A preliminary study on UAS vertical NSE analysis in urban-like environments

UAS navigational error is one of the concerns leading to non-conformance of assigned flight volume. This is especially noticeable in urban environment where global navigation satellite system (GNSS) positioning capability are affected by influencing factors such as signal blockage and multipath erro...

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Main Authors: Deng, Chao, Wang, John Chung-Hung, Low, Kin Huat
Other Authors: School of Mechanical and Aerospace Engineering
Format: Conference or Workshop Item
Language:English
Published: 2022
Subjects:
NSE
Online Access:https://hdl.handle.net/10356/160567
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1605672022-09-08T05:05:01Z A preliminary study on UAS vertical NSE analysis in urban-like environments Deng, Chao Wang, John Chung-Hung Low, Kin Huat School of Mechanical and Aerospace Engineering 2022 Integrated Communication, Navigation and Surveillance Conference (ICNS) Air Traffic Management Research Institute Engineering::Aeronautical engineering::Air navigation Engineering::Aeronautical engineering Unmanned Aerial Systems Drone Navigation Urban Environment Vertical Direction NSE UAS navigational error is one of the concerns leading to non-conformance of assigned flight volume. This is especially noticeable in urban environment where global navigation satellite system (GNSS) positioning capability are affected by influencing factors such as signal blockage and multipath errors caused by surrounding objects like buildings, trees, and other obstructions [1]. This paper presents a study on how the vertical navigation performance is affected by the cause of change in the sky openness ratio (i.e., GNSS signal blockage) above the drone when a self-built UAS is operating near several types of urban obstructions in flight tests. Test sites are carefully selected to ensure they are representative to urban environments, which includes 1) open space carpark with a few short trees, 2) running parallel to row of buildings, 3) surrounded by buildings (narrow urban canyon), and 4) constraint area with a building and some tall trees. The data will be analysed to obtain the vertical position error with considerations for (i) Number of visible satellites versus flight altitude, (ii) Sensor-reported vertical co-variance (EPV), (iii) Vertical position errors at various locations by comparing the reported position (GNSS) to a reference value, and (iv) Factors contributing to vertical positional errors at various locations, (v) The influence of sky openness to the vertical position error. The measurement of sky-openness ratio is to determine whether 3D city model of the flight area is sufficient to predict the vertical navigation performance that could be expected. Civil Aviation Authority of Singapore (CAAS) National Research Foundation (NRF) This research is supported by the National Research Foundation, Singapore, and the Civil Aviation Authority of Singapore, under the Aviation Transformation Programme. 2022-09-08T05:05:01Z 2022-09-08T05:05:01Z 2022 Conference Paper Deng, C., Wang, J. C. & Low, K. H. (2022). A preliminary study on UAS vertical NSE analysis in urban-like environments. 2022 Integrated Communication, Navigation and Surveillance Conference (ICNS), 1-9. https://dx.doi.org/10.1109/ICNS54818.2022.9771539 https://hdl.handle.net/10356/160567 10.1109/ICNS54818.2022.9771539 1 9 en © 2022 IEEE. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Aeronautical engineering::Air navigation
Engineering::Aeronautical engineering
Unmanned Aerial Systems
Drone
Navigation
Urban Environment
Vertical Direction
NSE
spellingShingle Engineering::Aeronautical engineering::Air navigation
Engineering::Aeronautical engineering
Unmanned Aerial Systems
Drone
Navigation
Urban Environment
Vertical Direction
NSE
Deng, Chao
Wang, John Chung-Hung
Low, Kin Huat
A preliminary study on UAS vertical NSE analysis in urban-like environments
description UAS navigational error is one of the concerns leading to non-conformance of assigned flight volume. This is especially noticeable in urban environment where global navigation satellite system (GNSS) positioning capability are affected by influencing factors such as signal blockage and multipath errors caused by surrounding objects like buildings, trees, and other obstructions [1]. This paper presents a study on how the vertical navigation performance is affected by the cause of change in the sky openness ratio (i.e., GNSS signal blockage) above the drone when a self-built UAS is operating near several types of urban obstructions in flight tests. Test sites are carefully selected to ensure they are representative to urban environments, which includes 1) open space carpark with a few short trees, 2) running parallel to row of buildings, 3) surrounded by buildings (narrow urban canyon), and 4) constraint area with a building and some tall trees. The data will be analysed to obtain the vertical position error with considerations for (i) Number of visible satellites versus flight altitude, (ii) Sensor-reported vertical co-variance (EPV), (iii) Vertical position errors at various locations by comparing the reported position (GNSS) to a reference value, and (iv) Factors contributing to vertical positional errors at various locations, (v) The influence of sky openness to the vertical position error. The measurement of sky-openness ratio is to determine whether 3D city model of the flight area is sufficient to predict the vertical navigation performance that could be expected.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Deng, Chao
Wang, John Chung-Hung
Low, Kin Huat
format Conference or Workshop Item
author Deng, Chao
Wang, John Chung-Hung
Low, Kin Huat
author_sort Deng, Chao
title A preliminary study on UAS vertical NSE analysis in urban-like environments
title_short A preliminary study on UAS vertical NSE analysis in urban-like environments
title_full A preliminary study on UAS vertical NSE analysis in urban-like environments
title_fullStr A preliminary study on UAS vertical NSE analysis in urban-like environments
title_full_unstemmed A preliminary study on UAS vertical NSE analysis in urban-like environments
title_sort preliminary study on uas vertical nse analysis in urban-like environments
publishDate 2022
url https://hdl.handle.net/10356/160567
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