基于移动窗口全球搜索方法的GPS/BDS三频循环滑动检测和修复
1School of Engineering, Yunnan College of Business Management, Kunming, 650500, China.
Scientific reports
|March 20, 2024
概括
本研究介绍了一种有效的方法来检测和修复全球导航卫星系统 (GNSS) 循环滑落,使用来自GPS和BDS卫星的三倍频数据. 新方法显著提高了卫星导航定位的准确性和可靠性.
科学领域:
- 地质测量和地质数学
- 卫星导航系统 卫星导航系统
背景情况:
- 准确的全球导航卫星系统 (GNSS) 数据处理依赖于精确的循环滑动检测和修复.
- 全球定位系统 (GPS) 和北斗导航卫星系统 (BDS) 的三频观测比双频系统提供了增强的能力.
研究的目的:
- 开发和验证一种新的移动窗口全球搜索方法,用于检测和修复GNSS数据中的三次频循环滑落.
- 通过解决循环滑坡模两可的问题,提高GNSS定位的准确性和可靠性.
主要方法:
- 一个移动窗口的全球搜索算法,利用无几何 (GF) 模型和结合系数来减轻电离层效应.
- 采用"三西格玛"标准用于范围约束,并更新周期滑动估计移动窗口内的标准偏差.
- 全球搜索策略,以识别和纠正三次频循环滑动,避免多值问题.
主要成果:
- 提出的方法成功地确定了五个实验数据集的三倍频循环滑动的位置和大小.
- 实现了高的检测成功率:GPS的98.0-100.0%,BDS的92.0-100.0%.
- 已证明GPS的平均检测率为99.2%,BDS的平均检测率为96.7%,超过了直接圆形化方法,并且在2个周期内对滑动有效.
结论:
- 移动窗口全球搜索方法为三次频率GNSS循环滑落检测和修复提供了强大而准确的解决方案.
- 与现有方法相比,这种技术在可靠性和准确性方面提供了显著的改进,特别是对于小型循环滑动.
- 该研究验证了三次频观测在提高GNSS数据处理精度方面的有效性.
相关概念视频
01:26Errors 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
01:28Field 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
01:30Types 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
01:30Introduction 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
01:30Design 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
01:02Long-patch Base Excision Repair
7.0K
Since the discovery of the two BER pathways, there has been a debate about how a cell chooses one pathway over the other and the factors determining this selection. Numerous in vitro experiments have pointed out multiple determinants for the sub-pathway selection. These are:
7.0K