Results 1 to 10 of about 163,832 (185)
Investigating Performance of BDS-2+3 Dual-Frequency Absolute Positioning With Broadcast Ephemerides, RTS and Final MGEX Products [PDF]
IEEE Access, 2023 BDS-3 was formally put into service on July 31, 2020, and now along with BDS-2 provides the positioning, navigation and timing services. In this contribution, different techniques of dual-frequency absolute positioning using the fully serviceable BDS-2 ...
Shengnan Liu, Shaolin Zhu, Jian Zhang
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Accurate and Rapid Broadcast Ephemerides for Beidou-Maneuvered Satellites [PDF]
Remote Sensing, 2019 The geostationary earth orbit (GEO) and inclined geosynchronous orbit (IGSO) satellites of the Beidou navigation satellite system are maneuvered frequently. The broadcast ephemeris can be interrupted for several hours after the maneuver.
Jing Qiao +3 more
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AGG+, 2021 This paper analyses how broadcast and precise ephemerides in alignment, using the least-squares method, affect the accuracy of coordinates of the newly included permanent stations.
Tanja Đukanović +2 more
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GNSS Real-Time ZTD/PWV Retrieval Based on PPP with Broadcast Ephemerides [PDF]
AtmosphereGNSS precise point positioning (PPP) plays an important role in retrieving atmospheric water vapor values and performing numerical weather prediction. However, traditional PPP relies on real-time orbits and clocks, which require continuous internet or ...
Zongqiu Xu +5 more
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Design of the broadcast ephemerides for the Lunar Communication and Navigation Services system [PDF]
Progress in Earth and Planetary ScienceThe last few years have brought extensive growth of interest in the Earth’s natural satellite—the Moon. The lunar surface, especially the surroundings of its south pole, is supposed to become a getaway for space exploration including Mars in the first ...
Grzegorz Bury +2 more
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Precise point positioning with GPS and Galileo broadcast ephemerides [PDF]
GPS Solutions, 2021 AbstractFor more than 20 years, precise point positioning (PPP) has been a well-established technique for carrier phase-based navigation. Traditionally, it relies on precise orbit and clock products to achieve accuracies in the order of centimeters. With the modernization of legacy GNSS constellations and the introduction of new systems such as Galileo,
Luca Carlin +2 more
semanticscholar +6 more sources
Precise real‐time navigation of LEO satellites using GNSS broadcast ephemerides [PDF]
NAVIGATION, 2021 The availability of orbit information with high precision and low latency is a key requirement for many Earth-observation missions, predominantly in the field of radio occultation. Traditionally, precise orbit determination solutions of low-Earth orbit (LEO) satellites are obtained offline on ground after downloading GNSS measurements and auxiliary ...
André Hauschild, Oliver Montenbruck
semanticscholar +4 more sources
Precise disciplining of a chip-scale atomic clock using PPP with broadcast ephemerides [PDF]
GPS Solutions, 2023 AbstractOver the last decade, chip-scale atomic clocks (CSACs) have emerged as stable time and frequency references with small size, weight, and power (SWaP). While the short-term stability of these devices clearly outperforms other oscillators with similar power consumption, their stability over longer time intervals is notably limited by frequency ...
Florian Kunzi, Oliver Montenbruck
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UTC and GNSS system time access using PPP with broadcast ephemerides [PDF]
GPS Solutions, 2022 AbstractThe application of precise point positioning with broadcast ephemerides (PPP-BCE) is discussed as an alternative to the established all-in-view technique for multi-GNSS time transfer. It combines the use of broadcast ephemerides with low-noise carrier-phase observations for accessing GNSS system time scales and Coordinated Universal Time (UTC ...
Luca Carlin +3 more
semanticscholar +3 more sources
Multi-GNSS Combined Orbit and Clock Solutions at iGMAS [PDF]
Sensors, 2022 Global navigation services from the quad-constellation of GPS, GLONASS, BDS, and Galileo are now available. The international GNSS monitoring and assessment system (iGMAS) aims to evaluate the navigation performance of the current quad systems under a ...
Wei Zhou +5 more
doaj +2 more sources