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Analysis of the variability in the raindrop size distribution and its effect on attenuation at 20-40 GHz


Reference:

Townsend, A. J., Watson, R. J. and Hodges, D. D., 2009. Analysis of the variability in the raindrop size distribution and its effect on attenuation at 20-40 GHz. IEEE Antennas and Wireless Propagation Letters, 8, pp. 1210-1213.

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    Official URL:

    http://dx.doi.org/10.1109/LAWP.2009.2035724

    Abstract

    A key problem in determining the level of attenuation from the rainfall rate is the considerable variability in the raindrop size distribution. This letter investigates the effects of the variability of the raindrop size distribution (DSD) on the estimation of specific attenuation. Disdrometer data from three sites in the U. K. were analyzed to derive the three parameters (D-m, mu, and N-w) of the normalized gamma distribution. The statistics of the parameters were analyzed as a function of time of year and rainfall intensity. From the raindrop size distribution data, the impact on attenuation at 20-40 GHz was investigated. A simple model to quantify the uncertainty of the raindrop size distribution has been created. Finally, we have shown qualitatively that differences between measured and modeled attenuation can partly be explained by uncertainty in the raindrop size distribution. Furthermore, we also show that although the model for mean attenuation is relatively constant, the standard deviation is much more variable even for sites in close proximity.

    Details

    Item Type Articles
    CreatorsTownsend, A. J., Watson, R. J. and Hodges, D. D.
    DOI10.1109/lawp.2009.2035724
    DepartmentsFaculty of Engineering & Design > Electronic & Electrical Engineering
    Publisher Statementtownsend-8-2009.pdf: Copyright © 2009 IEEE. Reprinted from IEEE Antennas and Wireless Propagation Letters. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bath’s products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
    RefereedYes
    StatusPublished
    ID Code17284

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