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Evaluation of the gnss positioning performance under influence of the ionospheric scintillation
(2020-01-01)
The ionosphere may not only degrade the accuracy of the GNSS positioning but also reduce its availability because there is a high dependence between signal losses and ionospheric irregularities. Irregularities in the Earth’s ...
Modelagem em tempo real do erro sistemático das observáveis GPS devido à ionosfera
(2006-01-01)
Single frequency GPS receivers have been many used in GPS surveys. Among the several applications, one can mention those that are to obtain the receiver's antenna coordinates in real time. One of the main error sources to ...
Numerical simulations to assess ART and MART performance for ionospheric tomography of chapman profiles
(2017-07-01)
The incomplete geometrical coverage of the Global Navigation Satellite System (GNSS) makes the ionospheric tomographic system an ill-conditioned problem for ionospheric imaging. In order to detect the principal limitations ...
Assessment of gps/glonass point positioning in Brazilian regions with distinct ionospheric behavior
(2020-01-01)
Nowadays GPS (Global Positioning System) and GLONASS (GLObal NAvigation Satellite System) are the main systems of GNSS (Global Navigation Satellite Systems), also composed by Galileo and BeiDou. After a long period of ...
Impact and synergies of GIM error estimates on the VTEC interpolation and single-frequency PPP at low latitude region
(2022-04-01)
The vertical total electron content (VTEC) is one of the key quantities to describe variations of the ionosphere and can be provided to users to correct the ionospheric disturbances for GNSS (Global Navigation Satellite ...
A measure of ionospheric irregularities: zonal velocity and its implications for L-band scintillation at low-latitudes
(2021-09-01)
We estimate the zonal drift velocity of small-scale ionospheric irregularities at low latitude by leveraging the spaced-receivers technique applied to two GNSS receivers for scintillation monitoring installed along the ...
S4index: Does it only measure ionospheric scintillation?
(2018-01-01)
The study of ionospheric scintillation has played a critical role in ionospheric research and also in satellite positioning. This is due to the growing influence of GNSS in navigation and remote sensing activities and also ...