Diurnal Total Electron Content (TEC) variations prior to Mw 6.2 Tajikistan Earthquake of 9th May 2018 were investigated for pre earthquake…

The emergence of Global Navigation Satellite System (GNSS) has provided a remarkable opportunity to determine and manage position…

Soil Moisture is a key component of water cycle budget [6]. It is fundamental measurement in the fields of hydrology, flooding, agriculture etc…

GNSS signals are quite vulnerable to interference, jamming and spoofing

Dinesh Manandhar

Associate Professor (Project) Center for Spatial Information Science (CSIS) The University of Tokyo, Japan

Today, when you buy a computer, you also buy an anti-virus software. But why? It’s because you don’t feel secure with virus attacks to your brand new computer and you would like …

What is an “epoch” and how does this cause a GPS Week Rollover issue?

In the past decades, Global Navigation Satellite Systems (GNSS) have revolutionized positioning and navigation activities…

Geological data show that the region of Central-west Bulgaria is characterized by the presence of active deformations and modern seismic activity. The southern region of Sofia shows a complex tectonics formed by the intersection of several active faults.

Due to rapidly increasing applications of GNSS dependent systems, motivation has increased to spoof these signals for illegal or concealed transportation and to mislead receiver timing used by critical infrastructure. Detection and mitigation of spoofing…

In the last few months we have been witnessing a remarkable (and, to some extent, surprising) increase of interest for GNSS high accuracy positioning, involving both systems and receivers.

Reports of problems with GPS appear with increasing frequency. As two of many examples: