Currently, the space segment of all five satellite systems capable providing precise time transfer services, namely BDS (including BDS-3 and BDS-2), GPS, GLONASS, Galileo, Quasi-Zenith Satellite System (QZSS), has almost been fully deployed, which will definitely benefit with satellite-based point positioning (PPP) technology. This study focuses on latest performance BDS/GPS/GLONASS/Galileo/QZS...

The increased number of satellites and stations leads to the serious time consumption integrated precise orbit determination (POD), especially in current global navigation satellite system (GNSS) with more than 120 satellites. To improve computational efficiency multi-GNSS-integrated POD, this paper proposed an improved parameter estimation method based on intel oneAPI high-performance computin...

The development of the first AGGA (Advanced GPS/GLONASS ASIC) device was initiated within ESA’s Earth Observation Preparatory Programme (EOPP) in order to support the Earth observation applications of navigation signals. After prototyping iterations, the flight component known as AGGA-2 was manufactured under Atmel product code T7905E [0]. The AGGA-2 is a space-qualified digital integrated circ...

Abstract Ground subsidence and uplift caused by the annual thawing freezing of active layer are important variables in permafrost studies. Global positioning system interferometric reflectometry (GPS-IR) has been successfully applied to retrieve continuous ground surface movements areas. However, only GPS signals were used previous In this study, using multiple global navigation satellite (GNSS...