Low-altitude meteor trail echoes

Akshay Malhotra, John D. Mathews

    Research output: Contribution to journalArticle

    8 Citations (Scopus)

    Abstract

    We present here the first observations of a new type of meteor echo. These Low-Altitude Trail Echoes (LATE), observed almost exclusively below 90 km altitude using the Jicamarca Research Observatory 50 MHz radar, exhibit very different features and characteristics from the other well studied and reported meteor trails-the specular meteor trails and the Range Spread Trail Echoes. Some of these features include strong altitude dependence, low aspect sensitivity and no gap between the head echo and the trail. Perhaps most importantly, almost 80% of the head echoes below 85 km altitude in our data set exhibit LATE trails. The study of these echoes provides valuable insights into the role of diffusion and plasma instabilities in the formation and evolution of meteor trails.

    Original languageEnglish (US)
    Article numberL21106
    JournalGeophysical Research Letters
    Volume36
    Issue number21
    DOIs
    StatePublished - Nov 1 2009

    Fingerprint

    meteor trails
    low altitude
    meteor
    echoes
    magnetohydrodynamic stability
    meteoroids
    observatory
    radar
    plasma
    observatories

    All Science Journal Classification (ASJC) codes

    • Geophysics
    • Earth and Planetary Sciences(all)

    Cite this

    Malhotra, Akshay ; Mathews, John D. / Low-altitude meteor trail echoes. In: Geophysical Research Letters. 2009 ; Vol. 36, No. 21.
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    title = "Low-altitude meteor trail echoes",
    abstract = "We present here the first observations of a new type of meteor echo. These Low-Altitude Trail Echoes (LATE), observed almost exclusively below 90 km altitude using the Jicamarca Research Observatory 50 MHz radar, exhibit very different features and characteristics from the other well studied and reported meteor trails-the specular meteor trails and the Range Spread Trail Echoes. Some of these features include strong altitude dependence, low aspect sensitivity and no gap between the head echo and the trail. Perhaps most importantly, almost 80{\%} of the head echoes below 85 km altitude in our data set exhibit LATE trails. The study of these echoes provides valuable insights into the role of diffusion and plasma instabilities in the formation and evolution of meteor trails.",
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    Low-altitude meteor trail echoes. / Malhotra, Akshay; Mathews, John D.

    In: Geophysical Research Letters, Vol. 36, No. 21, L21106, 01.11.2009.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Low-altitude meteor trail echoes

    AU - Malhotra, Akshay

    AU - Mathews, John D.

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    AB - We present here the first observations of a new type of meteor echo. These Low-Altitude Trail Echoes (LATE), observed almost exclusively below 90 km altitude using the Jicamarca Research Observatory 50 MHz radar, exhibit very different features and characteristics from the other well studied and reported meteor trails-the specular meteor trails and the Range Spread Trail Echoes. Some of these features include strong altitude dependence, low aspect sensitivity and no gap between the head echo and the trail. Perhaps most importantly, almost 80% of the head echoes below 85 km altitude in our data set exhibit LATE trails. The study of these echoes provides valuable insights into the role of diffusion and plasma instabilities in the formation and evolution of meteor trails.

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