Global navigation satellite systems (GNSS) provide a great data source about the
ionosphere state. These data can be used for testing ionosphere models. We studied the …

The anomaly phenomenon of broadcast ionospheric model coefficients of the Global
Positioning System (GPS) is revealed after analyzing the navigation file data collected from …

A modified ionospheric correction method and the corresponding approximate algorithm for
spaceborne single-frequency Global Positioning System (GPS) users are proposed in this …

Nowadays, the Global Navigation Satellite System (GNSS) is commonly used for
positioning, navigation and timing. The GNSS based services are used in many areas such …

The positioning signals broadcast by GNSS constellations are affected by significant errors,
notably due to the crossing of the ionospheric layer or of the tropospheric layer. Several …

This paper shows the analysis results of time offsets using P1, P2 and P3 code in GPS time
transfer. The r2cggtts program has been used in GNSS Time Transfer and use the P3 …

Abstract Global Navigation Satellite Systems (GNSS) are the main systems that provide
positioning, navigation and timing at a global level. They are being used in numerous …

Abstract Global Navigation Satellite System (GNSS) data along with the Nequick 2 Model
were used to study the monthly TEC profiles for Nigerian GNSS Reference Network Stations …

Introduction: This publication is the product of research developed within the research lines
of the Advanced and Large-scale Computing (Cage) research group throughout 2018 …

Among the various factors limiting accurate positioning with a Global Navigation Satellite
System (GNSS) is the inherent code error level on a code observation, cycle slip occurrence …