GPS positioning improvement by mitigating the ionospheric horizontal gradient

A 3D ionospheric model was developed using TC3D and IRI to enhance the effect of the ionosphere to the GPS signals. Four comparisons have been done to see the effect of the DGPS positioning such as baselines length (short and long), low and high solar activity, range measurement from three and eight...

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Main Author:	Sa’at, Nabila
Format:	Thesis
Language:	English English English
Published:	2016
Subjects:	TA501-625 Surveying
Online Access:	http://eprints.uthm.edu.my/734/1/24p%20NABILA%20SA%E2%80%99AT.pdf http://eprints.uthm.edu.my/734/2/NABILA%20SA%E2%80%99AT%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/734/3/NABILA%20SA%E2%80%99AT%20WATERMARK.pdf
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spelling	my-uthm-ep.7342021-08-30T07:30:29Z GPS positioning improvement by mitigating the ionospheric horizontal gradient 2016-08 Sa’at, Nabila TA501-625 Surveying A 3D ionospheric model was developed using TC3D and IRI to enhance the effect of the ionosphere to the GPS signals. Four comparisons have been done to see the effect of the DGPS positioning such as baselines length (short and long), low and high solar activity, range measurement from three and eight satellites and two different duration times (one and three hours). Some improvements can be seen after the corrections and it was a noticeable positioning improvement at the user location over the equatorial region. Improvement in the final positioning error can be found for all cases; with and without ionospheric corrections. From the results, positioning improvement has been achieved where only 26% of percentage error is from short baseline, 27% of percentage error from low solar activity, percentage error from 24% of 8 satellites and 40% of 3 hours period of time. It shows that it is important to consider criteria such as shorter baseline with more satellites viewing for longer duration of time (in hour) during low solar activity to achieve the improvement in the positioning. The effect of the ionospheric horizontal gradient which is more noticeable in the equatorial region has been resolved and will be very beneficial to improve the positioning of the user location, especially in applications such as surveying, geophysics, navigation and aviation. 2016-08 Thesis http://eprints.uthm.edu.my/734/ http://eprints.uthm.edu.my/734/1/24p%20NABILA%20SA%E2%80%99AT.pdf text en public http://eprints.uthm.edu.my/734/2/NABILA%20SA%E2%80%99AT%20COPYRIGHT%20DECLARATION.pdf text en staffonly http://eprints.uthm.edu.my/734/3/NABILA%20SA%E2%80%99AT%20WATERMARK.pdf text en validuser mphil masters Universiti Tun Hussein Onn Malaysia Faculty of Electrical and Electronic Engineering
institution	Universiti Tun Hussein Onn Malaysia
collection	UTHM Institutional Repository
language	English English English
topic	TA501-625 Surveying
spellingShingle	TA501-625 Surveying Sa’at, Nabila GPS positioning improvement by mitigating the ionospheric horizontal gradient
description	A 3D ionospheric model was developed using TC3D and IRI to enhance the effect of the ionosphere to the GPS signals. Four comparisons have been done to see the effect of the DGPS positioning such as baselines length (short and long), low and high solar activity, range measurement from three and eight satellites and two different duration times (one and three hours). Some improvements can be seen after the corrections and it was a noticeable positioning improvement at the user location over the equatorial region. Improvement in the final positioning error can be found for all cases; with and without ionospheric corrections. From the results, positioning improvement has been achieved where only 26% of percentage error is from short baseline, 27% of percentage error from low solar activity, percentage error from 24% of 8 satellites and 40% of 3 hours period of time. It shows that it is important to consider criteria such as shorter baseline with more satellites viewing for longer duration of time (in hour) during low solar activity to achieve the improvement in the positioning. The effect of the ionospheric horizontal gradient which is more noticeable in the equatorial region has been resolved and will be very beneficial to improve the positioning of the user location, especially in applications such as surveying, geophysics, navigation and aviation.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Sa’at, Nabila
author_facet	Sa’at, Nabila
author_sort	Sa’at, Nabila
title	GPS positioning improvement by mitigating the ionospheric horizontal gradient
title_short	GPS positioning improvement by mitigating the ionospheric horizontal gradient
title_full	GPS positioning improvement by mitigating the ionospheric horizontal gradient
title_fullStr	GPS positioning improvement by mitigating the ionospheric horizontal gradient
title_full_unstemmed	GPS positioning improvement by mitigating the ionospheric horizontal gradient
title_sort	gps positioning improvement by mitigating the ionospheric horizontal gradient
granting_institution	Universiti Tun Hussein Onn Malaysia
granting_department	Faculty of Electrical and Electronic Engineering
publishDate	2016
url	http://eprints.uthm.edu.my/734/1/24p%20NABILA%20SA%E2%80%99AT.pdf http://eprints.uthm.edu.my/734/2/NABILA%20SA%E2%80%99AT%20COPYRIGHT%20DECLARATION.pdf http://eprints.uthm.edu.my/734/3/NABILA%20SA%E2%80%99AT%20WATERMARK.pdf
_version_	1747830669829996544

GPS positioning improvement by mitigating the ionospheric horizontal gradient

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