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ocean echo
相关语句
  海洋回波
     AN OCEAN ECHO SIGNAL SIMULATION SYSTEM FOR VERIFICATION AND CALIBRATION OF FMICW HIGH FREQUENCY GROUND WAVE RADAR,
     FMICW高频地波海况监测雷达海洋回波信号仿真模拟检验系统
短句来源
     Simulation and Calibration of Ocean Echo
     海洋回波模拟与定标
短句来源
     High frequency ground wave radar for near ocean inspection and ocean remote sensor is a method that use ocean echo wave Dopier spectrum to deduce the parameters of ocean situation.
     高频地波雷达近海监测和海态遥感技术是一种利用海洋回波多普勒谱反演海态参数的方法。
短句来源
  “ocean echo”译为未确定词的双语例句
     Barrick's method of FMICM radar signal processing for range/Doppler/angle of ocean echo determi nation is introduced first.
     Barrick提出的线性调频中断连续波 (FMICW)雷达信号处理方法 ,探测海洋表面回波距离、Doppler频移和角度信息 .
短句来源
     In order to debug and calibrate high frequency ground radar in laboratory, simulation of ocean echo is needed.
     根据雷达探测的原理 ,利用超声延时线对高频地波雷达射频信号延时一个固定时间的方法 ,实现了对探测目标距离的模拟 .
短句来源
     An ocean echo signal simulation system for verification and calibration of FMICW high frequency ground wave radar is presented in this paper.
     该文给出一种调频中断连续波(FMICW)高频地波海况监测雷达的仿真模拟检验系统。
短句来源
     It is based on the principle of FMICW radar and inversion of Bragg-Doppler(B-D) spectrum. The ocean echo signals are simulated with the digital synthesis techniques. They are used for calibration of the sea-state ocean radar.
     该系统基于FMICW高频地波雷达的工作机理,以及一阶和二阶Bragg-Doppler谱的反演原理,利用直接数字合成的技术仿真出海洋雷达回波的模拟信号,以供雷达的校准与定标之用.
短句来源
     Compared to common imaging mode, this mode increases SNR of ocean echo by decreasing the bandwidth, then accuracy of fixed position can be improved.
     和普通成像模式相比,该模式通过降低带宽的方式来提高回波的信噪比,从而提高了定位精度。
短句来源
  相似匹配句对
     Echo
     回音
短句来源
     Simulation and Calibration of Ocean Echo
     海洋回波模拟与定标
短句来源
     The Eternal Ocean
     永恒的海洋(英文)
短句来源
     The Ocean World
     海洋世界
短句来源
     The Echo of the Body
     身体的回声
短句来源
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This paper deals with the satellite-borne radar altimeter. After a review of the main basic principles, attention is focussed on the tracking processing simulation which is based on ocean echo in frequency. In the end, simulation results are given.

本文首先介绍了星载高度计的工作原理,然后从海面回波的频域生成出发,对星载高度计跟踪过程进行了仿真并给出了仿真结果。

The ocean echo of the HF radar decreases rapidly because of absorption of the HF electromagnetic waves by the seawater. Thus the detecting range of the HF pulse modulation ocean surface radar is badly limited. Increasing the tranmitting power can promote the detecting range in some extent. The high anti interference property of the spread spectrum system will improve the existed HF radar in promoteing detective range and decreasing the transmitting power.

利用扩频通信良好的抗干扰性和低功率谱密度下工作的特点,本文把扩频技术引入高频海洋探测雷达来探测海洋一阶回波,研究结果表明,该技术对回波质量无不良影响,同时可降低雷达发射功率,增加雷达探测距离.

Radar altimeter(RA) is a kind of active microwave remote sensor,which can measure the distance between the platform and the sea surface,the ocean wave height and the back scattering coefficient.The control system performs an important action in RA,which tracks the return wave and gives the measurement results in real time.\;In this paper,the characteristic of ocean echo is analyzed according to the ocean echo Model of Brown.Either the ocean returen wave noise with an exponential distribution,or...

Radar altimeter(RA) is a kind of active microwave remote sensor,which can measure the distance between the platform and the sea surface,the ocean wave height and the back scattering coefficient.The control system performs an important action in RA,which tracks the return wave and gives the measurement results in real time.\;In this paper,the characteristic of ocean echo is analyzed according to the ocean echo Model of Brown.Either the ocean returen wave noise with an exponential distribution,or the thermal noise with a uniform distribtuion are simulated to discover the statistics characteristic of the return wave form.A new space borne radar altimeter tracker based on maximum likelihood estimate (MLE) is completed,which includes height loop,SWH loop and AGC loop.The perfect haleness and accuracy of the tracker is shown in the flight experiment.The principle,the hardware design and the work specifications of the tracker are present together with some flight experiment data.

根据 Brown海面回波模型 ,分析了海面回波中的噪声分布特性 ,即功率谱分别呈指数分布的海面回波噪声和呈均匀分布的热噪声 ,并对此进行了仿真研究。在此基础上对海面回波的最大似然跟踪处理方法进行了分析 ,提出了基于最大似然估计的跟踪器的实现方法 ,介绍了其工作原理、硬件实现方法以及主要工作指标。该跟踪器在校飞实验中获得成功 ,获得了大量实验数据 ;展示了回波波形、跟踪轨迹等校飞数据 ,从这些结果上反映出该跟踪器的精确性和健壮性

 
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