Open Access. Powered by Scholars. Published by Universities.®

Systems and Communications Commons

Open Access. Powered by Scholars. Published by Universities.®

2,177 Full-Text Articles 3,174 Authors 976,939 Downloads 92 Institutions

All Articles in Systems and Communications

Faceted Search

2,177 full-text articles. Page 2 of 91.

Deflection Monitoring Of The Forth Road Bridge By Gps, Gethin Wyn Roberts, Chris Brown, Xiaolin Meng 2021 Ohio University

Deflection Monitoring Of The Forth Road Bridge By Gps, Gethin Wyn Roberts, Chris Brown, Xiaolin Meng

Online Journal of Space Communication

Researchers at the IESSG at the University of Nottingham, in conjunction with colleagues from Brunel University, have carried out deflection monitoring work on structures, notably bridges, for a decade. Initial work was carried out on the Humber Bridge, London's Millennium Bridge and the Wilford Footbridge in Nottingham. These trials were carried out over a number of years, using a whole succession of GPS receivers. The initial trials showed that the use of carrier phase GPS could indeed allow sub centimetre movements to be detected, in addition to which, the frequencies of the movements could be calculated. Today, the authors ...


Navio - A Navigation Service For Pedestrains, Günther Retscher, Michael Thienelt 2021 Ohio University

Navio - A Navigation Service For Pedestrains, Günther Retscher, Michael Thienelt

Online Journal of Space Communication

In the research project NAVIO (Pedestrian Navigation Systems in Combined Indoor/Outdoor Environments) at our university (Vienna University of Technology), we are working on the improvement of navigation services for pedestrians. We are mainly focusing on the information aspect of location-based services, i.e., on the user's task at hand and the support of the user's decisions by information provided by navigation services. Specifications allow us to select appropriate sensor data and to integrate data when and where needed, to propose context-dependent routes fitting to partly conflicting interests and goals as well as to select appropriate communication methods ...


The Possibility Of Precise Positioning In The Urban Area, Nobuaki Kubo, Ryosuke Shibasaki, Akio Yasuda 2021 Ohio University

The Possibility Of Precise Positioning In The Urban Area, Nobuaki Kubo, Ryosuke Shibasaki, Akio Yasuda

Online Journal of Space Communication

A third civil frequency at 1176.45MHz will be added to the GPS system.
QZSS (Quasi Zenith Satellite System) proposed by Japan will also have the
new signal. This new frequency and the advent of QZSS will greatly enhance
the accuracy, reliability and robustness of civilian GPS receivers. One of these
enhancements is that it is possible to determine the GPS phase ambiguities
more or less instantaneously. This performance will have a tremendous impact
on navigation. In this paper, the possibility of precise positioning in the urban
area is examined from a point of instantaneous ambiguity resolution.
A typical QZSS ...


Using Glonass In Combined Gnss Receivers: Current Status, Alexei E. Zinoviev 2021 Ohio University

Using Glonass In Combined Gnss Receivers: Current Status, Alexei E. Zinoviev

Online Journal of Space Communication

The paper focuses on using GLONASS in state-of-the-art combined GNSS (GPS/GLONASS) receivers. The launch of GLONASS-M satellite is an important event that opens new horizons for satellite navigation. Correspondingly, the description of advantages associated with new hardware and new navigation data of GLONASS-M satellites is given. Also, current status of GLONASS and plans of its modernization are considered.

For combined use of GPS and GLONASS, interoperability issues that originate from differences in initial designing of both systems need to be resolved. It is demonstrated that such issues have been resolved at the level that meets all the practical needs ...


Polar Air Traffic Control, Israel Greenfeld, Ron Sicker 2021 Ohio University

Polar Air Traffic Control, Israel Greenfeld, Ron Sicker

Online Journal of Space Communication

Air Traffic Control (ATC) operations over Continental US (CONUS) are becoming challenged due to increasing traffic loads vying for limited communications channels. Nevertheless, the CONUS situation is much better than what exists in the oceanic airspace.


The Implementation Of A Public-Private Partnership For Galileo: Comparison Of Galileo And Skynet 5 With Other Projects, Xavier Bertran, Alexis Vidal 2021 Ohio University

The Implementation Of A Public-Private Partnership For Galileo: Comparison Of Galileo And Skynet 5 With Other Projects, Xavier Bertran, Alexis Vidal

Online Journal of Space Communication

Galileo, Europe's global navigation satellite system, represents a major public infrastructure offering numerous advantages for civilian users worldwide. The public dimension combined with the significant growth of the satellite navigation markets prompted the European Union to choose a Public-Private Partnership (PPP) scheme for the deployment and operational phases of the Galileo program. After a short introduction on the fundamentals of PPP schemes, both Galileo and Skynet 5 programs are compared to other large scale PPP projects, mainly in the transport sector. It clearly appears that a strong cooperation between the public sector and industry is needed for PPPs in ...


Next Generation Differential Gps Architecture, A. Cleveland, D. Wolfe, M. Parsons, B. Remondi, K. Ferguson, M. Albright 2021 Ohio University

Next Generation Differential Gps Architecture, A. Cleveland, D. Wolfe, M. Parsons, B. Remondi, K. Ferguson, M. Albright

Online Journal of Space Communication

The United States Coast Guard is engaged in a project to re-capitalize Reference Station (RS) and Integrity Monitor (IM) equipment used in the Nationwide Differential Global Position System (NDGPS). The Coast Guard in partnership with industry is developing a new software application to run on an open architecture platform as a replacement for legacy equipment. Present commercially available off-the-shelf Differential Global Positioning System (DGPS) RS and IM equipment lacks the open architecture required to support long term goals and future system improvements. The utility of the proposed new hardware architecture and software application is impressive - nearly every aspect of performance ...


Operating Egnos, Ashley W. Lyon, Jon Westbrook, Umberto Guida 2021 Ohio University

Operating Egnos, Ashley W. Lyon, Jon Westbrook, Umberto Guida

Online Journal of Space Communication

The ESSP (European Satellite Services Provider) has been created in April 2000 to operate the EGNOS system and provide signal and data services to users in Europe. The company has now seen seven shareholders, all European Air Traffic Service Providers: NATS (UK), DGAC/DSNA (F), AENA (E), ENAV (I), DFS (D), NAV-PT (P) and skyguide (CH). These organisations are also responsible for the hosting and operations of EGNOS system infrastructure.

The EGNOS system has been designed, developed and deployed by Alcatel under a European Space Agency (ESA) contract as part of the ESA ARTES IX programme.

The EGNOS system ESA ...


Indian Plan For Satellite-Based Navigation Systems For Civil Aviation, S. V. Kibe 2021 Ohio University

Indian Plan For Satellite-Based Navigation Systems For Civil Aviation, S. V. Kibe

Online Journal of Space Communication

The Airports Authority of India and the Indian Space Research Organisation (ISRO) have signed a Memorandum of Understanding (MOU) to implement a satellite based navigation system as part of the satellite based Communication, Navigation, Surveillance (CNS) and Air Traffic Management (ATM) plan for Civil Aviation in India.

For satellite based navigation in India two core constellations--Global Positioning System (GPS) of the United States and GLONASS of the Russian Federation--are available. The position accuracies achievable with these core constellations are not good enough for precision approach and landing requirements of Civil Aviation. These constellations need to be augmented. Three types of ...


Issue 9: From The Guest Editors, Paul Bobrowski, Qishan Zhang 2021 Ohio University

Issue 9: From The Guest Editors, Paul Bobrowski, Qishan Zhang

Online Journal of Space Communication

Welcome to Issue 9 of the Online Journal of Space Communication as we discuss the Global Navigation Satellite System, its past, present and the direction its taking us.


The Role Of The Australian Communication And Media Authority (Acma) In Gnss Protection And Regulation, Kirsten Musgrove 2021 Ohio University

The Role Of The Australian Communication And Media Authority (Acma) In Gnss Protection And Regulation, Kirsten Musgrove

Online Journal of Space Communication

The Australian Communications and Media Authority (ACMA) is responsible for regulating telecommunications and radiocommunications in Australia, including promoting industry self-regulation and managing the radiofrequency spectrum. ACMA also has significant consumer protection responsibilities.

ACMA was established in July 2005 under the Australian Communications and Media Authority Act 2005, and exercises powers under the Telecommunications Act 1997, the Telecommunications (Consumer Protection and Service Standards) Act 1999, the Radiocommunications Act 1992, the Spam Act 2003, and other related legislation.


Designing Blended Experiences: Laugh Traders Design Fiction, BRIAN J. OKEEFE 2021 Farmingdale State College

Designing Blended Experiences: Laugh Traders Design Fiction, Brian J. Okeefe

Frameless

The increasing ubiquity of interactions that involve complementary digital content, physical objects, and spaces, brings about new challenges for designers. There is a need to embed designs in legacy systems, whether those are existing physical structures or existing digital platforms. Traditional approaches to product design, interaction design, and user experience design often do not take this new context into account. Many systems do not consider how designers produce new digital and physical experiences that work harmoniously, while supporting new interactions and relationships with people (Imaz and Benyon 2007; Jetter, Geyer, Schwarz & Reiterer 2012). To address this, we propose the idea ...


Establishing Efficient All One-To-One Paths By Exploring Cyclic Quorum Sets, Yiming Bian, Arun K. Somani 2021 Iowa State University

Establishing Efficient All One-To-One Paths By Exploring Cyclic Quorum Sets, Yiming Bian, Arun K. Somani

Electrical and Computer Engineering Conference Papers, Posters and Presentations

Cycle-based routing is an efficient routing mechanism widely used to achieve fault-tolerant, reliable, and robust network routing. To meet all-to-all source-destination pairs traffic requirements using cycle-based routing, one efficient method is to use quorum sets to establish cycles to serve each source and destination pair on one of the cycles. Quorum-based cycle routing significantly reduces the total number of direct links to be used in the network compared to establishing all point-to-point communication routes. Adopting different quorum sets provides similar flexibility and reliability yet yields significant differences in resource utilization. We compare multiple quorum sets to establish cycle-based routing paths ...


Review Of Data Mining Techniques For Detecting Churners In The Telecommunication Industry, Mahmoud Ewieda, Mohamed Ismail Roushdy, Essam Shaaban 2021 October 6 University

Review Of Data Mining Techniques For Detecting Churners In The Telecommunication Industry, Mahmoud Ewieda, Mohamed Ismail Roushdy, Essam Shaaban

Future Computing and Informatics Journal

The telecommunication sector has been developed rapidly and with large amounts of data obtained as a result of increasing in the number of subscribers, modern techniques, data-based applications, and services. As well as better awareness of customer requirements and excellent quality that meets their satisfaction. This satisfaction raises rivalry between firms to maintain the quality of their services and upgrade them. These data can be helpfully extracted for analysis and used for predicting churners. Researchers around the world have conducted important research to understand the uses of Data mining (DM) that can be used to predict customers' churn. This paper ...


Issue 8: Contributors, Sukarno Abdulrachman 2021 Ohio University

Issue 8: Contributors, Sukarno Abdulrachman

Online Journal of Space Communication

List of contributors for Issue 8.


Sudah Waktunya Menggunakan Ku-Band Di Indonesia, Prima Setiyanto Widodo 2021 Ohio University

Sudah Waktunya Menggunakan Ku-Band Di Indonesia, Prima Setiyanto Widodo

Online Journal of Space Communication

Sistem Komunikasi Satelit adalah salah satu sarana atau infrastruktur yang dapat digunakan untuk aplikasi broadband multimedia. Dalam dunia sistem komunikasi satelit, frekuensi C-band telah lama digunakan dan saat ini telah penuh. Dan telah lama pula dunia menerapkan frekuensi Ku-band untuk sistem komunikasi satelit karena dengan frekuensi ini aplikasi broadband bisa lebih baik digunakan (bandwidth lebih lebar). Selain keuntungan lainnya, yaitu terhindar dari interferensi dengan sistem microwave terestrial yang banyak memakai frekuensi C-band. Namun bagi Indonesia penggunaan frekuensi Ku-band ini memerlukan pengkajian yang cermat, karena frekuensi di atas 10 GHz. rentan terhadap hujan, terlebih hujan deras yang sering melanda Indonesia. Tulisan ...


It Is Time To Use The Ku-Band In Indonesia, Prima Setiyanto Widodo 2021 Ohio University

It Is Time To Use The Ku-Band In Indonesia, Prima Setiyanto Widodo

Online Journal of Space Communication

Satellite Communications Systems are infrastructures that can be used for broadband multimedia applications. In the communication satellite field, the C-band (4-6 GHz) frequencies have been used since the beginning and are now saturated. The Ku-band (11-18 GHz) has been used also for communication satellite systems, because with this frequency a bigger bandwidth can be applied. The Ku-band has other advantages, such as avoidance of interference with terrestrial microwave systems that often use the C-band frequency. However, for Indonesia, the use of the Ku-band needs a thorough examination because frequencies above 10 GHz are vulnerable to rain, especially heavy rain that ...


Tulang Punggung Ip Pita Lebar Memakai Satelit Di Indonesia Dengan Beaya Rendah, Onno W. Purbo 2021 Ohio University

Tulang Punggung Ip Pita Lebar Memakai Satelit Di Indonesia Dengan Beaya Rendah, Onno W. Purbo

Online Journal of Space Communication

Artikel ini menyajikan tentang beberapa tulang punggung berbasis IP yang beroperasi di Indonesia.

Pada dasarnya, jasa IP melalui VSAT yang digunakan bersama, seperti misalnya jasa DVB (Digital Video Broadcasting) nampaknya merupakan solusi murah yang menjadi favorit sebagai tulang punggung IP pita lebar melalui satelit, dibandingkan dengan pemecahan SCPC (Single Carrier Per Channel) yang biayanya lebih tinggi.

Pertanyaan-pertanyaan yang sering dikemukakan, seperti konfigurasi tipikal atau perusahaan mana yang memberikan jasa tersebut, juga diulas. Beberapa diantara jasa tersebut, khususnya jasa VSAT IP Satu Arah - Receive Only tidak memerlukan lisensi atau izin Pemerintah Indonesia.

Sebuah jasa VSAT DVB satu arah (receive only) yang ...


Low Cost Broadband Ip Satellite Backbone In Indonesia, Onno W. Purbo 2021 Ohio University

Low Cost Broadband Ip Satellite Backbone In Indonesia, Onno W. Purbo

Online Journal of Space Communication

This article will report on several IP-based satellite backbones in operation in Indonesia. Basically, shared VSAT IP service, such as Digital Video Broadcasting (DVB) service seems to be the favorite low cost solution for broadband IP satellite backbone compared to the more costly Single Channel Per Carrier (SCPC).

Answers to questions, such as typical configurations providing the service, will be described. Some of these services may be run without any government license. The receive-only IP VSAT service is one of these.

A one-way receive-only IP-based DVB VSAT service may be obtained for US $33-270 per month. Two-way DVB/RCS VSAT ...


Development Of An Indonesian Micro Satellite, Rakhim Yuba 2021 Ohio University

Development Of An Indonesian Micro Satellite, Rakhim Yuba

Online Journal of Space Communication

Indonesia's geographical condition is a blessing, at the same time a challenge to the continuity of its national development. Its numerous islands, big and small, stretching from Sabang to Merauke makes it imperative for Indonesia to use satellites for communication and other applications purposes.


Digital Commons powered by bepress