Dr Jinling Wang is a Senior Lecturer in the School of Surveying & Spatial Information Systems, UNSW. He is a Fellow of the Royal Institute of Navigation, UK, and a Fellow of the International Association of Geodesy (IAG). Jinling is a member of the Editorial Board for the international journal GPS Solutions, and was Chairman of the study group (2003-2007) on pseudolite applications in positioni...

The Global Positioning System (GPS) has risen from a mere paper design in the early 1970s to become a global utility of the 21st century. The system is used for diverse applications that include navigation of ground vehicles, ships, aircraft, and spacecraft, monitoring of millimeter-level shifts of the Earth's tectonic plates, and the precise timing of financial transactions and electrical powe...

The Global Navigation Satellite System can provide all-day three-dimensional position and speed information. Currently, only using the single navigation system cannot satisfy the requirements of the system's reliability and integrity. In order to improve the reliability and stability of the satellite navigation system, the positioning method by BDS and GPS navigation system is presented, the me...

The Global Positioning System (GPS) has been widely used in land vehicle navigation applications. However, the positioning systems based on GPS alone face great problems in the so called urban canyon environments where the GPS signals are often blocked by high buildings and there are not enough available satellites signals to estimate the positioning information of a x. To solve the problem, a ...

There are an increasing number of applications requiring precise relative position and clock offset information. The Global Positioning System has demonstrated precise and drift free position and timing information using CodeDivision-Multiple-Access (CDMA) spread spectrum technology. This technology is widely used and relatively inexpensive, making it attractive in applications beyond the scope...

Global Positioning System (GPS) Technology allows precise determination of location, velocity, direction, and time. The price of GPS receivers is falling rapidly and the applications are growing. PCMCIA receivers that can be connected to any notebook personal computers are available for $300-400 to end consumers. The main goal of this study was to survey current applications of GPS to distribut...

The integration of Global Navigation Satellite Systems (GNSS) carrier phases with Inertial Navigation System (INS) measurements is essential to provide accurate and continuous position, velocity and attitude information, however it is necessary to fix ambiguities rapidly and reliably to obtain high accuracy navigation solutions. In this paper, we present the notion of combining the Global Posit...

Traffic exposure assessments could misclassify the extent and locations of exposure if traditional recall surveys and self-reported travel diaries do not record all participant activities. The Harbor Communities Time Location Study (HCTLS) examines the nature, extent and implications of underreported locations/ trips in a case study which used portable Global Positioning Systems (GPS) devices t...

One of the instruments for determination of position used in several applications is the Global Positioning System (GPS). With a cheap GPS receiver, we can easily find the approximate position of an object. Accuracy estimation depends on some parameters such as dilution of precision, atmospheric error, receiver noise, and multipath. In this study, position accuracy with GPS receiver is classifi...

As the development of mobile communications and wireless networking technology and people's increasing demand for wireless location services, positioning services are more and more important and become the focus of research. However, the most common technology which supports outdoor positioning services is global positioning system (GPS), but GPS has been subjected to some restrictions in the c...