Over the recent past, the vulnerability of Global Navigation Satellite Systems (GNSS) to interference has become a concerning issue (Mitch, 2011), (Pullen, 2012). Nowadays, illegal portable jamming devices are becoming popular to protect the user from being tracked by GNSS in their vehicle. These so-called personal privacy devices radiate different types of interference signals in the GNSS frequency bands and can make conventional receivers inoperable. Counter measures have to be taken to prevent strong interference from blocking the GNSS-receivers for safety critical applications.

At the present the society is dependent on accurate and reliable Position, Velocity and Time (PVT) information acquired using Global Navigation Satellite Systems (GNSS). GNSS signals travel a long way from the satellite transmitter to the user receiver antenna on the Earth…

When looking at the timeline of technology of today’s consumer electronics, there are several interesting connections with technology and associated infrastructure originally (at least partly) developed in the cont ext of DoD funded projects. Large-scale integration of this technology into consumer electronics created an economy of scale that is unmatched, enabling capabilities and services that otherwise may have been prohibitive due to cost.

On March 2, 2011, the ESSP declared EGNOS’ Safety of Life (SoL) signal officially available for aviation with the authorization from the European Commission (EC) to provide the service. From that moment on the EGNOS SoL service was provided openly and freely accessible without any direct charge…

In Korea, technologies on WA-DGNSS (Wide area differential GNSS) has been being jointly developed by a consortium of universities and research organization in order to construct the system in the near future (Ho Yun et al., 2011 and Ho Yun et al., 2011). WA-DGNSS

In the late 1990s, while the European Union was defining what services Galileo would offer, two access-controlled services were defined: CAS1 (Control Access Service 1) and CAS2. CAS1 later became the Commercial Service (CS), and CAS2 the Public-Regulated Service (PRS).

The successful development of receivers, application technologies and services is a key requirement for the commercial success of the European Satellite Navigation System Galileo.

Russia’s Deputy Prime Minister Dmitry Rogozin has described as politically motivated the USs’ decision to freeze the construction of GLONASS signal calibration stations…

The region of Balkan Peninsula and in particular, the territory of Bulgaria characterizes with active tectonics and seismotectonics. A number of geological, geophysical and geodetic investigations demonstrate the recent activity of the region, and have tried to give a reasonable…

After years of development, as the representative of GNSS, GPS technology has been gradually replacing the conventional triangulation techniques and has become the main means of access to ground control point coordinates. From the initial decimeter magnitude to the current sub-centimeter or even millimeter level, the coordinate precision of ground points has been highly improved upon…