sky wave

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

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

Effect of annular eclipse on time signal propagation of Loran-C sky wave

日环食对LORAN-C天波时号传输的影响

Development of sky wave over-the-horizon radar

天波超视距雷达的发展

The stability and space correlation about the sky wave propagation time-delay in Loran-C system are studied.

研究了罗兰 -C 天波传播时延的稳定性与空间相关性.

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。

Since the surveillance area of sky wave Over-The-Horizon Radar ( OTHR) is very vast, realizing the ship detection with short coherent integration time ( CIT) is an operational requirement for OTHR.

天波超视距雷达（OTHR）的观测范围非常广，实战中经常要求在短相干积累条件下检测出舰船目标。

This Paper describes in detail the basic principle of Loran-C LF sky-wave propagation delay measurement and discusses emphatically the particular ways to control the degree of accuracy of the measurement.

本文系统地介绍了罗兰&C天波传播时延测量的基本原理，并着重讨论了控制测量精度的具体途径。

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。

In the first part of this paper some typical methods for measuring sky long wave radiation and sky effective temperature are briefly reviewed.

本文的第一部分对天空长波辐射和天空有效温度的测定方法作了简要评述。

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

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。

Review and Description of the Sky Wave Over The Horizon Radar

天波超视距雷达评述

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。

A method for extracting the characteristic of small targets was presented in the ground based sky from long wave infrared images.

提出了长波红外图像中近地空中小目标特性抽取的一种方法。

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

Serial cloudy sky and cold wave in cold half year brings about a greater impact on the quality and yield of vegetable.

冬半年经常发生连阴天气和寒潮天气，严重影响了蔬菜的质量和产量。

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

Comparing the eclipse depth time, in Shanghai area it was delayed about 30 minuted when this effect reached peak value. This fact could be considered to come from the change of reflecting point of the sky wave signal during the disturbed ionosphere condition.

在上海区域内，这种影响达到峰值的时刻比食甚时刻延迟了约30分钟，这是处于扰动电离层状态中天波反射点变化的反映。

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。

Flower of the Sky-the Lotus Pattern Suzuki SKY WAVE 250 Motorcycle

宇宙图式中的天穹之花&柿蒂纹辨铃木SKY WAVE250型摩托车

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。

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

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。

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。

Suzuki SKY WAVE 250 Motorcycle

铃木SKY WAVE250型摩托车

Experiments and Calculations of the 100 kHz Sky-wave

100kHz天波的实验和计算

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).

用中国电波传播研究所高频天波返回散射探测站进行的我国首次陆地/海洋回波谱的实验研究，其中包括自行研制的实验设备，实验结果。

The idiographic behave is that after certain distance propagation, the signal strength of sky wave will exceed the strength of ground wave apparently, it makes the receiver lock on the sky wave by error and the positioning result will deviate from the actual position.

其具体表现为：在传播一定距离后，天波信号强度远大于地波，导致接收机错误的锁定在天波上，使系统解算结果偏离实际载体位置。

After a moment the light dimmed, and he looked up to see Luclin broken apart in the sky, a wave of energy carrying chunks of debris rapidly toward Norrath.

瞬间过去，光芒暗淡下来，他抬起头看见路卡琳在天空中裂成随片，一道冲击波夹杂着大块的残骸向诺拉斯急速的飞来。