The availability of GPS signals is a major concern for many existing and potential
applications. Fortunately, with the development of Galileo by the European Commission …

Although high sensitivity receiver technology is necessary to ensure sufficient observation
availability of satellite navigation in degraded signal environments, processing of high …

Reliable ambiguity resolution (AR) is essential to real-time kinematic (RTK) positioning and
its applications, since incorrect ambiguity fixing can lead to largely biased positioning …

Abstract Global Positioning System (GPS) receiver positioning capabilities are being
challenged by increasing requirements on positioning and navigation under environments …

Most of the positioning technologies for modern land vehicular navigation systems have
been available for 25 years. Virtually all of the systems augment two or more of these …

With the existing GPS, the replenishment of GLONASS and the launching of Galileo there
will be three satellite navigation systems in the future, with a total of more than 80 satellites …

Multi-constellation global navigation satellite systems (GNSSs) are expected to enhance the
capability of precise point positioning (PPP) by improving the positioning accuracy and …

The availability of two GNSS (Global Navigation Satellite System), GPS and Galileo, will
offer in future new possibilities to provide integrity and reliability information to the user both …

Some GPS applications require precise single point positions that are stable over time.
However, changes in GPS error sources can lead to a degradation in the relative (over time) …

Human activity in the polar regions is increasing, and as a result of this, the positioning
performance of global navigation satellite systems (GNSSs) in these regions is attracting …