Results 61 to 70 of about 12,241 (271)
Reports on Geodesy and GeoinformaticsThe field of satellite navigation has seen significant advancements due to the fast development of multi-constellation Global Navigation Satellite Systems (GNSS).
Pirti Atinç
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Journal of Marine Science and EngineeringThe Argo buoy detects marine environmental data by making profile movements in the ocean and transmits the profile detection data to the shore base through the communication terminal.
Hongyu Li +5 more
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WFH: A Wideband Frequency Hopping‐Based Anti‐Jamming Navigation Signal Structure
IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.Given the limitations of existing satellite navigation signals in antijamming performance amid growing environmental jamming, this paper proposes a navigation signal structure based on wideband frequency hopping (WFH) modulation to enhance both antijamming capability and measurement accuracy. It further introduces the nonstationary effective carrier‐to‐
Chenyang Wang +4 more
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Journal of Sensors, Volume 2026, Issue 1, 2026.Despite the continuous improvement in the technical performance of fiber‐optic early warning systems, their actual application results in preventing third‐party intrusion into oil and gas pipelines are often less than ideal. This issue stems largely from the lack of comprehensive postdeployment evaluation methodologies, making it difficult to identify ...
Liangguo Liu +7 more
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SNR Improvement for Maneuvering Ship Using Weak Echo Under the Condition of Beidou GEO Satellites
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2022 Using global navigation satellite systems as transmitters of opportunity for target detection is a hot issue. The problems of this technology are the restricted power budget provided by navigation satellites and the defocusing caused by the movement of ...
Yan Li, Songhua Yan, J. Gong
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Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.Abstract Valley region irregularities (VRIs) have been previously investigated using radar, ionosonde, and rocket‐borne in situ observations. In this paper, based on a joint observational experiment by lidar and radars performed in Hainan, China, we report a case of low‐latitude VRIs generated in association with uplifted metallic ions for the first ...
Jing Jiao +13 more
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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.
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Tropospheric Propagation Effects Extracted From ADS‐B Messages
Engineering Reports, Volume 7, Issue 12, December 2025.This study explores the use of ADS‐B messages to estimate tropospheric effects, effectively isolating atmospheric influences from interference. The approach enables independent lower atmosphere studies and offers a cost‐free supplementary method for satellite applications, benefiting GNSS systems, especially at low elevation angles where multipath and ...
Alina‐Mihaela Badescu
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An Overview of a Special Issue on Upcoming Positioning, Navigation, and Timing: GPS, GLONASS, Galileo and BeiDou [PDF]
, 2022 Chang‐Ki Hong +2 more
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Energy Science &Engineering, Volume 13, Issue 12, Page 6160-6169, December 2025.ABSTRACT Mountain climbing often involves sudden weather changes, group separation, and mobile device battery depletion, which can lead to life‐threatening emergencies. Enhancing survival and extending rescue time in such situations are crucial, making power supply and emergency equipment essential considerations.
Jian‐Sheng Huang, Li‐Chin Shih
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