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Impact analysis of processing strategies for long-term GPS zenith tropospheric delay (ZTD) [PDF]

open access: yesAtmospheric Measurement Techniques, 2023
Homogenized atmospheric water vapour data are an important prerequisite for climate analysis. Compared with other techniques, GPS has an inherent homogeneity advantage, but it still requires reprocessing and homogenization to eliminate impacts of applied
J. Bai   +6 more
doaj   +1 more source

Structure and performance analysis of fusion positioning system with a single 5G station and a single GNSS satellite

open access: yesGeo-spatial Information Science, 2023
NaGlobal vigation Satellite System (GNSS) positioning technology is widely used for its high precision, global, and all-weather service. However, in complex environments such as urban canyons, GNSS performance is often degraded due to signal occlusion ...
Chi Guo   +4 more
doaj   +1 more source

Quasi-4-dimension ionospheric modeling and its application in PPP

open access: yesSatellite Navigation, 2022
Ionospheric delay modeling is not only important for Global Navigation Satellite System (GNSS) based space weather study and monitoring, but also an efficient tool to speed up the convergence time of Precise Point Positioning (PPP).
Shengfeng Gu   +7 more
doaj   +1 more source

Precise orbit determination of Haiyang-2D using onboard BDS-3 B1C/B2a observations with ambiguity resolution

open access: yesSatellite Navigation, 2023
The Haiyang-2D altimetry mission of China is one of the first Low Earth Orbit (LEO) satellites that can receive new B1C/B2a signals from the BeiDou-3 Navigation Satellite System (BDS-3) for Precise Orbit Determination (POD).
Kecai Jiang   +6 more
doaj   +1 more source

Improving Precise Orbit Determination of LEO Satellites Using Enhanced Solar Radiation Pressure Modeling

open access: yesSpace Weather, 2023
Precise orbit knowledge is a fundamental requirement for low Earth orbit (LEO) satellites. High‐precision non‐gravitational force modeling directly improves the overall quality of LEO precise orbit determination (POD). To address the potential systematic
Youcun Wang   +7 more
doaj   +1 more source

Performance Evaluation of Single-Frequency Precise Point Positioning and Its Use in the Android Smartphone

open access: yesRemote Sensing, 2021
The opening access of global navigation satellite system (GNSS) raw data in Android smart devices has led to numerous studies on precise point positioning on mobile phones, among which single-frequency precise point positioning (SF-PPP) has become ...
Min Li   +6 more
doaj   +1 more source

Precise orbit determination for BDS satellites

open access: yesSatellite Navigation, 2022
Since the first pair of BeiDou satellites was deployed in 2000, China has made continuous efforts to establish its own independent BeiDou Navigation Satellite System (BDS) to provide the regional radio determination satellite service as well as regional ...
Qile Zhao   +6 more
doaj   +1 more source

A double sideband combined tracking method for Galileo E5 AltBOC signals

open access: yesSatellite Navigation, 2023
The Galileo navigation satellite system (Galileo) E5 Alternative Binary Offset Carrier (AltBOC) signal brings various challenges due to its complex modulation, wide bandwidth, and multi-peaked auto-correlation function.
Tongwen Fan   +4 more
doaj   +1 more source

A review of real-time multi-GNSS precise orbit determination based on the filter method

open access: yesSatellite Navigation, 2022
Stable and reliable high-precision satellite orbit products are the prerequisites for the positioning services with high performance. In general, the positioning accuracy depends strongly on the quality of satellite orbit and clock products, especially ...
Yidong Lou   +7 more
doaj   +1 more source

Semi-analytical assessment of the relative accuracy of the GNSS/INS in railway track irregularity measurements

open access: yesSatellite Navigation, 2021
An aided Inertial Navigation System (INS) is increasingly exploited in precise engineering surveying, such as railway track irregularity measurement, where a high relative measurement accuracy rather than absolute accuracy is emphasized.
Qijin Chen   +3 more
doaj   +1 more source

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