Millimeter Wave Scattering And Propagation In Rain: A Computational Study At 94 And 140 Ghz For Oblate Spheroidal And Spherical Raindrops

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    Abstract

    Electromagnetic scattering from raindrops at 94 and 140 GHz frequencies is investigated. The differences in the scattering properties of spherical and oblate spheroidal model raindrops are illustrated for side and vertical incidence cases. Various backscattering and propagation parameters are evaluated using the Marshall-Palmer, Joss thunderstorm, and Joss drizzle drop size distributions. The Doppler spectrum at vertical incidence is substantially affected by the model raindrop shape. The radar reflectivity η and the specific attenuation AH, where the subscript H denotes horizontal polarization, are not significantly affected. For side incidence, the ratio of the reflectivities at horizontal and vertical polarizations is negligibly small, less than 0.12 dB, and almost independent of the rainfall rate R. On the other hand, specific differential attenuation (δ4) and phase shift (δπ) show considerable variation with the rainfall rate. Power-law relationships of the form X = aRb are derived for X = AH, δA, and. Linear relationships between δπ and R are also generated for the three drop size distribution models.

    Original languageEnglish (US)
    Pages (from-to)593-601
    Number of pages9
    JournalIEEE Transactions on Geoscience and Remote Sensing
    Volume29
    Issue number4
    DOIs
    StatePublished - Jan 1 1991

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    wave scattering
    raindrop
    Millimeter waves
    wave propagation
    Rain
    Scattering
    reflectivity
    polarization
    scattering
    Polarization
    drizzle
    Thunderstorms
    rainfall
    Backscattering
    thunderstorm
    Phase shift
    power law
    Radar
    radar
    rain

    All Science Journal Classification (ASJC) codes

    • Electrical and Electronic Engineering
    • Earth and Planetary Sciences(all)

    Cite this

    @article{9e6d2c78be1446ec9c0d66bc33e90a59,
    title = "Millimeter Wave Scattering And Propagation In Rain: A Computational Study At 94 And 140 Ghz For Oblate Spheroidal And Spherical Raindrops",
    abstract = "Electromagnetic scattering from raindrops at 94 and 140 GHz frequencies is investigated. The differences in the scattering properties of spherical and oblate spheroidal model raindrops are illustrated for side and vertical incidence cases. Various backscattering and propagation parameters are evaluated using the Marshall-Palmer, Joss thunderstorm, and Joss drizzle drop size distributions. The Doppler spectrum at vertical incidence is substantially affected by the model raindrop shape. The radar reflectivity η and the specific attenuation AH, where the subscript H denotes horizontal polarization, are not significantly affected. For side incidence, the ratio of the reflectivities at horizontal and vertical polarizations is negligibly small, less than 0.12 dB, and almost independent of the rainfall rate R. On the other hand, specific differential attenuation (δ4) and phase shift (δπ) show considerable variation with the rainfall rate. Power-law relationships of the form X = aRb are derived for X = AH, δA, and. Linear relationships between δπ and R are also generated for the three drop size distribution models.",
    author = "Kultegin Aydin",
    year = "1991",
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    doi = "10.1109/36.135821",
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    T1 - Millimeter Wave Scattering And Propagation In Rain

    T2 - A Computational Study At 94 And 140 Ghz For Oblate Spheroidal And Spherical Raindrops

    AU - Aydin, Kultegin

    PY - 1991/1/1

    Y1 - 1991/1/1

    N2 - Electromagnetic scattering from raindrops at 94 and 140 GHz frequencies is investigated. The differences in the scattering properties of spherical and oblate spheroidal model raindrops are illustrated for side and vertical incidence cases. Various backscattering and propagation parameters are evaluated using the Marshall-Palmer, Joss thunderstorm, and Joss drizzle drop size distributions. The Doppler spectrum at vertical incidence is substantially affected by the model raindrop shape. The radar reflectivity η and the specific attenuation AH, where the subscript H denotes horizontal polarization, are not significantly affected. For side incidence, the ratio of the reflectivities at horizontal and vertical polarizations is negligibly small, less than 0.12 dB, and almost independent of the rainfall rate R. On the other hand, specific differential attenuation (δ4) and phase shift (δπ) show considerable variation with the rainfall rate. Power-law relationships of the form X = aRb are derived for X = AH, δA, and. Linear relationships between δπ and R are also generated for the three drop size distribution models.

    AB - Electromagnetic scattering from raindrops at 94 and 140 GHz frequencies is investigated. The differences in the scattering properties of spherical and oblate spheroidal model raindrops are illustrated for side and vertical incidence cases. Various backscattering and propagation parameters are evaluated using the Marshall-Palmer, Joss thunderstorm, and Joss drizzle drop size distributions. The Doppler spectrum at vertical incidence is substantially affected by the model raindrop shape. The radar reflectivity η and the specific attenuation AH, where the subscript H denotes horizontal polarization, are not significantly affected. For side incidence, the ratio of the reflectivities at horizontal and vertical polarizations is negligibly small, less than 0.12 dB, and almost independent of the rainfall rate R. On the other hand, specific differential attenuation (δ4) and phase shift (δπ) show considerable variation with the rainfall rate. Power-law relationships of the form X = aRb are derived for X = AH, δA, and. Linear relationships between δπ and R are also generated for the three drop size distribution models.

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