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Klobuchar and nequick g ionospheric models comparison for multi-gnss single-frequency code point positioning in the Brazilian region
(2019-01-01)
One of the main error sources in GNSS positioning comes from the ionosphere, an atmospheric layer that stays in the signal path between the satellite and the receiver. For single frequency positioning, the ionospheric ...
Multivariate analysis of combined GPS/GLONASS point positioning performance in Brazilian regions under different ionospheric conditions
(2019-06-01)
The development of Global Navigation Satellite Systems (GNSS) was a revolution in activities related to positioning. Currently, GLONASS (Global'naya Navigatsionnaya Sputnikovaya Sistema) and GPS (Global Positioning System) ...
The impact of single windows on trade
(John Wiley & Sons Inc, 2020-02-11)
This paper is the first that quantifies the impact of single windows (SWs) on international trade globally. SWs function as a single point of entry and exit of the goods traded internationally and are therefore intended ...
Ionospheric Equatorial Plasma Bubble effects on L1 single frequency code GPS positioning using precise ephemerides
(2021-01-01)
Amplitude and phase variations of Global Navigation Satellite Systems (GNSS) radio signals used by the aeronautic community occur due to ionospheric irregularities (ionospheric scintillation), which may cause the degradation ...
Análise e comparação do comportamento da ionosfera e do posicionamento por ponto em períodos de alta e baixa atividade solar
(Universidade Federal do Paraná (UFPR), Centro Politecnico, 2009-07-01)
The ionosphere is a major source of systematic error in the GPS observables. As this error is directly proportional to the TEC (Total Electron Content), the quality of GPS positioning (especially with single frequency ...
Análise e comparação do comportamento da ionosfera e do posicionamento por ponto em períodos de alta e baixa atividade solar
(Universidade Federal do Paraná (UFPR), Centro Politecnico, 2009-07-01)
The ionosphere is a major source of systematic error in the GPS observables. As this error is directly proportional to the TEC (Total Electron Content), the quality of GPS positioning (especially with single frequency ...