflection region is presented, upon which the formulae for calculating field-strength of sky wave are modified to be the integral form and they can be applied in more general cases.

提出了反射区的概念，从而使已有的球面电离层反射的天波场强计算公式改进为积分形式，更适于一般情况。

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2、

The sky wave over the horizon radar ( OTHR) is a new mechanism in which the ionosphere is used as a mirror to reflect the radar high frequency signal to detect the target.

天波超视距雷达（OTHR）是一种利用电离层对高频信号的反射作用自上而下进行目标探测的雷达体制。

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3、

This paper studies the distribution of single-pulse system based on Taylor Slot Array under the feed network integrated design, simulation and physical process from both an analysis of the structure in the sky wave communication applications.

本文主要研究了基于泰勒分布单脉冲体制下的波导缝隙阵馈电网络综合设计，从仿真和实物加工两方面分析了该结构在天波通信中的应用。

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4、

As the main interference, sky wave brings in the form of MAI and near-far effect in the navigation receiver, which can affect the positioning accuracy seriously.

天波作为系统中存在的主要干扰源，在导航接收机中以多址干扰和远近效应等两种形式存在，严重影响系统定位精度。

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5、

During the annular eclipse, ionosphere is disturbed suddenly by the solar activity, the time signal propagation for the Loran-C sky wave exhibits obvious changes.

1987年9月23日发生的日环食期间，由于电离层受太阳活动的突然扰动，Loran&C天波时号传输呈现明显的变化。

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6、

There are mainly two kinds of interferences at this frequency band. One interference is caused by the sky wave and the other one is the near-far effect.

在此频段主要存在两方面的干扰，一是天波对地波的强干扰，二是远近效应。

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7、

The result of practical measurement shows that the sky wave signal whose amplitude changes greatly and fleetly is a typical kind of fast time-varying signal.

实测结果表明，天波信号幅度变化范围大，变化速度快，是一种典型的快速时变信号。

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8、

The transmission of the sky wave is realized by the reflection from ionosphere, especially after reflecting many times, to achieve global communication.

天波的传播是利用电离层的反射来实现的，尤其是多次反射后可以实现全球通信。

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9、

Suzuki SKY WAVE 250 Motorcycle

铃木SKY WAVE250型摩托车

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10、

Relationships Between the Variation of the Solar Constant and the Solar Soft x-ray Radiation and LF Sky Wave Time Delay

太阳常数的变化与太阳软x射线辐射流量及低频天波时延的关系

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11、

Study on Narrowband Interference Suppression in Sky Wave OTHR

天波超视距雷达窄带干扰抑制技术研究

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12、

Research on Loran-C Sky Wave Delay Estimation Using Eigen-decomposition Algorithm

基于特征向量算法的Loran-C天波延迟估计的研究

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13、

A model for evaluating sky wave over-the-horizon radar combat efficiency

天波超视距雷达作战效能评估模型

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14、

Combat Efficiency Evaluation for Sky Wave over-the-horizon Radar Based on ADC Modeling

基于ADC模型的天波超视距雷达作战效能评估

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15、

Review and Description of the Sky Wave Over The Horizon Radar

天波超视距雷达评述

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16、

Development of sky wave over-the-horizon radar

天波超视距雷达的发展

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17、

The Ship Detection of Sky Wave over-the-Horizon Radar with Short Coherent Integration Time

短相干积累条件下天波超视距雷达的舰船检测

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18、

Alison spent the first sixteen years of her life in a small Wiltshire village before she came to London; she's a real child of nature.

阿莉森来伦敦前在威尔特歇小村子里度过了她的生命最初的10年。她真是一个天真纯朴的姑娘。

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19、

I feel like a true "Child" of nature

我感觉自己是纯粹的孩子

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20、

The fourth section reveals that little Pearl is a lonely "child of nature" asking for recognition from her father and the society.

第四节反映小珠儿是一个孤独的自然之子，她一直想要得到父亲和社会的承认。

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