From the beginning of 2008, we have been facing a period of high solar activity linked to solar cycle #24. Taking into account a typical duration of eleven years, solar cycle 24 would have just reached halfway point…

The present Position, Navigation and Timing (PNT) world infrastructure is mainly based on the American Global Positioning System (GPS), complemented by other Global Navigation Satellite Systems, such as the Russian GLONASS and the forthcoming European Galileo and Chinese Beidou…

The International Navigation Conference 2015 marked the return of the Royal Institute of Navigation to the business of organising major navigation meetings. For some years they have waited on the sidelines as too many conferences competed for a declining number of delegates….

VLBI plays a unique role in the practical realization and maintenance of the International Celestial Reference Frame (ICRF) and International Terrestrial Reference Frame (ITRF), it is also the only technique which provides the full set of Earth Orientation Parameters (EOP)[1]…

The Normalized Difference Water Index (NDWI) is derived using similar principles to the Normalized Difference Vegetation Index (NDVI) to enhance the spectral reflectance of surface water bodies…