Radar backscatter from underdense meteors and diffusion rates

W Singer, R Latteck, L F Millan, N J Mitchell, J Fiedler

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Citation (Scopus)

Abstract

Many meteoroids burn up between about 120 km and 70 km, deposit metals and dust and form ionized trails which are detected by radars. Model studies about the influence of neutral or positively charged background dust on the ambipolar diffusion indicate that significant smaller decay times should be observed for weak meteor echoes compared to strong meteor echoes which can affect the estimation of temperatures. The variation of meteor decay times in dependence on echo strength, height, and season was studied using radar observations at 69°N, 22°S, and 67°S. Significantly reduced decay times were found for weak echoes below about 88 km at low latitudes throughout the year, and at high latitudes with the exception of summer. In summer at high latitudes, decreasing decay times of weak and strong meteors are observed at altitudes below about 85 km during the appearance of noctilucent clouds. The impact of reduced decay times on the estimation of neutral temperatures from decay times is discussed.
Original languageEnglish
Title of host publicationAdvances in Meteoroid and Meteor Science
EditorsJ M Trigo-Rodriguez, F J M Rietmeijer, J Llorca, D Janches
Place of PublicationNew York, U. S. A.
PublisherSpringer
Pages403-409
ISBN (Print)9780387784182
DOIs
Publication statusPublished - 2008

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meteor
backscatter
radar
dust
polar mesospheric cloud
summer
rate
temperature
metal

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Singer, W., Latteck, R., Millan, L. F., Mitchell, N. J., & Fiedler, J. (2008). Radar backscatter from underdense meteors and diffusion rates. In J. M. Trigo-Rodriguez, F. J. M. Rietmeijer, J. Llorca, & D. Janches (Eds.), Advances in Meteoroid and Meteor Science (pp. 403-409). New York, U. S. A.: Springer. https://doi.org/10.1007/978-0-387-78419-9_56

Radar backscatter from underdense meteors and diffusion rates. / Singer, W; Latteck, R; Millan, L F; Mitchell, N J; Fiedler, J.

Advances in Meteoroid and Meteor Science. ed. / J M Trigo-Rodriguez; F J M Rietmeijer; J Llorca; D Janches. New York, U. S. A. : Springer, 2008. p. 403-409.

Research output: Chapter in Book/Report/Conference proceedingChapter

Singer, W, Latteck, R, Millan, LF, Mitchell, NJ & Fiedler, J 2008, Radar backscatter from underdense meteors and diffusion rates. in JM Trigo-Rodriguez, FJM Rietmeijer, J Llorca & D Janches (eds), Advances in Meteoroid and Meteor Science. Springer, New York, U. S. A., pp. 403-409. https://doi.org/10.1007/978-0-387-78419-9_56
Singer W, Latteck R, Millan LF, Mitchell NJ, Fiedler J. Radar backscatter from underdense meteors and diffusion rates. In Trigo-Rodriguez JM, Rietmeijer FJM, Llorca J, Janches D, editors, Advances in Meteoroid and Meteor Science. New York, U. S. A.: Springer. 2008. p. 403-409 https://doi.org/10.1007/978-0-387-78419-9_56
Singer, W ; Latteck, R ; Millan, L F ; Mitchell, N J ; Fiedler, J. / Radar backscatter from underdense meteors and diffusion rates. Advances in Meteoroid and Meteor Science. editor / J M Trigo-Rodriguez ; F J M Rietmeijer ; J Llorca ; D Janches. New York, U. S. A. : Springer, 2008. pp. 403-409
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