ICATE   21876
INSTITUTO DE CIENCIAS ASTRONOMICAS, DE LA TIERRA Y DEL ESPACIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Topside Electron Density profiles: Some comparisons between observations and models
Autor/es:
M. MOSERT
Lugar:
Miramare, Trieste
Reunión:
Workshop; Workshop on Science Applications of GNSS in Developing Contries, followed by the: Seminar on Development and Use of the Ionospheric NeQuick Model; 2012
Institución organizadora:
ICTP
Resumen:
The topside modeling involves two major aspects: The vertical scale height (H) and the profile functions to define profile shape Different techniques have been developed for calculating the vertical scale height(a) Calculating H from GPS derived TEC (Jakowski et al., 2002; Stankov et al., 2003), (b) Obtaining the Chapman H from ground-based ionosonde measurements (Huang and Reinisch, 2001, 2007), (c) Calculating H from topside sounder data. Depuev and Pulinets (2004) used data from the Intercosmos 19 satellite and (The IRI-2001 (Bilitza, 2001) topside formulation is based on the approach to model the profile using different sections with nearly constant gradients. The analytical representation of the profile as a function of the height is an exponential layer modulated by the Booker function, which is suitable the topside to a few kilometers above the peak, overestimating the upper part of the topside profile.Many efforts have been done to provide effective solutions(Coisson et al., 2002; Depuev and Pulinets, 2004, Bilitza,2004; Coisson and Radicella, 2005, among others).The new IRI 2007 version includes two new options for the topside electron density profile in addition to the old option (IRI-2001).d) NeQuick computed H varying with height based on empirical parameters(k parameter) The cases presented in this analysis indicate that the two IRI new options for the topside electron density formulation (Nequick and IRI-2001 corr) reproduce better the observations than the old IRI-2001 description. These results are in agreement with those presented by others researchers.