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SIIA Público
SISTEMA INTEGRAL DE INFORMACIÓN ACADÉMICA - PÚBLICO
Título del libro: 2017 Progress In Electromagnetics Research Symposium - Spring (piers) Título del capítulo: Possible Enhancements of TEC and Their Effects on Radio Propagation in Mexican Region
In this paper, we study the enhancements of the total electron content
(TEC) according to maps GIM (JPL) in the period of minimum solar
activity (2006-2009). The difference from previous papers is the choice
of the Mexican region, the observation period. The total electron
content of the ionosphere was selected as a parameter. It was revealed
76 positive cases and found that the TEC enhancements appear already at
Dst 20 nT. The largest number of cases is related to Dst 40 nT. There is
a certain linear trend showing an increase in the maximum deviations in
the amplification of the disturbance, but the dispersion of the values
is large and the correlation is absent. Enhancement factors for TEC are
in the range 1.1-2.15 with a mean of 1.46. Maximum relative deviations
of TEC are in range from 20 to 120% with a mean of 46.4%. The presence
of positive events was confirmed by data of CHAMP satellite. The global
distribution of the TEC allowed obtaining longitudinal width of the
enhancement, which depends on latitude, season, geomagnetic conditions.
Comparison of the appearance of positive events and enhancement factors
in adjacent areas reveals in some cases significant differences,
highlighting the need for local monitoring of TEC.
