High-altitude radar meteors observed at Jicamarca Radio Observatory using a multibaseline interferometric technique

Boyi Gao, John David Mathews

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    A new unambiguous, multibaseline interferometric technique was recently employed for meteor observations at Jicamarca Radio Observatory (JRO). These observations largely confirm high-altitude radar meteors (HARMs). The 50 MHz JRO array is arranged in contiguous quarter-arrays (Q) each of which is comprised of 4 X 4 sub-arrays (M), which are referred to as square modules in the Ochs' manual. In these observations the radar transmission was from two quarter-arrays sharing a common diagonal. Signal reception was via three, quarterarray (Q) receivers and three adjacent (M) module receivers all of the same polarization. This arrangement offered the usual Q-Q and M-M interferometric baseline-pairs as well as new Q-M baselines that were rotated ~6° from the Q-Q and M-M baselines. For relatively high signal-to-noise ratio meteors, this arrangement yields ambiguity resolution to the horizon and confirms the existence of HARM events. We report results from 2014 August 4 to 5 observations that include interesting new HARM events and also suggest the meteoric origin of high-altitude, altitude-extended transient events we named 'Dragons' in our earlier report (Gao & Mathews 2015a). We hope to extend this new technique with yet more baselines and higher sensitivity in near future observations.

    Original languageEnglish (US)
    Pages (from-to)4252-4262
    Number of pages11
    JournalMonthly Notices of the Royal Astronomical Society
    Volume452
    Issue number4
    DOIs
    StatePublished - Jul 16 2015

    Fingerprint

    meteoroids
    meteor
    high altitude
    radar
    observatories
    observatory
    radio
    radar transmission
    receivers
    modules
    signal reception
    ambiguity
    signal-to-noise ratio
    horizon
    signal to noise ratios
    polarization
    sensitivity

    All Science Journal Classification (ASJC) codes

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    @article{2917f7e355504f4ea24722d95c5d32c9,
    title = "High-altitude radar meteors observed at Jicamarca Radio Observatory using a multibaseline interferometric technique",
    abstract = "A new unambiguous, multibaseline interferometric technique was recently employed for meteor observations at Jicamarca Radio Observatory (JRO). These observations largely confirm high-altitude radar meteors (HARMs). The 50 MHz JRO array is arranged in contiguous quarter-arrays (Q) each of which is comprised of 4 X 4 sub-arrays (M), which are referred to as square modules in the Ochs' manual. In these observations the radar transmission was from two quarter-arrays sharing a common diagonal. Signal reception was via three, quarterarray (Q) receivers and three adjacent (M) module receivers all of the same polarization. This arrangement offered the usual Q-Q and M-M interferometric baseline-pairs as well as new Q-M baselines that were rotated ~6° from the Q-Q and M-M baselines. For relatively high signal-to-noise ratio meteors, this arrangement yields ambiguity resolution to the horizon and confirms the existence of HARM events. We report results from 2014 August 4 to 5 observations that include interesting new HARM events and also suggest the meteoric origin of high-altitude, altitude-extended transient events we named 'Dragons' in our earlier report (Gao & Mathews 2015a). We hope to extend this new technique with yet more baselines and higher sensitivity in near future observations.",
    author = "Boyi Gao and Mathews, {John David}",
    year = "2015",
    month = "7",
    day = "16",
    doi = "10.1093/mnras/stv1548",
    language = "English (US)",
    volume = "452",
    pages = "4252--4262",
    journal = "Monthly Notices of the Royal Astronomical Society",
    issn = "0035-8711",
    publisher = "Oxford University Press",
    number = "4",

    }

    High-altitude radar meteors observed at Jicamarca Radio Observatory using a multibaseline interferometric technique. / Gao, Boyi; Mathews, John David.

    In: Monthly Notices of the Royal Astronomical Society, Vol. 452, No. 4, 16.07.2015, p. 4252-4262.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - High-altitude radar meteors observed at Jicamarca Radio Observatory using a multibaseline interferometric technique

    AU - Gao, Boyi

    AU - Mathews, John David

    PY - 2015/7/16

    Y1 - 2015/7/16

    N2 - A new unambiguous, multibaseline interferometric technique was recently employed for meteor observations at Jicamarca Radio Observatory (JRO). These observations largely confirm high-altitude radar meteors (HARMs). The 50 MHz JRO array is arranged in contiguous quarter-arrays (Q) each of which is comprised of 4 X 4 sub-arrays (M), which are referred to as square modules in the Ochs' manual. In these observations the radar transmission was from two quarter-arrays sharing a common diagonal. Signal reception was via three, quarterarray (Q) receivers and three adjacent (M) module receivers all of the same polarization. This arrangement offered the usual Q-Q and M-M interferometric baseline-pairs as well as new Q-M baselines that were rotated ~6° from the Q-Q and M-M baselines. For relatively high signal-to-noise ratio meteors, this arrangement yields ambiguity resolution to the horizon and confirms the existence of HARM events. We report results from 2014 August 4 to 5 observations that include interesting new HARM events and also suggest the meteoric origin of high-altitude, altitude-extended transient events we named 'Dragons' in our earlier report (Gao & Mathews 2015a). We hope to extend this new technique with yet more baselines and higher sensitivity in near future observations.

    AB - A new unambiguous, multibaseline interferometric technique was recently employed for meteor observations at Jicamarca Radio Observatory (JRO). These observations largely confirm high-altitude radar meteors (HARMs). The 50 MHz JRO array is arranged in contiguous quarter-arrays (Q) each of which is comprised of 4 X 4 sub-arrays (M), which are referred to as square modules in the Ochs' manual. In these observations the radar transmission was from two quarter-arrays sharing a common diagonal. Signal reception was via three, quarterarray (Q) receivers and three adjacent (M) module receivers all of the same polarization. This arrangement offered the usual Q-Q and M-M interferometric baseline-pairs as well as new Q-M baselines that were rotated ~6° from the Q-Q and M-M baselines. For relatively high signal-to-noise ratio meteors, this arrangement yields ambiguity resolution to the horizon and confirms the existence of HARM events. We report results from 2014 August 4 to 5 observations that include interesting new HARM events and also suggest the meteoric origin of high-altitude, altitude-extended transient events we named 'Dragons' in our earlier report (Gao & Mathews 2015a). We hope to extend this new technique with yet more baselines and higher sensitivity in near future observations.

    UR - http://www.scopus.com/inward/record.url?scp=84940118226&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84940118226&partnerID=8YFLogxK

    U2 - 10.1093/mnras/stv1548

    DO - 10.1093/mnras/stv1548

    M3 - Article

    AN - SCOPUS:84940118226

    VL - 452

    SP - 4252

    EP - 4262

    JO - Monthly Notices of the Royal Astronomical Society

    JF - Monthly Notices of the Royal Astronomical Society

    SN - 0035-8711

    IS - 4

    ER -