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    Rain attenuation statistics at Ka-band estimated from weather radar observations in Belgium

    Authors
    Lukach, Maryna
    Quibus, Laurent
    Vanhoenacker-Janvier, Danielle
    Delobbe, Laurent
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    Discipline
    Earth and related Environmental sciences
    Audience
    Scientific
    Date
    2018-06-26
    Publisher
    John Wiley & Sons
    Metadata
    Show full item record
    Description
    This paper presents rain attenuation statistics for satellite‐ground transmission links at Ka‐band based on 10‐year reflectivity observations from a C‐band weather radar. The ground receiving station and the radar are both located in Belgium. Only precipitation under the freezing level is considered, and the attenuation produced by hail is removed by applying a reflectivity threshold. The radar‐derived attenuations are analyzed to investigate the influence of elevation and azimuthal angles on the attenuation statistics. It is shown that the azimuthal dependence is extremely low. In contrast, the exceedance probability for a given attenuation threshold strongly increases with decreasing elevation angles, as foreseen by ITU‐R recommendations. The radar‐derived attenuations are used to estimate rain attenuation complementary cumulative distribution functions computed according to ITU‐R recommendations for a low Earth orbit satellite. The sensitivity to the hail reflectivity threshold is very limited. In contrast, our results show that reliable attenuation statistics cannot be obtained without taking carefully into account the height of the freezing level. Monthly averages of the freezing levels allow producing satisfactory results, but it is recommended to incorporate freezing level heights with high temporal and spatial resolutions.
    Citation
    Lukach, M, Quibus, L, Vanhoenacker‐Janvier, D, Delobbe, L. Rain attenuation statistics at Ka‐band estimated from weather radar observations in Belgium. Int J Satell Commun Network. 2018; 36: 528– 541. https://doi.org/10.1002/sat.1256
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/7240
    doi: http://dx.doi.org/10.1002/sat.1256
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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