We present the results of C/A code common-view Global Positioning System (GPS) comparisons between the UTC (NIST) time scale, located at the National Institute of Standards and Technology (NIST) in Boulder, Colorado, and the Brazilian national time scale, UTC(ONRJ), located at the National Observatory (ONRJ) in Rio de Janeiro, Brazil. The two time scales are separated by a long baseline of ~860...

On the Background of precision farming and the precision positioning of variable rate fertilization, the precision farming was achieved and the per unit yield was raised by the integrated positioning method using GPS, electronic compass, and gyroscope.

Environment sensing systems and positioning systems such as GPS (Global Positioning System) are requirements for logistics supply chains, especially refrigerated cargo systems that require environment sensing data. In this paper, we state our system requirements and compare our proposed solution with other existing solutions. Our proposed system focuses on the cold chain tracking system to prov...

This paper introduces two sport-related projects conducted by the Satellite Positioning and Orientation Research Team (SPORT) at RMIT University – the speed sailing world record challenge and development of a smart GPS rower tracking system. In the first project, both traditional and contemporary surveying technologies are investigated to assist the Macquarie Speed Sailing Team to reliably reco...

EGNOS the European complement to the GPS and GLONASS systems is operating navigation payloads flown on geostationary satellites. Its role is to augment the performance of the GPS and GLONASS systems by improving their service integrity and the accuracy of their measurements. These two systems were originally designed for military purposes and their services were subsequently offered to civilian...

This paper evaluates the positioning performance of a single-frequency software GPS receiver using Ionospheric and Tropospheric corrections. While a dual-frequency user has the ability to eliminate the ionosphere error by taking a linear combination of observables, a single-frequency user must remove or calibrate this error by other means. To remove the ionosphere error we take advantage of the...

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...

In this paper, we describe a system offering a solution to the problem of ambulance management and emergency incident handling in the prefecture of Attica in Greece. It is based on a Geographic Information System (GIS) coupled with Global Positioning System (GPS) and Global System for Mobile Communication (GSM) technologies. The system's operation is expected to minimize the ambulances' respons...

Recently, after a family trip, a friend of mine decided to go back to use his old paper map in his travels and to put his GPS receiver to rest for ever. This came after a series of deceptions by this little device with the annoying automated voice and the 4" screen and the constantly lost signal, his words notmine. The latest of these deceptions was a trip from Ottawa to Niagara Falls which too...

We will see that receivers use very simple mathematics, but that they use it in highly ingenious ways. Being able to locate our position on the surface of the earth has always been important for commercial, scientific, and military reasons. The development of navigational methods has provided many mathematical challenges, which have been met and overcome by some of the best mathematicians of al...