We compare the random error statistics (uncertainties) of COSMIC (Constellation Observing System for Meteorology, Ionosphere and Climate, C1) COSMIC-2 (C2) radio occultation (RO) bending angles refractivities months August 2006 2021 over tropics subtropics using three-cornered hat method. The uncertainty profiles are similar two RO missions in troposphere. However, a higher percentage C2 reach ...

With the development of global navigation satellite system(GNSS), hourly ultra-rapid products GNSS are attracting more attention due to their low latency and high accuracy. A new strategy method was applied by Shanghai Astronomical Observatory (SHAO) Analysis Center (AC) international Monitoring Assessment Service (iGMAS) for generating 6-hourly 1-hourly products, which mainly include American ...

In the next few years, surveyors using high productivity, real-time kinematic (RTK) positioning and indeed all other precision positioning users will be faced with a barrage of new global navigation satellite system (GNSS) signals from GPS, GLONASS, GALILEO and possibly COMPASS/Beidou2 as well as Satellite Based Augmentation Systems (SBAS) signals and Regional Navigation Satellite Systems (RNSS...

The aim of this paper is to investigate the impact of the upcoming Galileo system on GNSS tomography. The area covered by our tomography model is limited to the Austrian territory. The GPS and GLONASS data of 12 sites in different environments are analysed with respect to its quality and impact on the atmospheric tomography approach. We show how additional Galileo observations help to close the...

R2CGGTTS is a software program dedicated to provide clock solutions for GNSS time transfer in the standard CGGTTS (Common GPS GLONASS Time Transfer Standard) from RINEX observation files. This paper presents the upgrade of the R2CGGTTS to include observations of the future Galileo satellites; the approach is validated using the GIOVE data. A second part of the paper presents the possibilities o...

With the development of GPS, GLONASS, Galileo, Compass, QZSS and the IRNSS, there has been growing interest in the development of system independent receivers. However, one of the problems encountered in system independent receivers is in the different time systems employed by each of the satellite navigation systems. To overcome this problem it has become a standard practice to solve for the t...

Space weather monitoring and forecast require a permanent monitoring of the ionospheric state on global scale. The world-wide use of global navigation satellite systems such as GPS and GLONASS o7ers the unique chance for a permanent monitoring of the total ionization (total electron content—TEC) of the global ionosphere=plasmasphere up to about 20000 km height. In this study we turn our attenti...