Estimation of the nighttime height of the lower ionosphere using VLF waves propagation

Samanes J.; Raulin J.-P.; Jinbin C.

Estimation of the nighttime height of the lower ionosphere using VLF waves propagation

Tipo

Artigo de evento

Data de publicação

2016

Periódico

2016 URSI Asia-Pacific Radio Science Conference, URSI AP-RASC 2016

Citações (Scopus)

2

Autores

Samanes J.
Raulin J.-P.
Jinbin C.

Resumo

© 2016 IEEE.In this paper we study the dynamics of the nighttime lower ionosphere by monitoring daily values of the VLF modal interference distance. This distance depends of the nighttime modes propagating within of Earth-lower ionosphere waveguide, therefore it can provide us information on the behavior of the lower ionosphere in nighttime condition. We have used a long-term database of almost 6 years (2006-2011) from a long transequatorial VLF path. Our results show well defined variability of the nighttime height (hN) in different timescales such as: a) day-to-day variability with maximum variation around 5 km; b) seasonal variability in which hN assumes maximum value around 88.21±0.24, and minimum around 86.89±0.13 km, during north hemisphere winter and summer, respectively. Finally, a preliminary correlation analysis indicates a possible relationship between hN and the long-term solar activity.

Assuntos Scopus

Correlation analysis , Day-to-day variability , Long-term database , Lower ionosphere , Maximum variations , Modal interference , Seasonal variability , Very low frequency