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Research on Absolute Calibration of GNSS Receiver Delay through Clock-Steering Characterization

The receiver delay has a significant impact on global navigation satellite system (GNSS) time measurement. This article comprehensively analyzes the difficulty, composition, principle, and calculation of GNSS receiver delay. A universal method, based on clock-steering characterization, is proposed t...

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Autores principales: Zhu, Feng, Zhang, Huijun, Huang, Luxi, Li, Xiaohui, Feng, Ping
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7663689/
https://www.ncbi.nlm.nih.gov/pubmed/33113797
http://dx.doi.org/10.3390/s20216063
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author Zhu, Feng
Zhang, Huijun
Huang, Luxi
Li, Xiaohui
Feng, Ping
author_facet Zhu, Feng
Zhang, Huijun
Huang, Luxi
Li, Xiaohui
Feng, Ping
author_sort Zhu, Feng
collection PubMed
description The receiver delay has a significant impact on global navigation satellite system (GNSS) time measurement. This article comprehensively analyzes the difficulty, composition, principle, and calculation of GNSS receiver delay. A universal method, based on clock-steering characterization, is proposed to absolutely calibrate all types of receivers. We use a hardware simulator to design several experiments to test the performance of GNSS receiver delay for different receiver types, radio frequency (RF) signals, operation status and time-to-phase (TtP). At first, through the receivers of Novatel and Septentrio, the channel delay of Septentrio is 2 ns far lower than 65 ns for Novatel, and for the inter-frequency bias of GLONASS L1, Septentrio tends to increase within 10 ns compared with decreasing of Novatel within 5 ns. Secondly, a representative receiver of UniNav-BDS (BeiDou) is chosen to test the influence of Ttp which may be ignored by users. Under continuous operation, the receiver delay shows a monotone reduction of 10 ns as TtP increased by 10 ns. However, under on-off operation, the receiver delay represents periodic variation. Through a zero-baseline comparison, we verifies the relation between receiver delay and TtP. At last, the article analyzes instrument errors and measurement errors in the experiment, and the combined uncertainty of absolute calibration is calculated with 1.36 ns.
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spelling pubmed-76636892020-11-14 Research on Absolute Calibration of GNSS Receiver Delay through Clock-Steering Characterization Zhu, Feng Zhang, Huijun Huang, Luxi Li, Xiaohui Feng, Ping Sensors (Basel) Article The receiver delay has a significant impact on global navigation satellite system (GNSS) time measurement. This article comprehensively analyzes the difficulty, composition, principle, and calculation of GNSS receiver delay. A universal method, based on clock-steering characterization, is proposed to absolutely calibrate all types of receivers. We use a hardware simulator to design several experiments to test the performance of GNSS receiver delay for different receiver types, radio frequency (RF) signals, operation status and time-to-phase (TtP). At first, through the receivers of Novatel and Septentrio, the channel delay of Septentrio is 2 ns far lower than 65 ns for Novatel, and for the inter-frequency bias of GLONASS L1, Septentrio tends to increase within 10 ns compared with decreasing of Novatel within 5 ns. Secondly, a representative receiver of UniNav-BDS (BeiDou) is chosen to test the influence of Ttp which may be ignored by users. Under continuous operation, the receiver delay shows a monotone reduction of 10 ns as TtP increased by 10 ns. However, under on-off operation, the receiver delay represents periodic variation. Through a zero-baseline comparison, we verifies the relation between receiver delay and TtP. At last, the article analyzes instrument errors and measurement errors in the experiment, and the combined uncertainty of absolute calibration is calculated with 1.36 ns. MDPI 2020-10-25 /pmc/articles/PMC7663689/ /pubmed/33113797 http://dx.doi.org/10.3390/s20216063 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Zhu, Feng
Zhang, Huijun
Huang, Luxi
Li, Xiaohui
Feng, Ping
Research on Absolute Calibration of GNSS Receiver Delay through Clock-Steering Characterization
title Research on Absolute Calibration of GNSS Receiver Delay through Clock-Steering Characterization
title_full Research on Absolute Calibration of GNSS Receiver Delay through Clock-Steering Characterization
title_fullStr Research on Absolute Calibration of GNSS Receiver Delay through Clock-Steering Characterization
title_full_unstemmed Research on Absolute Calibration of GNSS Receiver Delay through Clock-Steering Characterization
title_short Research on Absolute Calibration of GNSS Receiver Delay through Clock-Steering Characterization
title_sort research on absolute calibration of gnss receiver delay through clock-steering characterization
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7663689/
https://www.ncbi.nlm.nih.gov/pubmed/33113797
http://dx.doi.org/10.3390/s20216063
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