Results 31 to 40 of about 11,569 (270)

A Decentralized Processing Schema for Efficient and Robust Real-time Multi-GNSS Satellite Clock Estimation [PDF]

open access: yes, 2019
Real-time multi-GNSS precise point positioning (PPP) requires the support of high-rate satellite clock corrections. Due to the large number of ambiguity parameters, it is difficult to update clocks at high frequency in real-time for a large reference ...
Ge, Maorong   +4 more
core   +1 more source

Use of supervised machine learning for GNSS signal spoofing detection with validation on real-world meaconing and spoofing data : part I [PDF]

open access: yes, 2020
The vulnerability of the Global Navigation Satellite System (GNSS) open service signals to spoofing and meaconing poses a risk to the users of safety-of-life applications.
De Wilde, Wim   +3 more
core   +3 more sources

The Ionospheric Scintillation Effects on the BeiDou Signal Receiver [PDF]

open access: yesSensors, 2016
Irregularities in the Earth’s ionosphere can make the amplitude and phase of radio signals fluctuate rapidly, which is known as ionospheric scintillation. Severe ionospheric scintillation could affect the performance of the Global Navigation Satellite System (GNSS). Currently, the Multiple Phase Screen (MPS) technique is widely used in solving problems
Zhijun He, Hongbo Zhao, Wenquan Feng
openaire   +3 more sources

La nuova rete GNSS multicostellazione dell’Umbria

open access: yesGEOmedia, 2019
The GPSUMBRIA permanent station network (Umbria region, central Italy), renewed in all its components, is the first GNSS network in Italy and among the first in the world to provide positioning services on four constellations (GPS, GLONASS, GALILEO and ...
Fabio Radicioni, Aurelio Stoppini
doaj   +3 more sources

Ambiguity resolution performance with GPS and BeiDou for LEO formation flying [PDF]

open access: yes, 2014
The evolving BeiDou Navigation Satellite System constellation brings new opportunities for high-precision applications. In this contribution the focus will be on one such application, namely precise and instantaneous relative navigation of a formation of
Teunissen, Peter, Verhagen, S.
core   +1 more source

MTAGCN: predicting miRNA-target associations in Camellia sinensis var. assamica through graph convolution neural network

open access: yesBMC Bioinformatics, 2022
Background MircoRNAs (miRNAs) play a central role in diverse biological processes of Camellia sinensis var.assamica (CSA) through their associations with target mRNAs, including CSA growth, development and stress response.
Haisong Feng   +4 more
doaj   +1 more source

ANALYSIS OF URBAN FOREST CARBON SEQUESTRATION CAPACITY: A CASE STUDY OF ZENGDU, SUIZHOU [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
Carbon-fixing and oxygen-releasing is an important content of forest ecosystem serving in city. Analysis of forest ecosystem carbon sequestration capacity can provide scientific reference for urban forest management strategies.
X. Yu, H. Wang, W. Cai, Y. Han
doaj   +1 more source

SNR degradation in GNSS-R measurements under the effects of radio-frequency interference [PDF]

open access: yes, 2016
©2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new ...
Alonso Arroyo, Alberto   +5 more
core   +2 more sources

Research on Modeling Weighted Average Temperature Based on the Machine Learning Algorithms

open access: yesAtmosphere, 2023
In response to the nonlinear fitting difficulty of the traditional weighted average temperature (Tm) modeling, this paper proposed four machine learning (ML)-based Tm models.
Kai Li   +5 more
doaj   +1 more source

A passive satellite deorbiting strategy for MEO using solar radiation pressure and the J2 effect [PDF]

open access: yes, 2011
The growing population of space debris poses a serious risk to the future of space flight. To effectively manage the increase of debris in orbit, end-of life disposal has become a key requirement for future missions.
Colombo, Camilla   +2 more
core   +1 more source

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