First Galileo-only position fix in Asia at NAVIS Print Email

News on GPSWorld and InsideGNSS magazines:

On March 27, 2013, the four In-Orbit Validation Galileo satellites (PFM, FM2, FM3, FM4) were visible at the same time in the sky of Hanoi, Vietnam for nearly two hours (from 2:15 to 4:00 GMT) while transmitting a valid navigation message.

Figure 1. Positions obtained by only Galileo E1 Open Service
(the antenna is located at the roof of the Ta Quang Buu library building inside HUST campus)

It was then possible for the research team of the NAVIS Centre at Hanoi University of Science and Technology (HUST) to compute successfully the first Galileo-only position fix in the Region.

In Figure 1 the obtained positions are depicted on top of the roof of the NAVIS Centre, were the antenna used to receive the signals is located (latitude = 21°00’16.69” N, Longitude = 105°50’37.90” E, height = 35,2 meters).

Figure 2. Skyplot of the satellites of the GPS and Galileo systems at the time of the campaign

In Figure 2 the position of the four Galileo satellites and of 12 GPS satellites at time of acquisition is depicted, while in Figures 3 the acquisition results of the four Galileo IOV satellites are reported.

Comparison of the position computed using only Galileo, only GPS or both systems together is also presented in Figure 4. It should be noted that during the campaign, the data demodulation process reports that the Galileo system announces the "navigation data valid" status for PFM and FM3, meanwhile the "working without guarantee" for FM2 and FM4.

Figure 4. Position computed when using GPS only, Galileo only, or GPS+Galileo




The Rector of Politecnico di Torino, Prof. Marco Gilli, visits HUST and NAVIS Print Email

Prof. Nguyen Trong Giang - President of Hanoi University of Science and Technology and Prof. Marco Gilli - Rector of Politecnico di Torino (Italia) - have signed the MOU of the two universities
(photo courtersy of HUST's CCPR)

On March 12, 2013, the delegation of Politecnico di Torino (Italia) led by the Rector Prof. Marco Gilli has visited Hanoi University of Science and Technology and NAVIS. The Politecnido di Torino was established in 1859, since then the University has been ranked as the No. 1 and Top 10 technical university in Italia and Europe respectively. Politecnico di Torino (Polito) and Hanoi University of Science and Technology (HUST) has a long time partnership for more than a decade. Through the fruitful cooperation activities between the two universities in the framework of EU-FP7 projects since 2004, the NAVIS Centre was established in 2010 and was upgraded to the "international joint research centre" model supported directly by the Polito and the HUST in December 2012. Following this model, the NAVIS Centre has the co-director policy with Prof. Gustavo Belforte (Polito) and Dr. Ta Hai Tung (HUST) being the international co-director and Vietnamese director of the Centre respectively.

After a year in the new management, NAVIS has had several important achievements in scientific/technological activities as well as in international cooperations.

To strengthen the cooperation, during the visit, the two universities have signed the MOU on double degree PhD programs to pave the way for young researchers and students of HUST and Polito to join the high quality PhD programs with the possibility of obtaining the degrees of both universities.

After the signing ceremony, the delegation visited NAVIS and was impressed by the preliminary results of the researchers and students of NAVIS.

 Prof. Marco Gilli was visiting the labs of NAVIS

Prof. Marco Gilli with NAVIS researchers and students

The delegation also paid a visit to the MICA Institute, another successful example of the "international joint research centre" model of HUST.

During the stay in Vietnam, the delegation of Polito also visited Ministry of Education and Training, and Ministry of Science and Technology to discuss the possibilities to improve the cooperation in education and research activities between Italia and Vietnam in general; and among Polito and Vietnamese universities in particular. The delegation also spent a short trip to Ha Long bay, a UNESCO World Heritage in Quang Ninh province.

Mr. Tran Viet Thanh - Vice Minister of Science and Technology - received the delegation of Politecnico di Torino

Review of GINESTRA Workshop Print Email

GINESTRA Participants

On 24th and 25th January the NAVIS Centre has organized and hosted the workshop of the GINESTRA Project, an action funded by the European Space Agency ESA to conduct a competence survey to assess the current capabilities on ionospheric monitoring in the Asia-Pacific Region and in India.

 Mr. HOANG Xuan Lan - Director of Department of International Cooperation, Hanoi University of Science and Technology - was giving his opening speech

About 45 participants from five different countries (China, Italy, Malaysia, Thailand, Vietnam) attended the conference. There were 12 presentations and one round table in which several attendees expressed their view on ionosphere monitoring studies in the Region.

Link to download the presentations of the Workshop

Ms. Zeti Akma Rhazali, Universiti Tenaga Nasional, Malaysia


Dr. Luca Spogli - National Institute of Geophysics and Volcanology (Italia)

In the morning of January 25th the participants visited the Ionosphere Monitoring Station in Phu Thuy managed by the Institute of Geophysics, Vietnam Academy of Science and Technology. Its Deputy Director, Prof. Le Huy Minh, and Ms. Pham Thi Thu Hong who have contributed to the workshop with interesting presentations have also led the visit to the Monitoring Station with great competence. The NAVIS Centre is looking forward to continue the fruitful collaboration that was started with them within this workshop.

GINESTRA participants at the Phu Thuy Ionosphere Observatory

Link to download other images of the GINESTRA Workshop

NAVIS Representatives brief the Minister of Science and Technology Print Email

From left to right: Prof. Gustavo Belforte (International Co-director), Prof. Nguyen Quan (Minister of Science and Technology), Dr. Ta Hai Tung (Director) and Dr. La The Vinh (Researcher)

On the morning of Tuesday 22nd January the representatives of the NAVIS Centre paid a visit to the Ministry of Science and Technology (MOST) and briefed the Minister Prof. Nguyễn Quân on the successful activities carried on so far as well as on the ongoing ones and those planned for the future.

The presentation has focused on the R&D achievements and ongoing activities such as the operation, in the premises of the NAVIS Centre, of two monitoring stations for the JAXA and the ESA.

Prof. Gustavo was reporting to the Minister

The strong international links of the Centre have been described together with its scientific results in terms of scientific publications, organization of workshops and seminars, participation to conferences that took place in the last year and are foreseen for 2013.

The Minister was impressed with the achievements of NAVIS in the past year and expressed his willingness to support NAVIS in its activities.

Seminar on Multipath Mitigation by Prof. Lawrence Lau, The University of Nottingham Ningbo China Print Email

Time: 15.30, Friday 25th January 2013

Place: Vietnamese German Centre, HUST Campus

Abstract: Phase multipath is one of the most crucial error sources in centimetre or millimetre level GNSS high precision positioning.  Short-delay multipath is still especially difficult to detect or mitigate by the state-of-the-art hardware-based techniques.  Therefore, processing algorithm-based multipath mitigation methods are crucial for the further improvement of positioning accuracy, either integrated with other techniques or in a stand-alone mode.   This seminar describes the background of GNSS multipath errors, effect of multipath, hardware-based multipath mitigation techniques, and processing algorithm-based multipath mitigation techniques in particular. Before presenting the technical content, a brief introduction of the University of Nottingham Ningbo China (UNNC) is given. 


Biography: Lawrence Lau is an Assistant Professor in Geodesy and Surveying at the University of Nottingham Ningbo China (UNNC). He obtained his PhD at University College London (UCL) in 2005. Before joining UNNC, he worked as an Associate Professor in the Institute of Geomatics in Barcelona from March 2010 to September 2011. In 2004 – 2010, he was a Postdoctoral Research Fellow at (UCL), UK. In his about 6 years at UCL he worked on several research projects, including two UK EPSRC-funded research project called SPACE, iNsight, two EU FP6 projects called BEAR and ANASTASIA, and two consultancy projects. SPACE was undertaken by a consortium of eleven UK university and industrial groups and iNsight (an on-going project) is undertaken by a consortium of thirteen UK university and industrial groups. Before joining UCL, he worked as a technical analyst in the Nottingham Scientific Ltd. (2002 - 2004) in design and development of the new European GNSS (Galileo); he worked on two European Commission (EC) and European Space Agency (ESA) funded Galileo System Test Bed (GSTB-V1: Orbit Determination and Time Synchronisation, and GSTB-C0) projects. In 1999 – 2002, he worked in the Hong Kong Polytechnic University as a Research Associate for several vehicle navigation projects.

Personal homepage:

Directly Involved Partners
Member of
Connect with NAVIS