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相关概念视频

Field Application of Global Positioning System01:28

Field Application of Global Positioning System

46
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...
46
Errors in Global Positioning System01:26

Errors in Global Positioning System

46
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,...
46
Introduction to Global Positioning System01:30

Introduction to Global Positioning System

61
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,...
61
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

58
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...
58
Interference: Path Lengths01:10

Interference: Path Lengths

1.3K
Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
1.3K
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

35
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...
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相关实验视频

Updated: Jul 5, 2025

Implementation of a Reference Interferometer for Nanodetection
16:11

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Published on: April 26, 2014

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软件定义的无线电用于GNSS 无线电频率干扰定位定位

Fred Taylor1, Evan Gattis1, Lucca Trapani1

  • 1Ann and H.J. Smead Aerospace Engineering Sciences, University of Colorado Boulder, Boulder, CO 80303, USA.

Sensors (Basel, Switzerland)
|January 11, 2024
PubMed
概括

像KrakenSDR这样的新型低成本无线电硬件显示了全球导航卫星系统 (GNSS) 干扰检测的前景. 测试证实了其相连贯性和到达角度能力,以提高GNSS信号安全性.

关键词:
全球定位系统 (GPS) 是一个全球定位系统.无线电方向查找 寻找方向软件定义无线电 (SDR)

更多相关视频

Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
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Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar

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Calibration of Vector Network Analyzer for Measurements in Radio Frequency Propagation Channels
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Calibration of Vector Network Analyzer for Measurements in Radio Frequency Propagation Channels

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相关实验视频

Last Updated: Jul 5, 2025

Implementation of a Reference Interferometer for Nanodetection
16:11

Implementation of a Reference Interferometer for Nanodetection

Published on: April 26, 2014

9.4K
Tracking Infiltration Front Depth Using Time-lapse Multi-offset Gathers Collected with Array Antenna Ground Penetrating Radar
07:14

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Calibration of Vector Network Analyzer for Measurements in Radio Frequency Propagation Channels
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科学领域:

  • 无线电频率工程 无线电频率工程
  • 信号处理 信号处理
  • 导航系统 导航系统

背景情况:

  • 全球导航卫星系统 (GNSS) 频段的有害干扰是一个持续的挑战.
  • 商用现成 (COTS) 无线电硬件的进步为干扰检测提供了新的解决方案.
  • 阶段连贯接收平台为改进GNSS信号监控提供了潜力.

研究的目的:

  • 测试和描述KrakenSDR,一个低成本,紧,相连接接收平台.
  • 评估KrakenSDR适用于全球导航卫星系统 (GNSS) 应用的适用性,特别是干扰识别.
  • 评估到达角 (AoA) 估计和相关指标的性能.

主要方法:

  • 对KrakenSDR平台进行了基板和现场测试.
  • 阶段一致性和AoA估计精度的表征.
  • 对接收信号强度指标 (RSSI) 和AoA信心值的分析.
  • 在900 MHz和1575.42 MHz (GNSS L1频段) 进行测试.

主要成果:

  • 克拉肯SDR在数组依赖的分辨率范围内证明了相连贯性和AoA估计.
  • RSSI和AoA的信心值与AoA估计质量有很强的相关性.
  • 该平台证明能够在GNSS频率上运行.

结论:

  • 克拉肯SDR是一个可行的,低成本的平台,用于GNSS干扰检测和信号监控.
  • 它的性能指标为信号质量和方向提供了宝贵的见解.
  • 活跃天线阵列的校准对于GNSS信号采集中准确的AoA估计至关重要.