Special Issue: Dynamics and Structure of the Mesopause Region (DYSMER)
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Meteor observations with an MF radar
Earth, Planets and Space volume 51, pages 691–699 (1999)
Abstract
We conducted meteor echo observations using the Buckland Park MF radar (35°S, 138°E) at 00:40–05:45 LT on October 22, 1997. In addition to the usual full correlation analysis (FCA) technique to measure horizontal wind velocities from 60 to 100 km MF radars have a potential to detect meteor echoes and infer winds through their Doppler frequency shifts. Because of the relatively low radio frequency employed MF radars have a great advantage of providing meteor wind well above 100 km altitude, where very few techniques can measure wind velocities. There is a limitation which should be noted as well. The observations are possible only during night time when the electron density of E-region is low enough for the radio wave to penetrate into the upper region. We detected 233 underdense meteor echoes from 80 km to 120 km with a mean height of 104.4 km. Although the transmitting antenna beams were steered toward off-zenith angles of 25°, almost all the echoes were received outside of the main lobe, indicating that conventional MF radar systems with a broad transmitting beam can work well for meteor observations. Bi-hourly wind profiles were obtained from 94 to 114 km altitudes. The profiles revealed a clear wave structure with a downward phase progression with time. FCA winds from 80 to 100 km were also estimated, and a continuous wind structure was obtained from FCA to meteor heights. Note that the present observations happened to be conducted during a major meteor shower activity. However, a majority of the underdense echoes were from non-shower meteors, and observations during non-shower periods will also yield enough information.
References
Aso, T., T. Tsuda, and S. Kato, Meteor radar observations at Kyoto University, J. Atmos. Terr. Phys., 41, 517–525, 1979.
Baggaley, W. J., Multi frequency studies of radio-meteor train diffusion, Bull. Astron. Inst. Czechosl., 31, 305–308, 1980.
Baggaley, W. J., Single wavelength measurements of the initial radii of radio meteor ionization columns, Bull. Astron. Inst. Czechosl., 32, 345, 1981.
Baggaley, W. J. and T. H. Webb, The geomagnetic control of the diffusion of meteoric ionization, Planet. Space Sci., 28, 997–1001, 1980.
Brown, N., Radio echoes from meteor trains at a radio frequency of 1.98 MHz, J. Atmos. Terr. Phys., 38, 83–87, 1976.
Burrage, M. D., W. R. Skinner, D. A. Gell, P. B. Hays, A. R. Marshall, D. A. Ortland, A. H. Manson, S. J. Franke, D. C. Fritts, P. Hoffman, C. McLandress, R. Niciejewski, F. J. Schmidlin, G. G. Shepherd, W. Singer, T. Tsuda, and R. A. Vincent, Validation of mesosphere and lower thermosphere winds from the high resolution Doppler imager on UARS, J. Geophys. Res., 101, 10,365–10,392, 1996.
Cervera, M. A., W. G. Elford, and D. I. Steel, A new method for the measurement of meteor speeds: The pre-t0 phase technique, Radio Sci., 32, 805–816, 1997.
Holdsworth, D. A., Influence of instrumental effects upon the full correlation analysis, Radio Sci., 34, 643, 1999.
Jones, J. and B. A. Read, The effect of wind shear gradients on underdense radio meteor decay time, Ca. J. Phys., 50, 1277–1281, 1972.
Jones, W., Theory of diffusion of meteor trains in the geomagnetic field, Planet. Space Sci., 39, 1283–1288, 1991.
Jones, W., The decay of radar echoes from meteors with particular reference to their use in the determination of temperature fluctuations near the mesopause, Ann. Geophysicae, 13, 1104–1106, 1995.
Liu, C. H., J. Röttger, G. Dester, S. J. Franke, and C.-J. Pan, The oblique spaced antenna method for measuring the atmospheric wind field, J. Atmos. Ocean. Technol., 6, 26–35, 1991.
McKinley, D. W. R., Meteor Science and Engineering, 309 pp., McGraw-Hill, New York, 1961.
Meek, C. E. and A. H. Manson, MF radar interferometer measurements of meteor trail motions, Radio Sci., 25, 649–655, 1990.
Nakamura, T., T. Tsuda, M. Tsutsumi, K. Kita, T. Uehara, S. Kato, and S. Fukao, Meteor wind observations with the MU radar, Radio Sci., 26, 857–869, 1991.
Nakamura, T., T. Tsuda, S. Fukao, H. Takahashi, P. P. Batista, R. A. Buriti, M. Tsutsumi, M. Ishii, K. Igarashi, H. Fukunishi, Y. Yamada, A. Nomura, T. D. Kawahara, K. Kobayashi, C. Nagasawa, M. Abo, and M. J. Taylor, Studies of the MLT region using the MU radar and simultaneous observations with OH spectrometer and other optical instruments, Adv. Space Res., 19, 643–652, 1997.
Namboothiri, S. P., A. H. Manson, and C. E. Meek, E region real heights and their implications for MF radar-derived wind and tidal climatologies, Radio Sci., 28, 187–202, 1993.
Namboothiri, S. P., A. H. Manson, and C. E. Meek, Extension of MF radar tidal measurements to E-region heights (95–125 km): Saskatoon (52°N, 107°W), Canada, Ann. Geophysicae, 12, 333–341, 1994.
Olsson-Steel, D. and W. G. Elford, The height distribution of radio meteors: observations at 2 MHz, J. Atmos. Terr. Phys., 49, 243–258, 1987.
Poole, L. M. G. and T. R. Roux, Meteor radiant mapping with an all-sky radar, Mon. Not. R. Astr. Sci., 236, 645–652, 1989.
Steel, D. I. and W. G. Elford, The height distribution of radio meteors: comparison of observations at different frequencies on the basis of standard echo theory, J. Atmos. Terr. Phys., 53, 409–417, 1991.
Thomas, R. M., P. S. Whitham, and W. G. Elford, Response of high frequency radar to meteor backscatter, J. Atmos. Terr. Phys., 50, 703–724, 1988.
Tsutsumi, M., T. Tsuda, T. Nakamura, and S. Fukao, Temperature fluctuations near the mesopause inferred from meteor observations with the middle and upper atmosphere radar, Radio Sci., 29, 599–610, 1994.
Tsutsumi, M., T. Tsuda, T. Nakamura, and S. Fukao, Wind Velocity and Temperature Fluctuations due to a Two-day Wave Observed with Radio Meteor Echoes, J. Geophys. Res., 101, 9425–9432, 1996.
Vincent, R. A., MF/HF radar measurements of the dynamics of the mesopause region—A review, J. Atmos. Terr. Phys., 46, 961–974, 1984.
Vincent, R. A., T. Tsuda, and S. Kato, A comparative study of mesospheric solar tides observed at Adelaide and Kyoto, J. Geophys. Res., 93, 699–708, 1988.
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Tsutsumi, M., Holdsworth, D., Nakamura, T. et al. Meteor observations with an MF radar. Earth Planet Sp 51, 691–699 (1999). https://doi.org/10.1186/BF03353227
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DOI: https://doi.org/10.1186/BF03353227