Results 21 to 30 of about 8,787 (210)

Comparison of Satellite Repeat Shift Time for GPS, BDS, and Galileo Navigation Systems by Three Methods

open access: yesAlgorithms, 2019
The characteristic of the satellite repeat shift time can reflect the status of the satellite operation, and is also one of the key factors of the sidereal filtering multipath correction.
Yanxi Yang, Jinguang Jiang, Mingkun Su
doaj   +1 more source

Earth and Rock-Filled Dam Monitoring by High-Resolution X-Band Interferometry: Gongming Dam Case Study

open access: yesRemote Sensing, 2019
Middle-sized earth- and rock-filled dams with clay cores continue to settle by approximately 0.5⁻1.5% of their height for approximately 1⁻3 years after their construction phase.
Tao Li   +8 more
doaj   +1 more source

Multi-GNSS products and services at iGMAS Wuhan Innovation Application Center: strategy and evaluation

open access: yesSatellite Navigation, 2022
Over the past years the International Global Navigation Satellite System (GNSS) Monitoring and Assessment System (iGMAS) Wuhan Innovation Application Center (IAC) dedicated to exploring the potential of multi-GNSS signals and providing a set of products ...
Xingxing Li   +6 more
doaj   +1 more source

Integrated GNSS Attitude Determination and Positioning for Direct Geo-Referencing

open access: yesSensors, 2014
Direct geo-referencing is an efficient methodology for the fast acquisition of 3D spatial data. It requires the fusion of spatial data acquisition sensors with navigation sensors, such as Global Navigation Satellite System (GNSS) receivers.
Nandakumaran Nadarajah   +2 more
doaj   +1 more source

A MEMS-INS assisted GNSS vector tracking loop for robust navigation based on cubature Kalman Filter

open access: yesMeasurement + Control, 2023
The occlusion of shade leads to the intermittent reception of satellite signals, which subsequently results in a decline of the positioning accuracy of Global Navigation Satellite System (GNSS).
Wei Liu   +5 more
doaj   +1 more source

Maritime Multiple Moving Target Detection Using Multiple-BDS-Based Radar: Doppler Phase Compensation and Resolution Improvement

open access: yesRemote Sensing, 2021
With the realization of global navigation satellite system (GNSS) completion, GNSS reflectometry (GNSS-R) has become increasingly popular due to the advantages of global coverage and the availability of multiple sources in terms of earth remote sensing ...
Xiang Lan   +4 more
doaj   +1 more source

The Current Status of Research on GNSS-R Remote Sensing Technology in China and Future Development

open access: yesLeida xuebao, 2013
Global Navigation Satellite System (GNSS), has a significant impact on all areas of human activity, not only can provide users with shared global navigation, position and timing information, but also can provide a L-band microwave signal source of long ...
Li Huang, Xia Qing, Yin Cong, Wan Wei
doaj   +1 more source

A Feasibility Analysis of Land-Based SINS/GNSS Gravimetry for Groundwater Resource Detection in Taiwan

open access: yesSensors, 2015
The integration of the Strapdown Inertial Navigation System and Global Navigation Satellite System (SINS/GNSS) has been implemented for land-based gravimetry and has been proven to perform well in estimating gravity.
Kai-Wei Chiang   +2 more
doaj   +1 more source

Spatiotemporal Evaluation of GNSS-R Based on Future Fully Operational Global Multi-GNSS and Eight-LEO Constellations

open access: yesRemote Sensing, 2018
Spaceborne GNSS-R (global navigation satellite system reflectometry) is an innovative and powerful bistatic radar remote sensing technique that uses specialized GNSS-R instruments on LEO (low Earth orbit) satellites to receive GNSS L-band signals ...
Fan Gao   +6 more
doaj   +1 more source

Preliminary Design of Monitoring and Control Subsystem for GNSS Ground Station [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2008
GNSS (Global Navigation Satellite System) Ground Station monitors navigation satellite signal, analyzes navigation result, and uploads correction information to satellite.
Seongkyun Jeong   +4 more
doaj   +1 more source

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