FSO's main drawback is that bad weather, such as rain or fog, can interrupt the signal.
无线光通信的主要缺点是恶劣的天气，如下雨和大雾，能干扰信号传送。
Beijing Institute of Radio Measurement - radar, communication and electronics, precision tracking and guidance radar, instrumentation radar, intelligence surveillance radar, weather radar, vessel and air traffic control radar system, precision antenna, feed system and servo control system, high stability, multi-waveform transmitting system, various precision low noise receiving system, digital signal processing and data processing technology, signal simulator, display system, TV tracking system and automatic test system, computer applications including computer control, business management and simulation technique, network engineering, radar mechanical design, technology and quality control, microwave ferrite material and device, microwave mixed integrated circuit device, surface acoustic wave technology and device, broadcast transmitter and satellite communication station
中国航天科工集团北京无线电测量研究所-雷达、通讯、电子信息、综合系统，精密跟踪制导雷达、测量雷达；情报警戒雷达、气象雷达、空中及港口交通管制雷达系统工程；精密天线、馈线及控制伺服系统；高稳定性、多波形发射系统；高精度、低噪声接收系统；数字信号处理和数据处理技术；信号模拟、信号显示技术、电视跟踪、自动测试系统；计算机应用、控制、事务管理、仿真技术、网络工程；雷达结构、工艺和质量控制研究；微波铁氧体材料与器件；微波混合集成电路器件；声表面波技术与器件、广播发射机、卫星通讯站
The central bank in twice a month to relax monetary policy, the real estate market on the release of a clear signal of warm weather.
在每月两次央行放松货币政策，在温暖的天气明确的信号，发布房地产市场。
Also, the inclement weather adaptive traffic signal control is analyzed and researched.
另外，本文对恶劣天气信号控制进行了分析和研究。
Likewise, if you're deep inside a building as opposed to being out in the open, or if weather conditions limit the radio signal, the cellular base station will instruct the phone to transmit at a higher level.
同样，如果你在建筑物内，而不是漏天，或者如果天气条件限制了无线电信号那样，蜂窝基站将指示电话传输更高的水平。
It`s probably the satellite signal. It`s cloudy today. Something when the weather`s bad the signal`s not chear.
可能是卫星信号的关系，今天有云，有时当天气不好的时候，信号就不好。
Close by the pagoda was a signal mast from which a red lantern was suspended during stormy weather.
塔的旁边有一个信号杆，在暴风雨的天气里，杆上会被悬挂一个红灯笼来引导船只。
Jakarta -- Rescue teams have been dispatched after a commercial Adam Air passenger plane with more than 100 people onboard sent out a distress signal over Sulawesi island while flying in bad weather conditions, the transport minister said Monday.
雅加达-交通部部长周一称，亚当航空公司一架载有100名乘客的商用飞机在恶劣天气下飞行时，在苏拉威西岛上空发出求救信号，现已派遣救援小组展开搜救行动。
This paper described the technology of the GLC 12 type pulsed Doppler weather radar, system construction and the signal/data processing method.
阐述了 GL C- 12型脉冲多普勒天气雷达的技术与系统构成以及信号/数据处理的方法。
Analysis of Signal Processing Technology of Airborne Forward-looking Windshear Weather Radar System
机载前视风切变雷达信号处理方法分析
And then, this article deals with the design and implement of DMA interface-board used for data-transmission between terminal and signal processor in a certain weather radar, and gives its soft flow-chart and assemble program.
为此，本文介绍了用于某气象雷达计算机终端与信号处理之间高速数据传送的DMA接口支持板的设计思路和实现方法，并给出了软件流程图和汇编程序。
Cause Analysis of Weather Characteristics During Spring Sowing in 2000 in Qinzhou and Its Auspice Signal
钦州市2000年春播期天气特征成因分析及其前兆信号
Design and Realization of Control and Signal Processing Module on Weather Fax Receiver
气象传真机控制与信号处理模块的设计与实现
Tests and practical application results show that the communication between the PC and the automatic weather station signal simulator is reliable and stable and it meets the design requirements.
测试与实际应用结果表明，自动气象站信号模拟器和上位机之间可以可靠、稳定地实现通信。
Influence of Amplitude and Phase Imbalance of I/Q Channels on Spectrum Estimation of Weather Radar Signal
气象雷达正交通道幅相不平衡对谱估计的影响
In this paper, the influence of amplitude and phase imbalances of I/Q channels on spectrum estimation of weather radar echo signal is analyzed in detail and the simulation results by basic spectrum estimation methods of frequency and time domain is present.
详细分析了气象雷达中正交通道幅相不平衡对气象回波信号谱估计的影响，并给出基本的频域和时域估计法的仿真结果。
The signal condition of the traditional system is transmitted by long-distance lines, or collected and recorded data by workers at site. However, the long transmission lines can not only increase the cost, but also be easily influenced by different weather conditions.
传统的塔式起重机状态监测系统中状态信号使用导线进行长距离传输或者由工作人员直接到现场设备上进行采集，过长的传输线不仅使成本增加，而且很容易受到环境的影响。
In the algorithm, the boundary value of extinction is calculated by fitting Lidar return signal in cloudless weather.
该算法对于无云层天气条件，利用最小二乘法对回波信号直接进行全程拟合，获得大气消光系数的边界值；
In the open, because influence of weather and barrier, the sensors which working based on the physics domino offect will engender great measure error when they detect the signal of light, heat and electricity. It is inaccessibility to the request of application.
在野外由于天气情况和障碍物的影响，基于物理效应进行工作的物理传感器，当探测光、热、电等信号时将会产生很大的测量误差，很难达到应用的要求。
Then, we introduce the basic structure of PD weather radar signal processing system and their function of each subsystem, mainly including intermediate frequency receiver, clutter elimination, range correcting and smoothness, ambiguity resolution and spectrum estimation.
并在此基础上介绍了气象雷达信号处理系统的基本构成与各部分的主要功能，主要包括气象回波中频接收、杂波抑制、距离订正、平滑处理、解模糊和谱矩估计等。