Navigation, Guidance, Control and Dynamics Commons^™

The Giant Project, Luis Chocano, Javier Pérez, Miguel Aguilera

Online Journal of Space Communication

As the European satellite navigation programme moves forward, with EGNOS as the first step towards Galileo, the user community finds out the potential benefits that the GNSS-based applications can provide to the different economic areas of society. The aviation sector, which has played a decisive role in the specification of these systems, can obtain significant advantages by means of the combined use of GNSS (Global Navigation Satellite Systems) systems, once the technical, operational and regulatory problems are overcome.

This paper describes the activities that are planned in the context of the GIANT project, the organization of the proposed work and …

Helicopter Ship Board Landing System, Tom Ford, Mark Hardesty, Mike Bobye

Online Journal of Space Communication

Relative navigation of an aircraft (fixed wing or helicopter) close to ships at sea is a unique navigation problem. Shipboard helicopter operations provide a difficult operational environment. Wind over deck and wake turbulence shed by ship super structure offer challenging and unpredictable conditions during takeoff and landing. This is especially true in the operational environment that includes sea-state six, with its associated twenty-foot waves and thirty-three knot winds. Anything other than calm seas can create pitch, roll, yaw, and heave of the landing platform. Different sea going vessels behave in a variety of ways due to their size, hull design, …

Navigation Errors Introduced By Ground Vehicle Dynamics, William Travis, David M. Bevly

Online Journal of Space Communication

An analysis of navigational accuracy when influenced by ground vehicle dynamics is presented. Tests beds outfitted with various sensor suites were used to collect data when normal and extreme driving maneuvers are executed. The data was run through an extended Kalman filter to produce a navigation solution. The Kalman filter inputs varied on each test bed, using both automotive and tactical grade Inertial Measurement Units (IMU). The position, velocity, and course measurements were obtained from a DGPS unit mounted on the vehicles and used as a truth measurement when exploring dead reckoning error. Additional measurements, such as wheel speed, radar …

Space Communication And Aviation Navigation: The United States Moves Towards Performance-Based Navigation, Hank Cabler, Jeff Williams

Online Journal of Space Communication

The U.S. NAVSTAR GPS communications satellite network, integrated with the FAA's Wide Area Augmentation System, or WAAS, provides improvements in GPS accuracy and integrity for aviation navigation throughout the U.S. National Airspace System. WAAS has allowed the FAA to move toward a performance-based NAS, exploiting the concept of "required navigation performance," or RNP. The FAA, in cooperation with aviation stakeholders, is implementing performance-based navigation in the U.S. NAS. Two key components of performance-based navigation are Area Navigation (RNAV) and RNP. These components allow the flexibility to design more efficient airspace and instrument procedures that improve safety, access, capacity and efficiency.

Intelligent In-Vehicle Device Based On Arm-Linux Techniques, Xiaoqing Yue, Qishan Zhang, Qing Chang

Online Journal of Space Communication

A new Intelligent Transportation System (ITS) is introduced and some ideas about instruction trigger position (ITP) are presented. The design of terminal devices based on an embedded ARM-Linux system in vehicles is presented in detail, including the design and development of both hardware and software.

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 are …

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 in terms of supporting …

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 constellation, …

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. Also, …

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

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 the …

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 …

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 …

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 milestone …

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

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.

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

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

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

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) …