Radio and meteor science outcomes from comparisons of meteor radar observations at AMISR Poker Flat, Sondrestrom, and Arecibo

J. D. Mathews, S. J. Briczinski, D. D. Meisel, C. J. Heinselman

    Research output: Contribution to journalArticle

    19 Scopus citations

    Abstract

    Radio science and meteor physics issues regarding meteor "head-echo" observations with high power, large aperture (HPLA) radars, include the frequency and latitude dependency of the observed meteor altitude, speed, and deceleration distributions. We address these issues via the first ever use and analysis of meteor observations from the Poker Flat AMISR (PFISR: 449.3 MHz), Sondrestrom (SRF: 1,290 MHz), and Arecibo (AO: 430 MHz) radars. The PFISR and SRF radars are located near the Arctic Circle while AO is in the tropics. The meteors observed at each radar were detected and analyzed using the same automated FFT periodic micrometeor searching algorithm. Meteor parameters (event altitude, velocity, and deceleration distributions) from all three facilities are compared revealing a clearly defined altitude "ceiling effect" in the 1,290 MHz results relative to the 430/449.3 MHz results. This effect is even more striking in that the Arecibo and PFISR distributions are similar even though the two radars are over 2,000 times different in sensitivity and at very different latitudes, thus providing the first statistical evidence that HPLA meteor radar observations are dominated by the incident wavelength, regardless of the other radar parameters. We also offer insights into the meteoroid fragmentation and "terminal" process.

    Original languageEnglish (US)
    Pages (from-to)365-372
    Number of pages8
    JournalEarth, Moon and Planets
    Volume102
    Issue number1-4
    DOIs
    StatePublished - Jun 1 2008

    All Science Journal Classification (ASJC) codes

    • Astronomy and Astrophysics
    • Earth and Planetary Sciences (miscellaneous)
    • Space and Planetary Science

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