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Research on Improving Satellite Positioning Precision Based on Multi-Frequency Navigation Signals.

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  • 1National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China.

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Using multiple navigation signals significantly enhances satellite positioning precision. This method reduces positioning errors by a factor of k when using k frequencies, offering improved accuracy for receivers.

Keywords:
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Area of Science:

  • Satellite Navigation Systems
  • Geomatics Engineering
  • Signal Processing

Background:

  • Improving satellite positioning accuracy is crucial for navigation systems.
  • Current methods focus on constellation optimization and residual reduction.
  • Multi-frequency signals offer a potential avenue for enhanced precision.

Purpose of the Study:

  • To present a novel method for improving satellite positioning precision.
  • To investigate the impact of multi-frequency navigation signals on positioning accuracy.
  • To provide theoretical support and data for future satellite positioning research.

Main Methods:

  • Utilizing multi-frequency navigation signals from CAPS and GPS systems.
  • Simulating experiments with varying numbers of downlink frequencies.
  • Calculating root mean square (RMS) of positioning error, improvement percentage, and standard deviation.

Main Results:

  • Positioning error RMS decreases proportionally with the number of frequencies used.
  • With k descending frequencies, the 3D RMS positioning error is 1/k of the single-frequency error.
  • Experimental results validate theoretical derivations on precision improvement.

Conclusions:

  • Multi-frequency navigation signals effectively enhance satellite positioning precision.
  • The proposed method offers a significant improvement over single-frequency approaches.
  • This research provides valuable data and theoretical backing for future satellite positioning advancements.