| Author(s): |
Gladek, Yuri C.
;
Sousasantost, Jonas
;
Salles, Lucas Alves
;
Filho, Vicente C. Lima
;
Vani, Bruno C.
;
Moraes, Alison de O.
Total Authors: 6
|
| Document type: | Journal article |
| Source: | AIAA SCITECH 2019 FORUM; v. N/A, p. 12-pg., 2019-01-01. |
| Abstract | |
The presence of large electron densities depletion in the Earth's ionosphere may cause quick variations in the signal amplitude and carrier phase shift of Global Navigation Satellite Systems (GNSS). This phenomenon is called ionospheric scintillation and may cause the degradation or loss of GNSS related services that are widely used by the aeronautic community to increase safety and reduce costs. Equatorial regions, such as most of the Brazilian territory, present great ionospheric scintillation because of the development of instabilities and the Equatorial Ionospheric Anomaly. In this paper, we perform a statistical analysis of the ionospheric effects on the GPS signals, with signal data from monitoring stations in the Brazilian territory to assess the fading in signal amplitude for the civilian GPS signals L1, L2C and L5 during different ionospheric scenarios. We use the alpha - mu distribution to estimate the amplitude distribution of GPS signals in similar geophysical conditions. The data used in this work belong to the CIGALA/CALIBRA network. The data were collected from November 2014 to March 2015, during the summer equinox in the peak of the current solar cycle, period of great ionospheric scintillation occurrence. The results will show that GPS users of new frequencies L2C and L5 are significantly more susceptible to the effects of ionospheric irregularities especially near the crest of Equatorial Ionospheric Anomaly. (AU) | |
| FAPESP's process: | 17/50115-0 - GNSS technology for supporting air navigation |
| Grantee: | Joao Francisco Galera Monico |
| Support Opportunities: | Research Grants - Research in Public Policies |
| FAPESP's process: | 06/04008-2 - GNSS: investigations and applications in geodetic positioning, in studies related to the atmosphere and precision agriculture |
| Grantee: | Joao Francisco Galera Monico |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 18/06158-9 - Statistical Studies of the Variation of Ionospheric Parameters and Their Relationship with Space Weather Events |
| Grantee: | Jonas de Sousa dos Santos |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |