Global Positioning System

Hofmann-Wellenhof, Bernhard; Lichtenegger, Herbert; Collins, James J.

doi:10.1007/978-3-7091-6199-9

Cited by 639 publications

(374 citation statements)

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“…In solar maximum, only CRES (38° S) TEC value set in outstanding high (23 TECU) at 0300 UT while the other latitude locations remained the same high TEC value (15)(16)(17)(18)(19)(20). In December displayed increasing TEC value (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19) at BEUA (35°S) dominantly increased if compared with other latitude stations (3 -13 TECU). The low TEC value gradually decreased to 1700 UT (3 TECU) but the low TEC value period in December from 0100-0900 UT (3)(4) or from midday to dusk.…”

Section: Methodsmentioning

confidence: 99%

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Comparison of Ionosphere at Middle Latitude Zone during Solar Maximum and Solar Minimum

Sukcharoen¹,

Weng²,

Charoenkalunyuta³

et al. 2017

IJET

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Abstract-The impact of the satellite-based technologies is significantly increasing nowadays, while the satellite signal processing still imperfect. Especially when satellite signals travel through ionosphere layer since Total Electron Contents (TEC) flowing throughout ionosphere layer interrupt these signals. This paper purposes to investigate the characteristics of ionosphere as the temporal analysis during the equinox period which is extremely influence and during the solstice period which is slightly influence to TEC variation compared between solar maximum and minimum. The spatial analysis used the GPS data from different geographic latitude in the middle latitude region where the variation of TEC is pretty quiet and calm. The results show TEC distribution during solar maximum was greater and more violent than that in solar minimum. The peak values mostly occurred in April and September while the lowest value period occurred in June. Furthermore the exploration of the diurnal analysis during solar maximum increased regularly from noon until dusk while solar minimum also rose up at noon to dusk. Mostly TEC variation had the same pattern but only some latitude appeared unconventional.

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Section: Methodsmentioning

confidence: 99%

“…Unfortunately, satellite signal will also be degraded by many other parameters before arriving receiver antenna. So, the accuracy of position calculation still depends on many parameters not only the ionosphere error [10].…”

Section: A When Gps Signal Though the Ionospherementioning

confidence: 99%

Comparison of Ionosphere at Middle Latitude Zone during Solar Maximum and Solar Minimum

Sukcharoen¹,

Weng²,

Charoenkalunyuta³

et al. 2017

IJET

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“…HSVNs need to include a reliable communication protocol between VANETs and WSNs, which have to interchange dynamic and static data from their respective nodes. Most of the studies make several assumptions such as GPS (Global Positioning System) [19] devices available in all vehicles, embedded microprocessor and sensors in the road side devices, and the use of identical digital maps in the whole network. One of the most important features is that there is no limit in the batteries lifetime of the road side devices or in the storage size as well.…”

Section: Related Workmentioning

confidence: 99%

Performance evaluation of a hybrid sensor and vehicular network to improve road safety

Barba¹,

Aguirre²,

Igartua³

2010

Proceedings of the 7th ACM Workshop on Performance Evaluation of Wireless Ad Hoc, Sensor, and Ubiquitous Networks

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ABSTRACT, are focused on improving the road driving. This type of approaches will warn the driver and the co-pilot of any event occurred in the road ahead, such as traffic jam, accidents, bad weather, etc. This way, the number of traffic accidents may decrease and many lives might be saved. Besides, a better selection of non-congested roads will help to reduce pollution. In addition, other attractive services, such as downloading of multimedia services or Internet browsing, would be easily available through infrastructure along the roadside. Transportation in motorways will be easier, safer and more comfortable for passengers. In this paper a HSVN platform is presented, also a communications protocol between VANETs and WSNs is described and evaluated using the NCTUns [3] simulator. Categories and Subject Descriptors General TermsDesign, Performance Keywords WSN (Wireless Sensor Network), VANET (Vehicular ad hoc Network), HSVN (Hybrid Sensor and Vehicular Network).

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“…Its receiver is not cheap enough, and the GPS signals cannot be received in the indoor environment and may be affected by harsh climate. Besides, the position reported by GPS receivers may have an error of 5 to 15 meters [2]. If the unmanned vehicle will be parked in the parking garage by itself, GPS can not provide sufficient information to avoid collisions and the accuracy of GPS is not enough for the narrow parking space.…”

Section: Introductionmentioning

confidence: 99%

“…There are many up-to-date positioning techniques, such as Global Positioning System (GPS) [1] [2], wireless local area networks (WLAN) [3] [4], wireless sensor networks (WSN) [5], bluetooth and infrared technologies [6] [7], depending on the transmission distance, the accuracy of the measured position and the cost of deployment. In general, the positioning of the unmanned vehicle driving system can be achieved by GPS which is really one of the most popular positioning technologies today.…”

Section: Introductionmentioning

confidence: 99%

Design and Prototype Implementation of A Novel Automatic Vehicle Parking System

Chou

Sheu

Chen

2006

2006 International Conference on Hybrid Information Technology

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Unmanned vehicle driving systems are getting interesting for the auto mobile industry. One of the key issues in the unmanned vehicle driving system is how to acquire the current position of the vehicle. In general, it can be achieved by Global Positioning System (GPS). However, if the unmanned vehicle will be parked in the parking garage by itself, GPS can not provide sufficient information to avoid collisions and the accuracy of GPS is not enough for the narrow parking space. An automatic vehicle parking system is proposed in the paper, where wireless sensor networks and infrared technologies are adopted simultaneously to enhance the accuracy of positioning. The prototype of the proposed automatic vehicle parking system is also implemented.

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Global Positioning System

Cited by 639 publications

References 0 publications

Comparison of Ionosphere at Middle Latitude Zone during Solar Maximum and Solar Minimum

Comparison of Ionosphere at Middle Latitude Zone during Solar Maximum and Solar Minimum

Performance evaluation of a hybrid sensor and vehicular network to improve road safety

Design and Prototype Implementation of A Novel Automatic Vehicle Parking System

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