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Simulating Imaging of Large Scale Radio Arrays on the Lunar Surface
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A celestial assisted INS initialization method for lunar explorers.

Xiaolin Ning1, Longhua Wang, Weiren Wu

  • 1School of Instrumentation Science & Opto-electronics Engineering, BeiHang University (BUAA), Beijing 100191, China. ningxiaolin@buaa.edu.cn

Sensors (Basel, Switzerland)
|December 14, 2011
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Summary
This summary is machine-generated.

A new method combines celestial and inertial navigation systems for accurate lunar exploration. This approach enhances initialization and calibration, improving navigation precision for Moon missions.

Keywords:
autonomous initializationcelestial navigationinertial navigationlunar exploration

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Area of Science:

  • Space exploration
  • Navigation systems
  • Robotics

Background:

  • The Chinese Lunar Exploration Program (CLEP) requires autonomous navigation for Moon landing, surface exploration, and sample return.
  • Inertial Navigation Systems (INS) and Celestial Navigation Systems (CNS) are crucial for lunar missions but have limitations.
  • Accurate INS initialization and CNS calibration are essential for high navigation precision on the lunar surface.

Purpose of the Study:

  • To develop a combined navigation method to overcome limitations of individual INS and CNS.
  • To present a novel celestial-assisted INS initialization technique.
  • To improve the accuracy of autonomous navigation for lunar explorers.

Main Methods:

  • A new method integrates INS and CNS for autonomous navigation.
  • Celestial measurements are used to aid INS, estimating initial position, attitude, and sensor biases.
  • INS measurements are utilized to correct systematic errors in the CNS.

Main Results:

  • Simulations demonstrated a maximum position error of 300 meters.
  • Simulations showed a maximum attitude error of 40 arcseconds.
  • The combined system effectively addresses INS initialization and CNS calibration challenges.

Conclusions:

  • The celestial-assisted INS initialization method is a promising approach for lunar surface navigation.
  • Combining INS and CNS provides complementary benefits, enhancing overall navigation accuracy.
  • This integrated navigation scheme supports the goals of advanced lunar exploration missions.