International Journal of Aeronautical and Space Sciences

The Korean Society for Aeronautical and Space Sciences (한국항공우주학회)
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Navigation Augmentation in Urban Area by HALE UAV with Onboard Pseudolite during Multi-Purpose Missions

  • Kim, O-Jong (Mechanical and Aerospace Engineering and SNU-IAMD, Seoul National University) ;
  • Yu, Sunkyoung (Mechanical and Aerospace Engineering and SNU-IAMD, Seoul National University) ;
  • No, Heekwon (Mechanical and Aerospace Engineering and SNU-IAMD, Seoul National University) ;
  • Kee, Changdon (Mechanical and Aerospace Engineering and SNU-IAMD, Seoul National University) ;
  • Choi, Minwoo (Republic of Korea Air Force) ;
  • Seok, Hyojeong (Unmmaned Vehicle Advanced Research Center, Korea Aerospace Research Institute) ;
  • Yoon, Donghwan (Telecommunications Technology Association) ;
  • Park, Byungwoon (Mechanical and Aerospace Engineering, Sejong University) ;
  • Jee, Cheolkyu (Agency for Defense Development)
  • Received : 2015.03.30
  • Accepted : 2017.09.26
  • Published : 2017.09.30
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Abstract

Among various applications of the High Altitude Long Endurance (HALE) Unmanned Aerial Vehicle (UAV), this paper has a focus on the Global Positioning System (GPS) utilizing pseudolite and its improved performance, particularly during the multi-purpose missions. In a multi-purpose mission, the HALE UAV follows a specified flight trajectory for both navigation applications and missions. Some of the representative HALE missions are remote exploration, surveillance, reconnaissance, and communication relay. During these operations, the HALE UAV can also be an additional positioning signal source as it broadcast signals using pseudolite. The pseudolite signal can improve the availability, accuracy, and reliability of the GPS particularly in areas with poor signal reception, such as shadowed regions between tall buildings. The improvement in performance of navigation is validated through simulations of multi-purpose missions of the solar-powered HALE UAV in an urban canyon. The simulation includes UAV trajectory generation at stratosphere and uses actual geographical building data. The results indicate that the pseudolite-equipped HALE UAV has the potential to enhance the performance of the satellite navigation system in navigationally degraded regions even during multi-purpose operations.

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References

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