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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
exaly +4 more sources
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. The orbit-only signal-in-space ranging errors (SISREs) of broadcast ephemerides available after the interruption are
Jing Qiao, Wu Chen, Shengyue Ji
exaly +4 more sources
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 +2 more
exaly +3 more sources
Precise real‐time navigation of LEO satellites using GNSS broadcast ephemerides [PDF]
Navigation, Journal of the Institute of 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
exaly +2 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
exaly +3 more sources
GNSS Real-Time ZTD/PWV Retrieval Based on PPP with Broadcast Ephemerides
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 satellite communication.
Xu, Z. +5 more
exaly +6 more sources
CMES - Computer Modeling in Engineering and Sciences, 2019 Abnormal effects in GPS broadcast ephemerides can have a significant effect on real-time navigation and positioning solutions that use the orbit and clock error data provided by GPS broadcast ephemerides. This paper describes three types of non-integer-hour navigation data in GPS broadcast ephemeris data.
Zhangzhen Sun +4 more
exaly +2 more sources
Introduction for the Special Issue on Beyond the Hypes of Geospatial Big Data: Theories, Methods, Analytics, and Applications [PDF]
, 2019 We live in the era of ‘Big Data’. In particular, Geospatial data, whether captured through remote sensors (e.g., satellite imagery) or generated from large-scale simulations (e.g., climate change models) have always been significantly large in size. Over
Kealy, Allison +2 more
core +2 more sources
AGG+, 2021 <p style="text-align: justify;">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. It has been shown that in practice, when аdjusting networks whose span between points exceeds 50 km, the ...
Tanja Đukanović +2 more
openaire +2 more sources