ARS Advances in Radio Science ARS Adv. Radio Sci. 1684-9973 Copernicus Publications Göttingen, Germany 10.5194/ars-9-335-2011 Meteor radar measurements of mean winds and tides over Collm (51.3° N, 13° E) and comparison with LF drift measurements 2005–2007 Jacobi C. 1 Institute for Meteorology, University of Leipzig, Stephanstr. 3, 04103 Leipzig, Germany 01 08 2011 9 335 341 Copyright: © 2011 C. Jacobi 2011 This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/ This article is available from https://ars.copernicus.org/articles/9/335/2011/ars-9-335-2011.html The full text article is available as a PDF file from https://ars.copernicus.org/articles/9/335/2011/ars-9-335-2011.pdf

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

 References Bilitza, D.: International Reference Ionosphere 2000, Radio Sci., 36, 261–275, 2001. Bilitza, D. and Reinisch, B.: International Reference Ionosphere 2007: Improvements and new parameters, Adv. Space Res., 42, 599–609, 2008. Groves, G. V.: A theory for determining upper-atmosphere winds from radio observations on meteor trails, J. Atmos. Terr. Phys., 16, 344–356, 1959. Hall, C. M., Aso, T., Tsutsumi, M., Nozawa, S., Manson, A. H., and Meek, C. E.: A comparison of mesosphere and lower thermosphere neutral winds as determined by meteor and medium-frequency radar at 70° N. Radio Sci., 40, RS4001, https://doi.org/10.1029/2004RS003102, 2005. Hocking, W. K. and Thayaparan, T.: Simultaneous and collocated observations of winds and tides by MF and meteor radars over London, Canada (43° N, 81° W), during 1994–1996, Radio Sci., 2, 833–865, 1997. Hocking, W. K., Fuller, B., and Vandepeer, B.: Real-time determination of meteor-related parameters utilizing modern digital technology, J. Atmos. Solar-Terr. Phys., 63, 155–169, 2001. Jacobi, C., Portnyagin, Y. I., Solovjova, T. V., Hoffmann, P., Singer, W., Fahrutdinova, A. N., Ishmuratov, R. A., Beard, A. G., Mitchell, N. J., Muller, H. G., Schminder, R., Kürschner, D., Manson A. H., and Meek, C. E.: Climatology of the semidiurnal tide at 52° N–56° N from ground-based radar wind measurements 1985–1995, J. Atmos. Solar-Terr. Phys., 61, 975–991, 1999. Jacobi, C., Arras, C., Kürschner, D., Singer, W., Hoffmann, P., and Keuer, D.: Comparison of mesopause region meteor radar winds, medium frequency radar winds and low frequency drifts over Germany, Adv. Space Res., 43, 247–252, 2009. Jacobi, C. and Kürschner, D.: Long-term trends of MLT region winds over Central Europe, Phys. Chem. Earth, 31, 16–21, 2006. Kürschner D.: Ein Beitrag zur statistischen Analyse hochatmosphärischer Winddaten aus bodengebundenen Messungen, Z. Meteorol., 41, 262–266, 1991. Kürschner, D. and Schminder, R.: High-atmosphere wind profiles for altitudes between 90 and 110 km obtained from D1 LF measurements over central Europe in 1983/1984, J. Atmos. Terr. Phys., 48, 447–453, 1986. Kürschner, D., Schminder, R., Singer, W., and Bremer, J.: Ein neues Verfahren zur Realisierung absoluter Reflexionshöhenmessungen an Raumwellen amplitudenmodulierter Rundfunksender bei Schrägeinfall im Langwellenbereich als Hilfsmittel zur Ableitung von Windprofilen in der oberen Mesopausenregion, Z. Meteorol., 37, 322–332, 1987. Kürschner, D. and Jacobi, C.: The mesopause region wind field over Central Europe in 2003 and comparison with a long-term climatology, Adv. Space Res., 35, 1981–1986, 2005. Manson, A. H., Meek, C. E., Hall, C. M., Nozawa, S., Mitchell, N. J., Pancheva, D., Singer, W., and Hoffmann, P.: Mesopause dynamics from the scandinavian triangle of radars within the PSMOS-DATAR Project, Ann. Geophys., 22, 367–386, https://doi.org/10.5194/angeo-22-367-2004, 2004. Placke, M., Hoffmann, P., Becker, E., Jacobi, C., Singer, W., and Rapp, M.: Gravity wave momentum fluxes in the MLT – Part II: Meteor radar investigations at high and midlatitudes in comparison with modeling studies, J. Atmos. Solar-Terr. Phys., https://doi.org/10.1016/j.jastp.2010.05.007, 2011. Stober, G., Jacobi, C., Fröhlich, K., and Oberheide, J.: Meteor radar temperatures over Collm (51.3° N, 13° E). Adv. Space Res., 42, 1253–1258, 2008. Zhao, G., Libo, L., Wan, W., Ning, B., Xiong, J.: Seasonal behavior of meteor radar winds over Wuhan, Earth Planets Space, 57, 61–70, 2005.