Student Scholarship Award Workshop

August 2, 2014

14:10-14:15      Opening Remarks

14:15-15:30      Scholarship Award Presentations 1

1. Enhancement of Mongolian Real time GNSS network: Sumiya Altangerel (Ministry of Construction and Urban Development, Mongolia)

2. Unmanned Aerial Vehicles (UAV) Applications in the Philippines: Peter Alexander G. Felix (Regulus SpaceTech Incorporated, Philippines)

3. 3D-Map Aided Multipath Mitigation for Urban GNSS Positioning: I-Wen Chu (National Cheng Kung University, Taiwan)

4. Introduction on SGAC YGNSS Working Group
: Behnoosh Meskoob (Space Generation Advisory Council, Turkey)

5. Simulating Ionospheric Scintillation in GNSS in Signal Generator
: Tran Thanh Trung (Politecnico di Torino, Italy)


15:30-15:45      Break

15:45-17:00      Scholarship Award Presentations 2

    6. GPS/GNSS Continuously Operating System in Malaysia: Amirah Binti Ruslan (Universiti Teknologi Malaysia, Malaysia)

    7. Study of Accurate Ocean-Altimetry with GNSS-R Signal in Dayagshan Port
    : Liu Fegling (ShangHai Ocean University, China)

    8. Matched Filter – A Promising Architecture for GNSS Signal Acquisition
    : Abdul Malik Khan (Advanced Engineering Research Organization, Pakistan)

    9. Cost-Effective Precise Positioning for Geospatial Applications
    : Octavian Andrei (Chulalongkorn University, Thailand)

    10. Assessing the Applicability of GPS, GLONASS and BDS ready GNSS Receivers in Mapping under Tree Canopy
    : Louie P. Balicanta (University of Philippines, Philippines)


Enhancement of Mongolian Real time GNSS network

Sumiya Altangerel
Ministry of Construction and Urban Development, Mongolia

One of the of Mongolian governmental’s policy of geodesy and surveying activities is to enhance Mongolian geodetic network using GNSS, all surveying must be based on WGS coordinate system, to establish Real time GNSS network, to improve Post-processing service. It’s bring some good result save the time, keep cost, enhance quality of base maps. Mongolian government started work to establish GNSS CORS since the 2010 years. In last of 2014 years, going to established Real time GNSS network included 40 GNSS CORS. They used in work related surveying, cadastral map.

Unmanned Aerial Vehicles (UAV) Applications in the Philippines

Peter Alexander G. Felix
Regulus SpaceTech Incorporated, Philippines

Rice crop (Oryza sativa), the staple food of the Philippine population, is sensitive to various environmental factors for its growth including crop inputs and soil quality. Changes to these conditions the greatly affect its crop yield and total biomass. Traditional crop yield estimation in the country uses field sampling that uses a small fraction of the total crop area. This method can be considered as destructive, taking away crops from being part of the total yield. With the development of Remote Sensing Technology, it is now possible to tremendously improve the crop yield estimation over a variety of areas. One example of remote sensing is using satellite images. But the drawback of using satellite data is that its resolution are only for large scale estimation of large biomass areas. Using Low Altitude Remote Sensing (LARS) we can solve the problems of satellite data. This method uses aerial vehicles to collect ground data such as images. Therefore a UAV (unmanned aerial vehicle) is needed to perform crop yield calculation.

3D-Map Aided Multipath Mitigation for Urban GNSS Positioning

I-Wen Chu
National Cheng Kung University, Taiwan

Global navigation satellite system has been widely used in the personal and vehicular positioning. With the availability of multiple GNSS constellations, multiple frequency for ionospheric error compensation, and satellite-based augmentation for correction and integrity monitoring, the GNSS performance can be expected in most applications. Multipath effect is one of the major sources of GNSS positioning error. In the past, a variety of approaches have been addressed to account for the multipath issues. Yet, in urban environment, the multipath effect remains a critical issue because of a forest of buildings giving rise to higher rate of occurrence in signal obstruction and reflection. More recently, with the arrival of 3D map information, it can be used to enhance the satellite positioning performance since multipath effect is significantly subject to the environment. With the aid of 3D map, we applied ray-tracing techniques to estimate the path difference between the direct signal and the reflected signal. A database of the relation between the multipath-induced delay and the distance from the receiver to the building is established. Then, we can use this information to correct the position solution.

Introduction on SGAC YGNSS Working Group

Behnoosh Meskoob
Space Generation Advisory Council, Turkey

The Space Generation Advisory Council in support of the United Nations Program on Space Application (SGAC) is a non-governmental organization, which aims to represent university students and young space professionals to the United Nations, States, and space agencies. SGAC has permanent observer status in the UN Committee on the Peaceful Uses of Outer Space (COPUOS). SGAC has a long history and was conceived at the Third United Nations Conference on the Exploration and Peaceful Uses of Space (UNISPACE-III) in Vienna in 1999.  The SGAC Executive Council is made up of representatives from each of the six UN regions, and has a larger body of representatives from nation states. Our focus is on pragmatic space policy advice to policy makers based on the interests of students and young professionals, broadly in the age range 18-35, interested in space, from around the world. SGAC currently has 4,000 members in over 90 countries.
YGNSS is a team of students and young professionals under the Space Generation Advisory Council which aims to bring maximum benefits of GNSS to the future society. Noticing the need for the ‘youth’ to gain a better understanding of how GNSS is used in our everyday lives, YGNSS focuses on the outreach and education of GNSS applications. YGNSS project team members not only include students and young professionals from GNSS provider countries, but more importantly, developing space nations. Therefore we are able to represent the voices of nations that need to learn and use GNSS applications the most.  The Objectives of the Project: • Promote international cooperation in GNSS and GNSS Applications • Promote GNSS Education and Outreach • Support ICG (International Committee on GNSS) and its secretariat, in particular Working Group C: Information Dissemination • Reflect the perspectives of the Youth on international GNSS policies.
In this presentation, we will learn about SGAC, its origin, purpose and products as well as YGNSS, its background and activities.

Simulating Ionospheric Scintillation in GNSS in Signal Generator

Tran Thanh Trung
Politecnico di Torino, Italy

Scintillations are fluctuations in received amplitude and phase of the signals due to zones with irregular concentration of electrons. Scintillation impacts on the robustness of receivers such as C/N0 degradation, pseudorange and carrier phase measurement noise increases, cycle slips, loss of lock. These problems are the troubles for both low – price receivers and professional receivers but can be solved by monitoring the scintillation using GPS signal characteristics. The monitoring exactly is the calculation of S4 index for the amplitude scintillation and the computation of Sigma – Phi for the phase scintillation. Apart from the above sections, this presentation also introduces the simulation for the scintillation and the empirical work on the scintillation.

GPS/GNSS Continously Operating System in Malaysia

Amirah Binti Ruslan
Universiti Teknologi Malaysia, Malaysia

This topic will provide some information about the location and position of the GPS/GNSS Continously Operating System in Malaysia. There are several GNSS CORS (Continously Operating Reference System) discussed such as MYRTKnet, ISKANDARnet and MYRTKnet in Malaysia was managed by Department of Surveying and Mapping Malaysia (JUPEM). managed by the National Space Agency of Malaysia (ANGKASA). ISKANDARnet network development in southern Malaysia was managed by the UTM-GNSS and Geodynamics Research Group team Faculty of Geoinformation Engineering and Science, Universiti Teknologi Malaysia itself as well as the control centre, services and access of ISKANDARnet. All of the CORS in Malaysia system was setup by the Universiti Teknologi Malaysia, as main centre of GNSS development centre and education institute. The example of several collaboration project Universiti Teknologi Malaysia (UTM) with foreign countries will be discussed.

Study of Accurate Ocean-Altimetry with GNSS-R Signal in Dayangshan Port

Yun Zhang, FengLing Liu, QiMing Gu, WanTing Meng, ZhongHua Hong, YanLing Han
ShangHai Ocean University, China

The use of mesoscale ocean altimetry in satellite remote sensing presents problems. This paper investigates the remote-sensing capabilities of the Global Navigation Satellite System reflections (GNSS-R) for ocean applications, through theoretical studies and experimental data analysis, presenting experiments and a method for ground-based ocean altimetry with GPS reflected signals. The paper explores a method for measuring the relative height changes with GPS reflected signals. Known as carrier phase-delay altimetry, it adopts an open loop to track reflected signals and discusses height changes with multiple satellites. Accuracy in carrier phase-delay is demonstrated during the Dayangshan Port experiment. The resulting RMS errors are at centimeter level and change with different elevations. The relationship between the effective reflection area of antenna and the glistening zones is discussed. The study concludes that when two areas overlap, improved accuracy is achieved. Cumulative height variation can be obtained within a period of accumulation.

Matched Filter - A Promising Architecture for GNSS Signal Acquisition

Abdul Malik Khan
Advanced Engineering Research Organization, Pakistan

Matched filter based detectors are used extensively in communication systems. Correlator based implementation of matched filter is generally preferred in communication as well as GNSS systems due to its ease in realization.However correlator based design works well subject to initial conditions like phase match. In order to get the initial phase values (acquisition), several thousand correlators are used in parallel architectures or a time consuming serial search method is used. Match filter based acquisition however could achieve the similar results in more efficient manner. Besides this the MF can provide faster acquisition, false lock detection, jamming, spoofing and multi-path detection, flexibility to adapt to new signals like MBOC and altBOC, etc. This paper discusses a few aspect of Matched filter based GNSS acquisition.
Cost-Effective Precise Positioning for Geospatial Applications

Octavian Andrei
Chulalongkorn University, Thailand

Nowadays, many geospatial applications relay on precise positioning or location information. Although the level of accuracy of this information can reach centimetre of even millimetre level, the conventional way to achieve such level of performance has still a high cost and somehow limited, due to the hardware and software involved. As the accuracy is an addictive thing, a geospatial user may address a logical question such as “Could we get the precise location information in a most cost-effective matter?” This presentation aims to introduce several results on how the geospatial user can reduce the cost of conducting precise positioning. Although, as perhaps expected, there is a decrease in performance, the results demonstrate the obtained accuracy levels may be still attractive for certain geospatial applications, such as land, marine or aerial surveying, structural and environmental monitoring or early warning systems.

Assessing the Applicability of GPS, GLONASS and BDS ready GNSS Receivers in Mapping under Tree Canopy

Louie P. Balicanta, Patricia Kristen A. Dela Cruz, and Edison Paraiso
University of Philippines, Philippines

Global Navigation Satellite System (GNSS) has been widely used in many applications related to mapping. For almost four decades the U.S. NAVSTAR GPS was used as the main satellite technology used in most of these applications. The Russian GLONASS satellite system was upgraded and made available to commercial use in the past decade. Recently, the Chinese BeiDou Satellite Navigation System (BDS) was made available to mainland China and its neighbouring countries. Because of this several GNSS receivers manufactured in China were made capable of obtaining and reading satellite signals coming from the three satellite systems (GPS, GLONASS and BDS). In relation to GNSS application, researches were done to evaluate the performance of GPS under forest canopies. The result of one of the researches showed that GPS performance was significantly degraded under heavy canopies (Zheng et al., 2005).  This research aimed to test and assess the applicability of using a GNSS receiver (GPS, GLONASS and BDS ready) in forest canopy with increased observation accuracy.  Initial results show that with a GNSS receiver capable of reading GPS, GLONASS and BDS, position was fixed with high accuracy and a maximum fixing time of two (2) minutes in Real Time Kinematic Mode.