Ventral-aspect radar cross sections and polarization patterns of insects at X band and their relation to size and form

V. A. Drake, J. W. Chapman, K. S. Lim, D. R. Reynolds, J. R. Riley, A. D. Smith

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    A data set of ventral-aspect insect radar cross-sections (RCSs) and polarization patterns, measured at X band (9.4 GHz, linear polariza-tion) in laboratory rigs, has been collated from a number of sources. The data have been analysed to identify relationships between RCS parameters (one representing size and two the polarization-pattern shape) and the insects’ masses and morphological dimensions and forms. An improved mass-estimation relationship, with appropriate asymptotes for very small and very large insects, is presented. This relationship draws only on the RCS size parameter and it is shown that incorporating one or both of the RCS shape parameters provides little additional benefit. Small insects have polarization-pattern shapes that fall within a relatively limited region of the range of parameter values allowed by electromagnetic scattering theory. Larger insects have shapes that extend beyond this region, following a broad trajectory as size and mass increases; at masses above ~0.6 g, the pattern becomes ‘perpendicular’, withmaxima whenthe E-field is orthogonal to the body axis rather than parallel to it. RCS shape can be used to infer morphological form for small insects (<80 mg), but not for larger ones. These results are consistent with observations from X-band vertical-beam entomological radars and provide a basis for identification, at least to broad taxon classes, of the targets detected by such radars.

    Original languageEnglish
    Pages (from-to)5022-5044
    Number of pages23
    JournalInternational Journal of Remote Sensing
    Volume38
    Issue number18
    DOIs
    Publication statusPublished - 17 Sep 2017

    Fingerprint

    polarization
    cross section
    radar
    insect
    trajectory
    scattering
    parameter

    Cite this

    Drake, V. A. ; Chapman, J. W. ; Lim, K. S. ; Reynolds, D. R. ; Riley, J. R. ; Smith, A. D. / Ventral-aspect radar cross sections and polarization patterns of insects at X band and their relation to size and form. In: International Journal of Remote Sensing. 2017 ; Vol. 38, No. 18. pp. 5022-5044.
    @article{0361fabc25714ec989814fc4b60c021c,
    title = "Ventral-aspect radar cross sections and polarization patterns of insects at X band and their relation to size and form",
    abstract = "A data set of ventral-aspect insect radar cross-sections (RCSs) and polarization patterns, measured at X band (9.4 GHz, linear polariza-tion) in laboratory rigs, has been collated from a number of sources. The data have been analysed to identify relationships between RCS parameters (one representing size and two the polarization-pattern shape) and the insects’ masses and morphological dimensions and forms. An improved mass-estimation relationship, with appropriate asymptotes for very small and very large insects, is presented. This relationship draws only on the RCS size parameter and it is shown that incorporating one or both of the RCS shape parameters provides little additional benefit. Small insects have polarization-pattern shapes that fall within a relatively limited region of the range of parameter values allowed by electromagnetic scattering theory. Larger insects have shapes that extend beyond this region, following a broad trajectory as size and mass increases; at masses above ~0.6 g, the pattern becomes ‘perpendicular’, withmaxima whenthe E-field is orthogonal to the body axis rather than parallel to it. RCS shape can be used to infer morphological form for small insects (<80 mg), but not for larger ones. These results are consistent with observations from X-band vertical-beam entomological radars and provide a basis for identification, at least to broad taxon classes, of the targets detected by such radars.",
    author = "Drake, {V. A.} and Chapman, {J. W.} and Lim, {K. S.} and Reynolds, {D. R.} and Riley, {J. R.} and Smith, {A. D.}",
    year = "2017",
    month = "9",
    day = "17",
    doi = "10.1080/01431161.2017.1320453",
    language = "English",
    volume = "38",
    pages = "5022--5044",
    journal = "International Joural of Remote Sensing",
    issn = "0143-1161",
    publisher = "Taylor and Francis Ltd.",
    number = "18",

    }

    Ventral-aspect radar cross sections and polarization patterns of insects at X band and their relation to size and form. / Drake, V. A.; Chapman, J. W.; Lim, K. S.; Reynolds, D. R.; Riley, J. R.; Smith, A. D.

    In: International Journal of Remote Sensing, Vol. 38, No. 18, 17.09.2017, p. 5022-5044.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Ventral-aspect radar cross sections and polarization patterns of insects at X band and their relation to size and form

    AU - Drake, V. A.

    AU - Chapman, J. W.

    AU - Lim, K. S.

    AU - Reynolds, D. R.

    AU - Riley, J. R.

    AU - Smith, A. D.

    PY - 2017/9/17

    Y1 - 2017/9/17

    N2 - A data set of ventral-aspect insect radar cross-sections (RCSs) and polarization patterns, measured at X band (9.4 GHz, linear polariza-tion) in laboratory rigs, has been collated from a number of sources. The data have been analysed to identify relationships between RCS parameters (one representing size and two the polarization-pattern shape) and the insects’ masses and morphological dimensions and forms. An improved mass-estimation relationship, with appropriate asymptotes for very small and very large insects, is presented. This relationship draws only on the RCS size parameter and it is shown that incorporating one or both of the RCS shape parameters provides little additional benefit. Small insects have polarization-pattern shapes that fall within a relatively limited region of the range of parameter values allowed by electromagnetic scattering theory. Larger insects have shapes that extend beyond this region, following a broad trajectory as size and mass increases; at masses above ~0.6 g, the pattern becomes ‘perpendicular’, withmaxima whenthe E-field is orthogonal to the body axis rather than parallel to it. RCS shape can be used to infer morphological form for small insects (<80 mg), but not for larger ones. These results are consistent with observations from X-band vertical-beam entomological radars and provide a basis for identification, at least to broad taxon classes, of the targets detected by such radars.

    AB - A data set of ventral-aspect insect radar cross-sections (RCSs) and polarization patterns, measured at X band (9.4 GHz, linear polariza-tion) in laboratory rigs, has been collated from a number of sources. The data have been analysed to identify relationships between RCS parameters (one representing size and two the polarization-pattern shape) and the insects’ masses and morphological dimensions and forms. An improved mass-estimation relationship, with appropriate asymptotes for very small and very large insects, is presented. This relationship draws only on the RCS size parameter and it is shown that incorporating one or both of the RCS shape parameters provides little additional benefit. Small insects have polarization-pattern shapes that fall within a relatively limited region of the range of parameter values allowed by electromagnetic scattering theory. Larger insects have shapes that extend beyond this region, following a broad trajectory as size and mass increases; at masses above ~0.6 g, the pattern becomes ‘perpendicular’, withmaxima whenthe E-field is orthogonal to the body axis rather than parallel to it. RCS shape can be used to infer morphological form for small insects (<80 mg), but not for larger ones. These results are consistent with observations from X-band vertical-beam entomological radars and provide a basis for identification, at least to broad taxon classes, of the targets detected by such radars.

    UR - http://www.scopus.com/inward/record.url?scp=85031042371&partnerID=8YFLogxK

    U2 - 10.1080/01431161.2017.1320453

    DO - 10.1080/01431161.2017.1320453

    M3 - Article

    VL - 38

    SP - 5022

    EP - 5044

    JO - International Joural of Remote Sensing

    JF - International Joural of Remote Sensing

    SN - 0143-1161

    IS - 18

    ER -