Results 21 to 30 of about 1,544 (147)
A GIVE Prediction Method in SBAS Based on GAT‐TCN
Space Weather, Volume 23, Issue 11, November 2025.Abstract A Grid Ionospheric Vertical Error (GIVE) prediction model based on GAT‐TCN is proposed in this paper. The model integrates the Graph Attention Network (GAT) with the Temporal Convolutional Network to enhance prediction accuracy while ensuring the integrity of the Satellite‐Based Augmentation System, thereby improving its availability.
Hao Zhang +8 more
wiley +1 more source
Pembuatan Program Ekstraksi Dan Penentuan Posisi Satelit Dari File Navigation Rinex Versi 2.10 [PDF]
, 2015 In positioning using the GPS the first step that we must do is calculating the satellite position during the observation. The precision of a point in a GPS survey is affected by the precision of the satellite position that recorded in the observation ...
Rahmat, V. (Vauzul) +2 more
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Ionospheric Disturbances During the 4 December 2015, Mt. Etna Eruption
Earth and Space Science, Volume 12, Issue 10, October 2025.Abstract This study presents the detection and characterization of co‐volcanic ionospheric disturbances (CVIDs) associated with Mt. Etna's large‐scale lava fountain (Italy). Leveraging a dense and proximal GNSS network, we identify local Total Electron Content (TEC) perturbations extending up to ∼ ${\sim} $200 km south/southwest of the vent.
F. Ferrara +7 more
wiley +1 more source
Real‐Time Regional Ionosphere Modeling With RFR‐Net Over China
Space Weather, Volume 23, Issue 8, August 2025.Abstract The mid‐to‐low‐latitude ionosphere, influenced by phenomena such as the Equatorial Ionization Anomaly, responds more sensitively to changes in solar activity, which negatively affect the transmission of various electromagnetic signals. Moreover, next‐generation technologies, particularly Precise Point Positioning‐Real‐Time Kinematic (PPP‐RTK),
Mengfei Sun +9 more
wiley +1 more source
Networked differential GPS system [PDF]
, 1994 An embodiment of the present invention relates to a worldwide network of differential GPS reference stations (NDGPS) that continually track the entire GPS satellite constellation and provide interpolations of reference station corrections tailored for ...
Kalafus, Rudolph M. +3 more
core +1 more source
Design of the broadcast ephemerides for the Lunar Communication and Navigation Services system
Progress in Earth and Planetary ScienceAbstract The last few years have brought extensive growth of interest in the Earth’s natural satellite—the Moon. The lunar surface, especially the surroundings of its south pole, is supposed to become a getaway for space exploration including Mars in the first place.
Grzegorz Bury +2 more
openaire +2 more sources
The Benefit of Space Clocks for the Deep Space Network
Radio Science, Volume 60, Issue 8, August 2025.Abstract Ground‐based atomic clocks have been the foundation of the Deep Space Network's (DSN's) ability to provide high‐precision tracking to deep space users for navigation and radio science since its inception in the mid‐1960s. This paper describes the development of space clocks that could aid the DSN and the solar system exploration enterprise ...
T. Ely, E. Burt, K. Cheung, R. Tjoelker
wiley +1 more source
Investigation on the Impact of Tropospheric Delay on GPS Height Variation near the Equator
, 2009 One of the major problems currently facing satellite-based positioning is the atmospheric refraction of the GPS signal caused by the troposphere. The tropospheric effect is much more pronounced at the equatorial region due to its hot and wet conditions ...
Dodo, Joseph D +2 more
core +1 more source
Engineering Reports, Volume 7, Issue 7, July 2025.Some stations have slightly larger errors in mid low latitude regions, while others have slightly smaller errors in high latitude regions. By comparing the B1C/B2a and B2b/B3I IFC SPP results of all 84 stations, it was found that the RMSE of all stations with B2b/B3I IFC was greater than that of B1C/B2a. ABSTRACT This article analyzes the BDS Phase III
Xingli Sun, Jinjie Yao
wiley +1 more source
Differential GPS for small UAS using consumer-grade single-frequency receivers [PDF]
, 2013 Consumer-grade single-frequency GPS receivers with their known limitations are the predominant means of localization for small Unmanned Aircraft Systems (UAS).
Bolting, Jan +2 more
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