Results 71 to 80 of about 5,771 (200)

Voice and Position Simultaneous Communication System Based on Beidou Navigation Constellation

Xibei Gongye Daxue Xuebao, 2020
Considering China Beidou has unique two-way communication capability for short messages that are not available in other navigation systems such as GPS, a 600bps vocoder adapted to the short message channel of Beidou is developed.

doaj   +1 more source

Immune Response and Gut Microbiota Shift in the Red Palm Weevil (Rhynchophorus ferrugineus) Infected With Entomopathogenic Fungus, Beauveria bassiana, Reveal Host‐Pathogen Interactions

Archives of Insect Biochemistry and Physiology, Volume 122, Issue 2, June 2026.
This study reveals a “Microbiota‐Immune Axis” in Beauveria bassiana‐infected larvae, where gut dysbiosis positively correlates with systemic immunity in the fat body. Meanwhile, the hindgut exhibits immune tolerance, highlighting a tissue‐specific trade‐off between combating the pathogen and preserving the gut microbiome.
Tzu‐Hao Yang, Fang‐Min Chang, Pin‐Chang Chen, Rameshwor Pudasaini, Hsiao‐Pei Lu, Yu‐Shin Nai   +5 more
wiley   +1 more source

PRELIMINARY ANALYSES OF BEIDOU SIGNAL-IN-SPACE ANOMALY SINCE 2013 [PDF]

, 2016
As BeiDou navigation system has been operational since December 2012. There is an increasing desire to use multiple constellation to improve positioning performance. The signal-in-space (SIS) anomaly caused by the ground control and the space vehicle is
J. Ren, Y. Wu, W. Liu
core   +1 more source

THE DEVELOPMENT OF NAVIGATION SYSTEMS IN CIVIL AVIATION

Научный вестник МГТУ ГА, 2017
The article describes the history of navigation systems formation, such as "Cicada" system, which at that time could compete with the US "Transit", European, Chinese Beidou navigation system and the Japanese Quasi-Zenit.The detailed information about ...
A. S. Stepanenko
doaj  

Waste‐Derived Functional Carbon for Rapid PAHs Removal: A Sustainable Pathway for Co‐Remediation and Resource Valorization of Oily Sludge

SusMat, Volume 6, Issue 3, June 2026.
Oily sludge is converted into co‐pyrolytic carbon (CPC) through co‐pyrolysis with biomass and further functionalized with APTES to form APTES/CPC. The modified carbon enables rapid anthracene removal from petroleum‐contaminated wastewater, achieving most adsorption within 1 min and reaching equilibrium within 10 min. The enhanced adsorption performance
Chengze Yu, Jun Cui, Mingxiao Li, Yanjun Xin, Dan Wei, Jiaqi Hou, Huibin Du, Jianbing Li, Beidou Xi   +8 more
wiley   +1 more source

Proposition of Ionospheric Grid in Navigation Satellite System BeiDou [PDF]

, 2017
This study shows the way of ionospheric data usage obtained from 2 Tables using D2 NAV message Chinese BeiDou system. It was identified particular algorithms for Table’s calculation. Authors also suggested data Table 2 modification and special algorithms
Jacek Lamparski, Lamparski, J.
core   +1 more source

Integrating GPS, GLONASS, BeiDou, and Galileo Receivers to Overcome Signal Blocking Challenges [PDF]

Iranian Journal of Electrical and Electronic Engineering
Blocking interference poses significant challenges to the accuracy and reliability of navigation systems by obstructing the communication path. Single-frequency receivers are generally more susceptible to blocking interference due to their limited ...
K. Bahmani, A. Sadr, M. R. Mosavi
doaj  

Accurate Ionospheric TEC Prediction With a Causal Attention Network at Northern EIA Crests

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 3, June 2026.
Abstract As the Sun approaches the peak of its 25th activity cycle, precise ionospheric forecasting has become increasingly challenging. Low‐latitude regions have emerged as a persistent bottleneck for space weather operations. Extensive evidence reveals that existing AI models exhibit significant performance degradation in these regions, demonstrating
Tong Liu, Wu Chen, Zexin Lu, Wenlong Zhang, Yuhang Lu, Feng Wang, Mengfei Sun, Wenfeng Nie, Junsheng Ding, Yufang He, Bo Chen   +10 more
wiley   +1 more source

Space Weather Effects From Moderate to Severe Geomagnetic Storms in October 2024 Over the Latin American Sector

Space Weather, Volume 24, Issue 6, June 2026.
Abstract This study presents a detailed case study of the ionospheric impacts of moderate (G2) and severe (G4) geomagnetic storms over the Latin American sector, with particular emphasis on the formation and suppression of equatorial plasma bubbles (EPBs).
C. S. Carmo, L. Dai, C. M. Wrasse, D. Barros, H. Takahashi, J. R. Costa, L. F. R. Vital, P. R. Jauer, C. De La Jara, A. J. Carrasco, C. A. O. B. Figueiredo, C. Wang, H. Li, Z. Liu   +13 more
wiley   +1 more source

A New Strategy for Improving Multi‐Frequency PPP‐RTK Ionospheric Correction Availability and User Performance in Low‐ and Middle‐Latitudes

Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.
Abstract High‐precision regional ionospheric correction products are essential for achieving accurate and fast‐convergence solutions in Precise Point Positioning Real‐Time Kinematic (PPP‐RTK). For users in low‐ and middle‐latitudes, PPP‐RTK server narrow‐lane (NL) ambiguity resolution (AR) typically requires more than 10 min, which largely affects the ...
Pan Li, Shitong Chen, Jiahuan Hu, Xin Xie, Jiadi Dai, Bao Shu, Guanwen Huang   +6 more
wiley   +1 more source