Results 61 to 70 of about 11,569 (270)
GNSS e dati geografici costituiscono la quinta infrastruttura primaria globale
GEOmedia, 2014 2014 is the year of the official start of services provided by European Galileo satellite positioning system, and even if a few years late, the expectations for the induction of a rapidly growing market are many, with expected growth more then doubled by
Renzo Carlucci
doaj +2 more sources
Monitoring of the offset between UTC and its prediction broadcast by the GNSS [PDF]
Metrologia 60 065010 (2023)We present a new approach to report in the Section 4 of BIPM Circular T daily values of the offset between UTC and the predictions of UTC broadcast by the GNSS, this quantity we name bUTC_GNSS. In this approach, the determination of UTC - bUTC_GNSS is based on data collected by several multi-GNSS stations in selected time laboratories worldwide.
arxiv +1 more source
Geoscience Data Journal, Volume 12, Issue 2, April 2025.ABSTRACT Landslides represent one of the most prevalent natural disasters worldwide, exerting significant adverse effects on social stability and economic development. Timely and accurate monitoring of landslide changes is crucial for disaster prevention and mitigation.
Mengxi Sun, Hui Cao, Yansong Duan
wiley +1 more source
Precise orbit determination and point positioning using GPS, Glonass, Galileo and BeiDou
Journal of Geodetic Science, 2014 State of the art Precise Point Positioning (PPP) is currently based on dual-frequency processing of GPS and Glonass navigation systems. The International GNSS Service (IGS) is routinely providing the most accurate orbit and clock products for these ...
Tegedor J., Øvstedal O., Vigen E.
doaj +1 more source
LSOS: An FG Position Method Based on Group Phase Ranging Ambiguity Estimation of BeiDou Pseudolite
Remote Sensing, 2023 Due to the influence of indoor space environments, the carrier phase information obtained by the BeiDou pseudo-satellite often has the issue of cycle slips, which makes the user unable to carry out high-precision positioning.
Heng Zhang, Shuguo Pan
doaj +1 more source
First Observation of Ionospheric Plasma Bubble Signatures by Ca+ Lidar at Low Latitude
Geophysical Research Letters, Volume 52, Issue 6, 28 March 2025.Abstract Ionospheric plasma bubbles refer to density depletion structures in the ionosphere, which are usually seen in the electron density profiles observed by radar, and have never been observed in the density profiles of metallic ions. In this letter, we report the first observation of plasma bubble signatures captured by lidar, manifested as ...
Wenjie Sun +12 more
wiley +1 more source
Integrated positioning method of roadheader based on inertial technology
Meitan kexue jishuIn view of the environmental constraints such as long working cycle and large vibration amplitude during the cutting of the roadheader in the fully mechanized excavation face, it is difficult for a single inertial navigation system to realize autonomous,
Lingfei SUN +5 more
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Geophysical Research Letters, Volume 52, Issue 5, 16 March 2025.Abstract An unusual case of a large ionospheric longitudinal gradient in East Asia on 11 May 2021 occurred during a geomagnetically‐quiet period. It shows the largest east‐west difference in electron density at Yamagawa and Wuhan stations when Kp < 2 for 13:00–17:00 LT in 2021.
Yuyan Jin +6 more
wiley +1 more source
Global capabilities of BeiDou Navigation Satellite System [PDF]
Satellite Navigation, 2020 AbstractThe BeiDou Navigation Satellite System (BDS) has completed the constellation deployment and started to provide global services. After achieving the capabilities of global coverage, global first-class accuracy for Positioning, Navigation and Timing (PNT), global Inter-Satellite Links (ISL) networking, and global featured services, BDS will ...
Jun Lu, Xia Guo, Chengeng Su
openaire +3 more sources
CGAN BeiDou Satellite Short-Message-Encryption Scheme Using Ship PVT
Remote Sensing, 2022 The transmission standard and format of short-message communication in the BeiDou satellite-navigation-system are open, the civilian channel adopts a direct-transmission plaintext mechanism, and the content of short messages is at risk of data leaks ...
Sheng Liu, Di Wu, Lanyong Zhang
doaj +1 more source