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相关概念视频

Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

83
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...
83
Errors in Global Positioning System01:26

Errors in Global Positioning System

74
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,...
74
Distance Measurements by Taping01:18

Distance Measurements by Taping

71
Tapes are essential in surveying for accurate, durable, and short-distance measurements. Made from lightweight, nylon-coated steel, they offer flexibility and strength for rugged outdoor use. The nylon coating protects against rust and wear, extending the tape's life. Standard lengths, around 30 meters, are marked in meters and millimeters for precision.Surveyors select tapes based on site conditions and accuracy needs. Lightweight, nylon-coated tapes are commonly used for ease of handling and...
71
Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview01:13

Attenuated Total Reflectance (ATR) Infrared Spectroscopy: Overview

429
Attenuated total reflectance (ATR) infrared spectroscopy is a powerful analytical technique used to study the composition of materials. It is widely employed in chemistry, materials science, forensic science, and other fields where sample characterization is required. ATR has several advantages over traditional transmission IR spectroscopy, including the requirement of little to no sample preparation and the ability to analyze a wide range of samples.
The ATR process begins by directing a beam...
429
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

70
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...
70

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相关实验视频

Updated: Jul 24, 2025

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
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在杂乱中使用范围和距离测量的被动雷达跟踪.

Asma Asif1, Sithamparanathan Kandeepan1, Robin J Evans2

  • 1School of Engineering, RMIT University, Melbourne 3000, Australia.

Sensors (Basel, Switzerland)
|July 8, 2023
PubMed
概括

这项研究引入了一种带有概率数据关联 (UKF-PDA) 的无气味卡尔曼波器,用于在被动双向雷达中增强3D目标跟踪. UKF-PDA方法有效地减少了偏差,并提高了跟踪准确性,即使轴承数据有限.

科学领域:

  • 雷达系统工程 雷达系统工程
  • 信号处理 信号处理
  • 估计理论 估计理论

背景情况:

  • 精确的3D目标跟踪对于被动双向式雷达系统至关重要.
  • 传统的扩展卡尔曼波器 (EKF) 方法表现出缺少或不良轴承数据的偏差.
  • 无线性非线性在被动比斯塔特雷达跟踪需要先进的过技术.

研究的目的:

  • 开发一个强大的3D目标跟踪算法,用于被动双向雷达.
  • 为了减轻传统EKF方法在具有不完整轴承信息的场景中引入的偏差.
  • 通过范围和距离率测量,在混乱的环境中提高跟踪性能.

主要方法:

  • 实施无气味卡尔曼波器 (UKF) 来解决3D跟踪中的非线性问题.
  • 将概率数据协会 (PDA) 算法与UKF集成,以管理环境杂乱.
  • 使用范围和范围率测量用于状态估计.

主要成果:

  • 拟议的UKF-PDA框架成功地减少了估计偏差.
  • 通过模拟,在3D目标跟踪准确度方面取得了显著的改进.
  • 该方法显示了在处理缺失或低质量的轴承数据方面的增强能力.
关键词:
偏见 偏见 偏见 偏见 偏见扩展的卡尔曼过器无源雷达是一种被动雷达.可能性数据关联概率数据关联.没有香味的卡尔曼过器.

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结论:

  • UKF-PDA方法为被动比斯塔特雷达跟踪提供了一个优越的替代传统EKF.
  • 这一框架显著提升了被动比斯塔特雷达目标追踪能力的最先进状态.
  • 拟议的方法提供了一个强大的解决方案,用于在具有挑战性的雷达环境中准确的3D跟踪.