A central issue in designing complex networked systems for critical applicative domains is the possibility of keeping each node of the network synchronized with respect to a given system time scale. The problem is even more critical when the synchronization accuracy determines directly the performances of the whole system.

July 2008

International Summer Schoool on GNS

21 – 31 July

Berchtesgaden, Bavaria, Germany

http://www.munich-satellite-navigationsummerschool.org

August 2008

ESRI’s 28th annual International User Conference

August 4-8, 2008 in San Diego, California

http://www.esri.com

3rd Indonesian Geo-Information …

The soaring food price in recent months has been unprecedented.
Increased food prices could lead to increased poverty and unrest.
Even, UN call …

Beneath our feet in the UK lies a vast labyrinth of millions of kilometres of buried pipes and cables, delivering key products and services essential to our social and economic well-being. These networks of buried assets need repair and maintenance, and the growing demands of the UK economy mean that in years to come the networks will continue to grow significantly, as will the amount of traffic on the streets under which many of these assets lie.
There are now more companies involved in digging holes across the UK than ever before. Latest estimates put this figure at around 4 million holes dug by utility companies annually, and this excludes any excavations made as part of construction projects and works away from the street. Every time a hole is dug it impacts on traffic and the local environment. Often, holes turn out to be ‘dry’ – inaccurate information means that assets thought to be there cannot be found.

Says, lisa Campbell, Vice President, Geospatial Solutions, Autodesk Inc

 
Tell us about autodesk’s geospatial solutions
Autodesk provide solutions to design, …

Sergey Revnivykh, Deputy Director General, Head of PNT Information Analysis Center of the Central Research Institute of Machine …

Very Long Baseline Interferometry (VLBI) is the unique space
geodetic technique which can provide the Celestial Reference Frame (CRF), the Terrestrial Reference Frame (TRF) and the relationship between the two frames — Earth Orientation Parameters (EOP) at the same time. VLBI has a widely usage in space geodetic, ground
geodetic, geophysical fields and so on. Presently, it can determine the position of the radio source outside the galaxy with 1mas precision, and determine several kilometers length of baseline on the earth’s surface with 1cm precision. Due to its high stability and high precision character, the Celestial Reference Frame outside the galaxy based on VLBI has been the best realization of the quasi-inertial referenceframe since 1980s. VLBI stations are the most important benchmarks in the International Terrestrial Reference Frame (ITRF), and VLBI is one main supporting technique which determines EOP. Till now, space and ground VLBI have accumulated more than 20 years’ data. They provide continuous and long-term data guarantee for space geodetic, ground
geodetic and geographical research.

The current GPS civil service provides suitable performance only in situations of good electromagnetic visibility; the positioning becomes difficult in severely signal degraded environments, e.g. mountainous or urban areas, where a lot of GPS signals are blocked by buildings or
natural obstacles. The GPS gaps can be partially solved employing spacebased augmentations systems; in this paper we consider geostationary and geosynchronous constellations. A simulation software has been developed in MATLAB® environment in order to study the integration of existent and feasible constellations.

July 2008

International Summer Schoool on GNS

21 – 31 July

Berchtesgaden, Bavaria, Germany

http://www.munich-satellite-navigationsummerschool.

August 2008

ESRI’s 28th annual International User Conference

August 4-8, 2008 in San Diego, California

http://www.esri.com

3rd Indonesian Geo-Information …

BE conference, May 28-30, 2008 Baltimore, USA

BE conference focused on BEst Practices for Sustaining Infrastructure …