Results 121 to 130 of about 18,179 (315)

Impact of Ionospheric Scintillations on GNSS Availability and Precise Positioning

Space Weather, Volume 23, Issue 2, February 2025.
Abstract For many applications where accuracy, availability, and integrity are essential, such as geodetic positioning and civil aviation, Global Navigation Satellite Systems (GNSS) are indispensable. However, GNSS signal dependability is severely hampered by ionospheric disturbances, especially equatorial plasma bubbles (EPBs), particularly in ...
C. R. Aguiar, J. F. G. Monico, A. O. Moraes   +2 more
wiley   +1 more source

Performance Assessment of PPP Surveys with Open Source Software Using the GNSS GPS\u2013GLONASS\u2013Galileo Constellations [PDF]

, 2020
In this work, the performance of the multi-GNSS (Global Navigation Satellite System) Precise Point Positioning (PPP) technique, in static mode, is analyzed.
Angrisano A., Dardanelli G., Gaglione S., Innac A., Pipitone C., Pisciotta A.   +5 more
core   +2 more sources

Satellite Positioning with Large Constellations [PDF]

arXiv, 2018
Modern global navigation satellite system receivers can access signals from several satellite constellations (including GPS, GLONASS, Galileo, BeiDou). Once these constellations are all fully operational, a typical receiver can expect to have on the order of 40-50 satellites in view.
arxiv  

The space–time references of BeiDou Navigation Satellite System

, 2021
The BeiDou Navigation Satellite System (BDS) is essentially a precise time measurement and time synchronization system for a large-scale space near the Earth.
Chun-hao Han, Li Liu, Zhiwu Cai, Yuting Lin   +3 more
semanticscholar   +1 more source

Ionospheric Response to the 24–27 February 2023 Solar Flare and Geomagnetic Storms Over the European Region Using a Machine Learning–Based Tomographic Technique

Space Weather, Volume 23, Issue 1, January 2025.
Abstract Two solar flares accompanied by coronal mass ejections (CMEs) occurred on 24–25 February (DOY 055–056), 2023, resulting in a large magnetic storm on DOY 058. We reconstructed the ionospheric electron density (IED) in Europe to analyze the spatial distribution of ionosphere and its temporal evolution during this period. Computerized ionospheric
Ting Li, Dunyong Zheng, Changyong He, Fei Ye, Pengfei Yuan, Yibin Yao, Mengguang Liao, Jian Xie   +7 more
wiley   +1 more source

Decoding PPP Corrections from BDS B2b Signals Using a Software-defined Receiver: an Initial Performance Evaluation [PDF]

arXiv, 2020
With the rapid development of China's BeiDou Navigation Satellite System(BDS), the application of real-time precise point positioning (RTPPP) based on BDS has become an active research area in the field of Global Navigation Satellite System (GNSS). BDS has provided the service of broadcasting RTPPP information.
arxiv  

Investigation of the Relationship Between the Air Pollution and Solar Activity [PDF]

, 2017
How did the Sun affect the air pollution on the Earth? There are few papers about this question. This work investigates the relationship between the air pollution and solar activity by using the geophysical and environmental data during the period of 2000-2016.
arxiv   +1 more source

Study on key technologies for air–water surface collaboration of observation unmanned aircraft vehicle

Electronics Letters, Volume 61, Issue 1, January/December 2025.
To address the issues of short flight duration and the inability to carry high‐computation resources in small observation unmanned aerial vehicles (UAVs) due to limited energy and payload capacities, a deployment framework is proposed for an air–water surface collaborative observation system based on energy replenishment and computation offloading.
Dongying Feng, Jingfeng Yang, Nanfeng Zhang, Jinchao Xiao, Shilu Dai, Bo Peng, Jiaping Li, Junfeng Xiong, Can Cui   +8 more
wiley   +1 more source

Single point positioning using GPS, GLONASS and BeiDou satellites [PDF]

, 2014
This paper introduces the Chinese BeiDou satellite system and its comparison with the actual completed American GPS and the Russian GLONASS systems. The actual BeiDou system consists of 14 satellites covering totally the Asia -
Cai, Changsheng, Pan, Lin, Santerre, Rock, Zhu, Jianjun   +3 more
core   +2 more sources

Emulation of Realistic GNSS Scenarios Over 3D Wave Field Synthesis and Over‐The‐Air Testing

IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.
This contribution takes the over‐the‐air testing method for wireless devices and combines it with the wave field synthesis technique to increase the efficiency, reliability and especially the realism of the tests. The main focus of this contribution is to use the aforementioned method to emulate realistic GNSS scenarios inside an anechoic chamber ...
Renato Zea Vintimilla, Kevin Drenkhahn, Christoph Wagner, Mario Lorenz, Markus Landmann, Giovanni del Galdo   +5 more
wiley   +1 more source