The ionosphere has been the most challenging source of error to mitigate within the
community of global navigation satellite system (GNSS)-based safety-critical systems. Users …

Ionospheric scintillation is the physical phenomena affecting radio waves coming from the
space through the ionosphere. Such disturbance is caused by ionospheric electron-density …

Critical government and industry sectors (such as law enforcement, transportation,
communication, and finance) are growing increasingly dependent on Global Navigation …

It is well-known that the use of Vector Tracking Loops (VTL) in GNSS receivers can result in
improved tracking performance and sensitivity, faster acquisition, and improved interference …

This article presents a generalized multifrequency carrier tracking architecture applicable to
multifrequency global navigation satellite system receivers operating in frequency-selective …

In vector tracking loop (VTL), the relativity among received signals is exploited to deeply
integrate the entire information within signal processing channels. However, the tracking …

Strong equatorial ionospheric scintillation of radio signals is often associated with
simultaneous deep amplitude fading and rapid random carrier phase fluctuations. It poses a …

The standard vector phase-locked loop (VPLL) with fixed pre-defined process noise
covariance matrix usually loses lock when the receiver experiences high dynamic …

To make up for the insufficiency of earth-based TT&C systems, the use of GNSS technology
for high-orbit spacecraft navigation and orbit determination has become a new technology. It …

Ionospheric scintillation is one of the major threats and most challenging propagation
scenarios affecting Global Navigation Satellite Systems (GNSS) and related applications …