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On determining spectral parameters, tracking jitter, and GPS positioning improvement by scintillation mitigation

A method of determining spectral parameters p (slope of the phase PSD) and T (phase PSD at 1 Hz) and hence tracking error variance in a GPS receiver PLL from just amplitude and phase scintillation indices and an estimated value of the Fresnel frequency has been previously presented. Here this method...

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Main Authors:	Strangeways, Hal J., Ho, Yih Hwa, Aquino, Marcio H. O., Elmas, Zeynep G., Marques, Haroldo Antonio, Monico, Joao Francisco Galera, H. A. Silva
Format:	Article
Language:	English
Published:	American Geophysical Union 2011
Subjects:	TK Electrical engineering. Electronics Nuclear engineering
Online Access:	http://eprints.utem.edu.my/id/eprint/3783/1/On_determining_spectral_parameters%2C_tracking_jitter%2C_and_GPS.pdf http://eprints.utem.edu.my/id/eprint/3783/ http://www.agu.org/journals/rs/
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id	my.utem.eprints.3783
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spelling	my.utem.eprints.37832023-07-05T12:32:26Z http://eprints.utem.edu.my/id/eprint/3783/ On determining spectral parameters, tracking jitter, and GPS positioning improvement by scintillation mitigation Strangeways, Hal J. Ho, Yih Hwa Aquino, Marcio H. O. Elmas, Zeynep G. Marques, Haroldo Antonio Monico, Joao Francisco Galera H. A. Silva TK Electrical engineering. Electronics Nuclear engineering A method of determining spectral parameters p (slope of the phase PSD) and T (phase PSD at 1 Hz) and hence tracking error variance in a GPS receiver PLL from just amplitude and phase scintillation indices and an estimated value of the Fresnel frequency has been previously presented. Here this method is validated using 50 Hz GPS phase and amplitude data from high latitude receivers in northern Norway and Svalbard. This has been done both using (1) a Fresnel frequency estimated using the amplitude PSD (in order to check the accuracy of the method) and (2) a constant assumed value of Fresnel frequency for the data set, convenient for the situation when contemporaneous phase PSDs are not available. Both of the spectral parameters ( p, T ) calculated using this method are in quite good agreement with those obtained by direct measurements of the phase spectrum as are tracking jitter variances determined for GPS receiver PLLs using these values. For the Svalbard data set, a significant difference in the scintillation level observed on the paths from different satellites received simultaneously was noted. Then, it is shown that the accuracy of relative GPS positioning can be improved by use of the tracking jitter variance in weighting the measurements from each satellite used in the positioning estimation. This has significant advantages for scintillation mitigation, particularly since the method can be accomplished utilizing only time domain measurements thus obviating the need for the phase PSDs in order to extract the spectral parameters required for tracking jitter determination. American Geophysical Union 2011 Article PeerReviewed text en http://eprints.utem.edu.my/id/eprint/3783/1/On_determining_spectral_parameters%2C_tracking_jitter%2C_and_GPS.pdf Strangeways, Hal J. and Ho, Yih Hwa and Aquino, Marcio H. O. and Elmas, Zeynep G. and Marques, Haroldo Antonio and Monico, Joao Francisco Galera and H. A. Silva (2011) On determining spectral parameters, tracking jitter, and GPS positioning improvement by scintillation mitigation. RADIO SCIENCE, 46. ISSN 0048–6604 http://www.agu.org/journals/rs/ 10.1029/2010RS004575
institution	Universiti Teknikal Malaysia Melaka
building	UTEM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknikal Malaysia Melaka
content_source	UTEM Institutional Repository
url_provider	http://eprints.utem.edu.my/
language	English
topic	TK Electrical engineering. Electronics Nuclear engineering
spellingShingle	TK Electrical engineering. Electronics Nuclear engineering Strangeways, Hal J. Ho, Yih Hwa Aquino, Marcio H. O. Elmas, Zeynep G. Marques, Haroldo Antonio Monico, Joao Francisco Galera H. A. Silva On determining spectral parameters, tracking jitter, and GPS positioning improvement by scintillation mitigation
description	A method of determining spectral parameters p (slope of the phase PSD) and T (phase PSD at 1 Hz) and hence tracking error variance in a GPS receiver PLL from just amplitude and phase scintillation indices and an estimated value of the Fresnel frequency has been previously presented. Here this method is validated using 50 Hz GPS phase and amplitude data from high latitude receivers in northern Norway and Svalbard. This has been done both using (1) a Fresnel frequency estimated using the amplitude PSD (in order to check the accuracy of the method) and (2) a constant assumed value of Fresnel frequency for the data set, convenient for the situation when contemporaneous phase PSDs are not available. Both of the spectral parameters ( p, T ) calculated using this method are in quite good agreement with those obtained by direct measurements of the phase spectrum as are tracking jitter variances determined for GPS receiver PLLs using these values. For the Svalbard data set, a significant difference in the scintillation level observed on the paths from different satellites received simultaneously was noted. Then, it is shown that the accuracy of relative GPS positioning can be improved by use of the tracking jitter variance in weighting the measurements from each satellite used in the positioning estimation. This has significant advantages for scintillation mitigation, particularly since the method can be accomplished utilizing only time domain measurements thus obviating the need for the phase PSDs in order to extract the spectral parameters required for tracking jitter determination.
format	Article
author	Strangeways, Hal J. Ho, Yih Hwa Aquino, Marcio H. O. Elmas, Zeynep G. Marques, Haroldo Antonio Monico, Joao Francisco Galera H. A. Silva
author_facet	Strangeways, Hal J. Ho, Yih Hwa Aquino, Marcio H. O. Elmas, Zeynep G. Marques, Haroldo Antonio Monico, Joao Francisco Galera H. A. Silva
author_sort	Strangeways, Hal J.
title	On determining spectral parameters, tracking jitter, and GPS positioning improvement by scintillation mitigation
title_short	On determining spectral parameters, tracking jitter, and GPS positioning improvement by scintillation mitigation
title_full	On determining spectral parameters, tracking jitter, and GPS positioning improvement by scintillation mitigation
title_fullStr	On determining spectral parameters, tracking jitter, and GPS positioning improvement by scintillation mitigation
title_full_unstemmed	On determining spectral parameters, tracking jitter, and GPS positioning improvement by scintillation mitigation
title_sort	on determining spectral parameters, tracking jitter, and gps positioning improvement by scintillation mitigation
publisher	American Geophysical Union
publishDate	2011
url	http://eprints.utem.edu.my/id/eprint/3783/1/On_determining_spectral_parameters%2C_tracking_jitter%2C_and_GPS.pdf http://eprints.utem.edu.my/id/eprint/3783/ http://www.agu.org/journals/rs/
_version_	1772815986851840000
score	13.211869

On determining spectral parameters, tracking jitter, and GPS positioning improvement by scintillation mitigation

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