Study of Chance for Good DDA Drift Velocity Estimation for Ionospheric F-region Drift Measurements

0357591 - ÚFA 2011 RIV CZ eng C - Conference Paper (international conference)
Kouba, Daniel - Koucká Knížová, Petra
Study of Chance for Good DDA Drift Velocity Estimation for Ionospheric F-region Drift Measurements.
WDS’10 Proceedings of Contributed Papers: Part II – Physics of Plasmas and Ionized Media. Prague: MATFYZPRESS, 2010 - (Šafránková, J.; Pavlů, J.), s. 194-198. ISBN 978-80-7378-140-8.
[Week of Doctoral Students 2010. Annual Student Conference /19./. Prague (CZ), 01.06.2010-04.06.2010]
R&D Projects: GA AV ČR IAA300420704; GA ČR GA205/06/1267; GA ČR GA205/06/1619
Grant - others:European Union(XE) COST 296 (MIERS)
Institutional research plan: CEZ:AV0Z30420517
Keywords : Drift Velocity * DDA * Estimation * F-region
Subject RIV: DG - Athmosphere Sciences, Meteorology

Estimation of the plasma drift velocity measured by Digisonde depends on the number of reflection points and their distribution. In the paper we divide and analyse plasma drift measurements according to the number of reflection points. A detailed study of Digisonde drift measurement quality has not been published yet. Two extreme groups are selected for further detail analysis, the first one with less than 100 reflection points and the second with more than 800 points. Within the data in these groups we detect annular and diurnal variability. Measurements containing low number of the reflection points occur mainly around equinoxes and during day-time. On the contrary, maximum occurrence of the measurements with more than 800 points is in winter and summer. The lowest chance to register extreme number of the reflections is during afternoon and around sunset.
Permanent Link: http://hdl.handle.net/11104/0195833