Results 1 to 10 of about 109,865 (214)
The Eddy Experiment: accurate GNSS-R ocean altimetry from low altitude aircraft [PDF]
, 2004 During the Eddy Experiment, two synchronous GPS receivers were flown at 1 km altitude to collect L1 signals and their reflections from the sea surface for assessment of altimetric precision and accuracy.
Elfouhaily +12 more
core +2 more sources
Impact analysis of processing strategies for long-term GPS zenith tropospheric delay (ZTD) [PDF]
Atmospheric 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
Quasi-4-dimension ionospheric modeling and its application in PPP
Satellite 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
Remote 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
Time-Relative RTK-GNSS: GNSS Loop Closure in Pose Graph Optimization [PDF]
IEEE Robotics and Automation Letters (RA-L), vol. 5, no. 3, pp.
4735-4742, July 2020, 2023 A pose-graph-based optimization technique is widely used to estimate robot poses using various sensor measurements from devices such as laser scanners and cameras. The global navigation satellite system (GNSS) has recently been used to estimate the absolute 3D position of outdoor mobile robots.
arxiv +1 more source
Space 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
Satellite 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
A double sideband combined tracking method for Galileo E5 AltBOC signals
Satellite 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
Geo-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
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A review of real-time multi-GNSS precise orbit determination based on the filter method
Satellite 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