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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Amer Geophysical Union
2014
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ftunivesp:oai:acervodigital.unesp.br:11449/6664 2023-05-15T17:43:34+02:00 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, H. A. Galera Monico, J. F. Silva, H. A. Universidade Estadual Paulista (UNESP) 2014-05-20T13:22:37Z http://acervodigital.unesp.br/handle/11449/6664 http://hdl.handle.net/11449/6664 https://doi.org/10.1029/2010RS004575 eng eng Amer Geophysical Union Radio Science Radio Science. Washington: Amer Geophysical Union, v. 46, p. 14, 2011. 0048-6604 http://hdl.handle.net/11449/6664 http://acervodigital.unesp.br/handle/11449/6664 doi:10.1029/2010RS004575 WOS:000293641200003 http://dx.doi.org/10.1029/2010RS004575 info:eu-repo/semantics/closedAccess outro 2014 ftunivesp https://doi.org/10.1029/2010RS004575 2021-07-18T08:23:03Z 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. Other/Unknown Material Northern Norway Svalbard Universidade Estadual Paulista São Paulo: Acervo Digital da UNESP / São Paulo State University Norway Svalbard Radio Science 46 6 |
institution |
Open Polar |
collection |
Universidade Estadual Paulista São Paulo: Acervo Digital da UNESP / São Paulo State University |
op_collection_id |
ftunivesp |
language |
English |
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. |
author2 |
Universidade Estadual Paulista (UNESP) |
format |
Other/Unknown Material |
author |
Strangeways, Hal J. Ho, Yih-Hwa Aquino, Marcio H. O. Elmas, Zeynep G. Marques, H. A. Galera Monico, J. F. Silva, H. A. |
spellingShingle |
Strangeways, Hal J. Ho, Yih-Hwa Aquino, Marcio H. O. Elmas, Zeynep G. Marques, H. A. Galera Monico, J. F. Silva, H. A. On determining spectral parameters, tracking jitter, and GPS positioning improvement by scintillation mitigation |
author_facet |
Strangeways, Hal J. Ho, Yih-Hwa Aquino, Marcio H. O. Elmas, Zeynep G. Marques, H. A. Galera Monico, J. F. Silva, H. A. |
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 |
Amer Geophysical Union |
publishDate |
2014 |
url |
http://acervodigital.unesp.br/handle/11449/6664 http://hdl.handle.net/11449/6664 https://doi.org/10.1029/2010RS004575 |
geographic |
Norway Svalbard |
geographic_facet |
Norway Svalbard |
genre |
Northern Norway Svalbard |
genre_facet |
Northern Norway Svalbard |
op_relation |
Radio Science Radio Science. Washington: Amer Geophysical Union, v. 46, p. 14, 2011. 0048-6604 http://hdl.handle.net/11449/6664 http://acervodigital.unesp.br/handle/11449/6664 doi:10.1029/2010RS004575 WOS:000293641200003 http://dx.doi.org/10.1029/2010RS004575 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1029/2010RS004575 |
container_title |
Radio Science |
container_volume |
46 |
container_issue |
6 |
_version_ |
1766145677329432576 |