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相关概念视频

Errors in Global Positioning System01:26

Errors in Global Positioning System

44
Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
44
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

45
The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
45
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

55
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
55
Introduction to Global Positioning System01:30

Introduction to Global Positioning System

59
The Global Positioning System (GPS) revolutionized positioning on Earth, providing precise location data through satellite ranging. The GPS system was developed in 1978 by the U.S. Department of Defense  for military use, and it became available for civilian applications in 1983, transforming fields including navigation, fleet management, and time synchronization for telecommunications systems.GPS consists of satellites in medium Earth orbit, about 20,200 kilometers above the surface,...
59
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

30
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
30

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相关实验视频

Updated: Jul 1, 2025

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
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基于GNSS多路径信号的飞行目标检测技术

Pengfei Zhu1, Qinglin Zhu1, Xiang Dong1

  • 1China Research Institute of Radiowave Propagation, Qingdao 266107, China.

Sensors (Basel, Switzerland)
|March 13, 2024
PubMed
概括

这项研究引入了一种新的被动雷达系统,用于检测飞行目标. 这种轻量级,低成本的系统有效地使用全球导航卫星系统信号跟踪飞机,克服了传统雷达的局限性.

科学领域:

  • 雷达系统工程 雷达系统工程
  • 航空航天工程 航空航天工程
  • 信号处理 信号处理

背景情况:

  • 传统的飞行目标探测系统面临着大尺寸,高功耗,复杂性和较差的战场生存能力.
  • 现有的系统经常丢弃多路径信号,这对于检测和定位可能是有价值的.

研究的目的:

  • 开发一种新的被动雷达系统,用于检测飞行目标.
  • 解决传统雷达系统在尺寸,功率,复杂性和生存能力方面的局限性.
  • 为了利用多路径信号和全球导航卫星系统 (GNSS) 信号来增强目标检测.

主要方法:

  • 开发一种使用GNSS多路径信号的被动雷达系统.
  • 通过整合支持信息和多源GNSS信号特征来提高目标检测.
  • 通过实验验证,以评估系统在定位飞机和获得飞行轨迹方面的能力.

主要成果:

  • 开发的被动雷达系统成功地定位了一架客机,并确定了它的飞行轨迹.
  • 该系统仅使用单个GNSS接收天线实现了这一目标.
  • 该系统展示了轻量化设计 (<5公斤),低功耗,简单性和便携性.

结论:

关键词:
在GNSS中使用GNSS.飞行目标的飞行目标.多路径效应的多路径效应.无源雷达是一种被动雷达.

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  • 无源雷达系统为24/7全天候飞行目标检测提供了具有成本效益,便携性和强大的解决方案.
  • 它的特性使其适合大规模部署,表明有很大的发展潜力.
  • 这项技术为传统雷达系统提供了可行的替代方案,特别是在资源有限或敏感的环境中.