High frequency multi-GNSS zero-difference applications like Precise Orbit Determination
(POD) for Low Earth Orbiters (LEO) and high frequency kinematic positioning require …

Real-time satellite orbit and clock estimations are the prerequisite for Global Navigation
Satellite System (GNSS) real-time precise positioning services. To meet the high-rate update …

Abstract The Japan Aerospace Exploration Agency (JAXA) has developed Multi-GNSS
Advanced Demonstration tool for Orbit and Clock Analysis (MADOCA). This tool estimates …

Today, most precise GNSS products, including orbits and clocks, are provided by the
International GNSS Service (IGS) and its Analysis Centers (ACs). Each AC provides its …

High-quality satellite orbits and clocks are necessary for multi-GNSS precise point
positioning and timing. In undifferenced GNSS solutions, the quality of orbit and clock …

In this study, we determine the near real-time (NRT) clocks of the Global Positioning System
(GPS) and Globalnaya Navigatsionnaya Sputnikovaya Sistema (GLONASS) satellites in the …

• GNSS-based Precise Orbit Determination (POD) of Low Earth Orbiters (LEOs) has
nowadays become a standard application for high-quality GNSS products as provided by …

Real-time satellite orbit and clock product is a key prerequisite for real-time precise
positioning service based on precise point positioning (PPP). With the rapid development of …

A continuously increasing number of satellites of Global Navigation Satellites Systems
(GNSS) and their constant modernization allow us to improve the positioning accuracy and …

As part of the International GNSS Service (IGS) multi-GNSS Pilot Project (MGEX), precise
orbit and clock products for multi-GNSS constellations have been submitted by several …