Results 61 to 70 of about 6,207 (200)

Characterization of High‐Frequency GNSS Total Electron Content Variations

open access: yesJournal of Geophysical Research: Space Physics, Volume 131, Issue 10, October 2026.
Abstract Global Navigation Satellite System (GNSS)–derived Total Electron Content (TEC) is widely used to investigate ionospheric variability, but has primarily been applied to low‐frequency fluctuations. Here we present a long‐term statistical characterization of high‐frequency (30–500 mHz) TEC variations using multi‐constellation GNSS data from 11 ...
J. Pérez‐Coll Jiménez   +3 more
wiley   +1 more source

Variation of Global Ionospheric Scintillation and Its Effect on GPS Kinematic PPP‐AR Performance During Geomagnetic Storms in Solar Cycle 25: A Statistical Analysis

open access: yesSpace Weather, Volume 24, Issue 10, October 2026.
Abstract Enhanced small‐scale ionospheric irregularities during geomagnetic storms can disturb Global Navigation Satellite System (GNSS) carrier‐phase tracking and are associated with reduced stability of ambiguity‐fixed precise point positioning (PPP‐AR), but their impact on kinematic positioning remains insufficiently quantified.
Dongsheng Zhao   +7 more
wiley   +1 more source

ScintPi 4.0: A New GNSS‐Based Low‐Cost, Multi‐Constellation, Multi‐Frequency Ionospheric Scintillation and TEC Monitor for Education, Citizen Science, and Research Initiatives

open access: yesSpace Weather, Volume 24, Issue 10, October 2026.
Abstract ScintPi is a series of alternative ionospheric scintillation and total electron content (TEC) monitors. ScintPi monitors have been built by combining single‐board computers (Raspberry Pi) and commercial off‐the‐shelf (COTS) Global Navigation Satellite System (GNSS) receivers.
Isaac G. Wright   +3 more
wiley   +1 more source

ARAIM for Vertical Guidance Using GPS and BeiDou [PDF]

open access: yes, 2013
An advanced Receiver Autonomous Integrity Monitoring (ARAIM) approach is investigated when augmenting GPS satellites with the current regional BeiDou constellation.
Ahmed El-Mowafy (9557050)
core   +2 more sources

GNSS e dati geografici costituiscono la quinta infrastruttura primaria globale

open access: yesGEOmedia, 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

Mapping Space Weather Induced PPP‐AR Uncertainty to UAV Power‐Line Inspection Safety Risk

open access: yesSpace Weather, Volume 24, Issue 10, October 2026.
Abstract Space weather can affect the reliability of satellite‐based positioning and thereby disrupt industrial operations that increasingly depend on Global Navigation Satellite System (GNSS) services. This concern is becoming more relevant with the rapid growth of the low‐altitude economy, where unmanned aerial vehicles (UAVs) are increasingly used ...
Mengfei Sun, Ning Li, Tong Liu
wiley   +1 more source

The visibilities of BeiDou MEO satellites and ground stations.

open access: yes, 2016
The visibilities of BeiDou MEO satellites and ground stations.
Yueke Wang (3095586)   +3 more
core   +1 more source

A time‐stamp calibration method for smart meter data based on interpolated least squares

open access: yesEnergy Conversion and Economics, Volume 7, Issue 5, Page 403-422, October 2026.
Abstract Temporal asynchrony in smart meter data, caused by clock drift and protocol failures, significantly undermines grid state estimation and fault location. Traditional synchronization methods often rely on costly hardware or real‐time protocols and are ineffective for historical data and legacy devices.
Xiaopeng Zhang   +3 more
wiley   +1 more source

Kombinierte Auswertung von Beobachtungen der globalen Satellitennavigationssysteme Beidou und GPS [PDF]

open access: yes, 2014
Increasingly geodetic science applications require reliable, rapid, precise and, ideally, real time positioning capability. With GNSS positioning techniques today's geodesists can expect positioning accuracy ranging from metre-level to mm, depending upon
Li, Qing
core   +1 more source

Crop-GPA: an integrated platform of crop gene-phenotype associations

open access: yesnpj Systems Biology and Applications
With the increasing availability of large-scale biology data in crop plants, there is an urgent demand for a versatile platform that fully mines and utilizes the data for modern molecular breeding.
Yujia Gao   +5 more
doaj   +1 more source

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