Results 41 to 50 of about 3,303,824 (246)

Investigation of Tightly Combined Single-Frequency and Single-Epoch Precise Positioning Using Multi-GNSS Data

Remote Sensing, 2020
The loose combination (LC) and the tight combination (TC) are two different models in the combined processing of four global navigation satellite systems (GNSSs).
Chenlong Deng, Qian Liu, Xuan Zou, Weiming Tang, Jianhui Cui, Yawei Wang, Chi Guo   +6 more
doaj   +1 more source

MULTI-GNSS PPP: An Alternative Positioning Technique for Establishing Ground Control Points

International Journal of Environment and Geoinformatics, 2020
Traditionally, ground control points (GCPs) are utilized to determine absolute image orientations indirectly in aerial triangulation. For a long time, differential and relative GNSS (Global Navigation Satellite System) positioning techniques have been ...
Berkay Bahadur, Metin Nohutçu
doaj   +1 more source

Review of Bridge Structural Health Monitoring Based on GNSS: From Displacement Monitoring to Dynamic Characteristic Identification

IEEE Access, 2021
Deformation monitoring and dynamic characteristic analysis of bridge structures are the vital and basic requirements for the safe operation of bridges.
Xinpeng Wang, Qingzhi Zhao, Ruijie Xi, Chenfeng Li, Guanqing Li, Ling'Ai Li   +5 more
doaj   +1 more source

Real-Time Tropospheric Delay Retrieval from Multi-GNSS PPP Ambiguity Resolution: Validation with Final Troposphere Products and a Numerical Weather Model

Remote Sensing, 2018
The multiple global navigation satellite systems (multi-GNSS) bring great opportunity for the real-time retrieval of high-quality zenith tropospheric delay (ZTD), which is a critical quality for atmospheric science and geodetic applications.
Cuixian Lu, Xin Li, Junlong Cheng, Galina Dick, Maorong Ge, Jens Wickert, Harald Schuh   +6 more
doaj   +1 more source

Characterization of multi-scale ionospheric irregularities using ground-based and space-based GNSS observations

Satellite Navigation, 2021
Ionospheric irregularities can adversely affect the performance of Global Navigation Satellite System (GNSS). However, this opens the possibility of using GNSS as an effective ionospheric remote sensing tool.
YuXiang Peng, Wayne A Scales, Michael D Hartinger, Zhonghua Xu, Shane Coyle   +4 more
doaj   +1 more source

The BeiDou Navigation Message [PDF]

, 2013
The article provides an overview of the BeiDou navigation message contents and highlights its specific communalities and differences with respect to other GNSS constellations. Making use of data collected by multi-GNSS monitoring stations of the MGEX and
Steigenberger, Peter, Montenbruck, Oliver   +1 more
core   +1 more source

The Four Key Challenges of Advanced Multisensor Navigation and Positioning [PDF]

, 2014
The next generation of navigation and positioning systems must provide greater accuracy and reliability in a range of challenging environments to meet the needs of a variety of mission-critical applications.
Martin, H, Jiang, Z, Henry Martin, Groves, PD, Wang, L, Lei Wang, Ziyi Jiang, Walter, D, Voutsis, K, Kimon Voutsis, Debbie Walter, Paul D Groves   +11 more
core   +1 more source

A novel quasi-open loop architecture for GNSS carrier recovery systems [PDF]

, 2012
The problem of designing robust systems to track global navigation satellite system (GNSS) signals in harsh environments has gained high attention. The classical closed loop architectures, such as phase locked loops, have been used for many years for ...
Letizia Lo Presti, Maurizio Fantino, Tahir, Muhammad, Lo Presti, Letizia, Fantino, Maurizio, Muhammad Tahir   +5 more
core   +1 more source

Autonomous GEO Satellite Navigation with Multiple GNSS Measurements [PDF]

, 2009
The poor satellite visibility and the weak signal power of the Global Positioning System (GPS) signal reception in side lobes are the main constraint on the Geostationary Earth Orbit (GEO) determination, however, the situation will improve when multi ...
Lim, S ; https://orcid.org/, Qiao, L ; https://orcid.org/, Liu, J, Rizos, C ; https://orcid.org/   +3 more
core   +1 more source

Signal Obstructions at GNSS Stations: Benefits From Multi-GNSS Observations [PDF]

, 2015
The current accuracy of IGS products, few centimeter level, requires amongst other things that the location for GNSS antennas are nearly optimal for GNSS observations.
TEFERLE, Felix Norman, Dach, Rolf, ABRAHA, Kibrom Ebuy, HUNEGNAW, Addisu   +3 more
core   +1 more source