用人工智能为低地球轨道卫星提供多普勒天气概况
Ekta Sharma1, Ravinesh C Deo1, Christopher P Davey1
1Artificial Intelligence Applications Laboratory, School of Mathematics, Physics and Computing, University of Southern Queensland, Springfield, QLD 4300, Australia.
Sensors (Basel, Switzerland)
|August 29, 2024
概括
这项研究通过使用人工智能来预测多普勒效应来增强低地球轨道 (LEO) 卫星物联网 (IoT) 服务,实现超过91%的数据包交付率. 混合IIS-LSTM模型显示了LEO卫星通信的卓越准确性和效率.
科学领域:
- 卫星通信 卫星通信
- 物联网 (IoT) 的物联网 (IoT) 的物联网.
- 太空系统中的人工智能
背景情况:
- 低地球轨道 (LEO) 卫星为全球物联网 (IoT) 服务提供了有前途的基础设施.
- 远程 (LoRa) 调制中的多普勒效应对LEO卫星系统的上行连接构成了重大挑战.
- 现有的方法需要改进,以应对多普勒天气效应影响LEO卫星运营效率的复杂性.
研究的目的:
- 关于多普勒天气效应,全面检查LEO卫星的运行效率.
- 开发和评估先进的人工智能技术,以预测和减轻多普勒相关的挑战.
- 为了比较一种新的混合IIS-LSTM模型与已建立的AI模型 (如CNN和XGBoost) 的性能.
主要方法:
- 使用地面雷达追踪全球星和国际空间站 (ISS) LEO卫星星座.
- 模拟卫星星座,计算延迟和频率偏移.
- 设计和实施混合代输入选择-长期短期记忆网络 (IIS-LSTM) 模型,用于多普勒天气预测.
主要成果:
- 在Globalstar (11.5 MHz) 和ISS NAUKA (145.8 MHz) 实现了超过91%的数据包交付率,传播系数为12.
- IIS-LSTM模型显示出高精度 (97.51%) 和效率,特别是在较低的信号噪声比 (SNR) 条件下.
- 对于较低的SNR,IIS-LSTM模型实现了大约0.4651s的计算时间,在这个场景中表现优于CNN和XGBoost.
结论:
- 开发的IIS-LSTM模型有效地预测多普勒天气概况,显著提高了物联网服务的LEO卫星通信效率.
- 混合人工智能方法为缓解LEO卫星网络中多普勒效应挑战提供了强大的解决方案.
- 建议进一步研究将大气衰减和其他空间参数纳入LoRa多普勒分析.
相关概念视频
Doppler Effect - II
3.4K
The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
3.4K
Doppler Effect - I
3.5K
The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...
3.5K
Types of Global Positioning System Surveys
53
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...
53
Circular Orbits and Critical Velocity for Satellites
2.9K
The Moon orbits around the Earth. In turn, the Earth (and other planets) orbit the Sun. The space directly above our atmosphere is filled with artificial satellites in orbit. One can examine the circular orbit, the simplest kind of orbit, to understand the relationship between the speed and the period of planets and satellites with respect to their positions and the bodies that they orbit.
Nicolaus Copernicus (1473-1543) first suggested that the Earth and all other planets orbit the Sun in...
Nicolaus Copernicus (1473-1543) first suggested that the Earth and all other planets orbit the Sun in...
2.9K
Precipitation Gravimetry
5.5K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
5.5K
Influence of Earth's Curvature and Atmospheric Refraction on Leveling
71
During leveling, the Earth's curvature and atmospheric refraction introduce deviations in the line of sight from a true horizontal reference. When the line of sight is leveled, it remains perpendicular to the plumb line only at a single point. Beyond this, it deviates due to the Earth’s curvature, represented by the correction C. For a sight distance D, the deviation can be derived using the relationship:This relationship shows that the deviation increases quadratically with distance.
71


