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Optimal Divergence-Free Hatch Filter for GNSS Single-Frequency Measurement
The Hatch filter is a code-smoothing technique that uses the variation of the carrier phase. It can effectively reduce the noise of a pseudo-range with a very simple filter construction, but it occasionally causes an ionosphere-induced error for low-lying satellites. Herein, we propose an optimal si...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5375734/ https://www.ncbi.nlm.nih.gov/pubmed/28245584 http://dx.doi.org/10.3390/s17030448 |
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author | Park, Byungwoon Lim, Cheolsoon Yun, Youngsun Kim, Euiho Kee, Changdon |
author_facet | Park, Byungwoon Lim, Cheolsoon Yun, Youngsun Kim, Euiho Kee, Changdon |
author_sort | Park, Byungwoon |
collection | PubMed |
description | The Hatch filter is a code-smoothing technique that uses the variation of the carrier phase. It can effectively reduce the noise of a pseudo-range with a very simple filter construction, but it occasionally causes an ionosphere-induced error for low-lying satellites. Herein, we propose an optimal single-frequency (SF) divergence-free Hatch filter that uses a satellite-based augmentation system (SBAS) message to reduce the ionospheric divergence and applies the optimal smoothing constant for its smoothing window width. According to the data-processing results, the overall performance of the proposed filter is comparable to that of the dual frequency (DF) divergence-free Hatch filter. Moreover, it can reduce the horizontal error of 57 cm to 37 cm and improve the vertical accuracy of the conventional Hatch filter by 25%. Considering that SF receivers dominate the global navigation satellite system (GNSS) market and that most of these receivers include the SBAS function, the filter suggested in this paper is of great value in that it can make the differential GPS (DGPS) performance of the low-cost SF receivers comparable to that of DF receivers. |
format | Online Article Text |
id | pubmed-5375734 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-53757342017-04-10 Optimal Divergence-Free Hatch Filter for GNSS Single-Frequency Measurement Park, Byungwoon Lim, Cheolsoon Yun, Youngsun Kim, Euiho Kee, Changdon Sensors (Basel) Article The Hatch filter is a code-smoothing technique that uses the variation of the carrier phase. It can effectively reduce the noise of a pseudo-range with a very simple filter construction, but it occasionally causes an ionosphere-induced error for low-lying satellites. Herein, we propose an optimal single-frequency (SF) divergence-free Hatch filter that uses a satellite-based augmentation system (SBAS) message to reduce the ionospheric divergence and applies the optimal smoothing constant for its smoothing window width. According to the data-processing results, the overall performance of the proposed filter is comparable to that of the dual frequency (DF) divergence-free Hatch filter. Moreover, it can reduce the horizontal error of 57 cm to 37 cm and improve the vertical accuracy of the conventional Hatch filter by 25%. Considering that SF receivers dominate the global navigation satellite system (GNSS) market and that most of these receivers include the SBAS function, the filter suggested in this paper is of great value in that it can make the differential GPS (DGPS) performance of the low-cost SF receivers comparable to that of DF receivers. MDPI 2017-02-24 /pmc/articles/PMC5375734/ /pubmed/28245584 http://dx.doi.org/10.3390/s17030448 Text en © 2017 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 Park, Byungwoon Lim, Cheolsoon Yun, Youngsun Kim, Euiho Kee, Changdon Optimal Divergence-Free Hatch Filter for GNSS Single-Frequency Measurement |
title | Optimal Divergence-Free Hatch Filter for GNSS Single-Frequency Measurement |
title_full | Optimal Divergence-Free Hatch Filter for GNSS Single-Frequency Measurement |
title_fullStr | Optimal Divergence-Free Hatch Filter for GNSS Single-Frequency Measurement |
title_full_unstemmed | Optimal Divergence-Free Hatch Filter for GNSS Single-Frequency Measurement |
title_short | Optimal Divergence-Free Hatch Filter for GNSS Single-Frequency Measurement |
title_sort | optimal divergence-free hatch filter for gnss single-frequency measurement |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5375734/ https://www.ncbi.nlm.nih.gov/pubmed/28245584 http://dx.doi.org/10.3390/s17030448 |
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