Meteor radar measurements of mean winds and tides over Collm (51.3° N, 13° E) and comparison with LF drift measurements 2005–2007

[摘要] An all-sky VHF meteor radar (MR) has been continuously operated at Collm(51.3° N, 13° E) since summer 2004. The radar measures meteorparameters, diffusion coefficients, and horizontal winds in the mesopauseregion. There exists a temporal overlap of the MR wind measurements withco-located low-frequency (LF) ionospheric drift measurements until 2007.Comparison of MR and LF semidiurnal tidal phases allows to empiricallydetermine the virtual height overestimation of LF reflection heights due tothe group retardation of LF waves. LF reference heights have to be reducedby up to 20 km to match real heights. Correction of LF heights for groupretardation allows to determine the wind underestimation by the LF methodcompared with meteor radar measurements and opens the possibility tocontinue long-term trend analysis using mesosphere/lower thermosphere winds.

[学科分类] 电子、光学、磁材料