Radio Science

Cover image for Radio Science

August 2011

Volume 46, Issue 4

    1. A new approach for identifying ionospheric backscatter in midlatitude SuperDARN HF radar observations

      A. J. Ribeiro, J. M. Ruohoniemi, J. B. H. Baker, L. B. N. Clausen, S. de Larquier and R. A. Greenwald

      Article first published online: 30 AUG 2011 | DOI: 10.1029/2011RS004676

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      Key Points

      • Improve ionospheric scatter determination in midlatitude SuperDARN data
      • Introduce new technique for classification of HF backscatter types
      • Increase reliability of velocity data from midlatitude SuperDARN
    2. Spatial effects of HF multiple scattering in the ionosphere: Experimental observations

      Nikolay Zabotin and Terence Bullett

      Article first published online: 27 AUG 2011 | DOI: 10.1029/2011RS004645

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      Key Points

      • Multiple scattering is an important factor of ionospheric radio propagation
      • There are several pieces of experimental evidence of the multiple scattering effects
      • Spatial distribution of ionospherically reflected signal conforms to the theory
    3. A rain height model to predict fading due to wet snow on terrestrial links

      K. Paulson and A. Al-Mreri

      Article first published online: 27 AUG 2011 | DOI: 10.1029/2010RS004555

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      Key Points

      • Rain height is increasing over time
      • ITU-R distribution of rain height is poor fit to data
      • Wet snow effects on links change over time
    4. An accurate and efficient algorithm for Faraday rotation corrections for spaceborne microwave radiometers

      Malkiat Singh and Michael H. Bettenhausen

      Article first published online: 25 AUG 2011 | DOI: 10.1029/2010RS004509

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      Key Points

      • Ionospheric effects on microwave radiometers
      • Faraday rotation effects on microwave polarimeters
      • Ionosphere as multiple shells
    5. Worldwide extremely low frequency magnetic field sensor network for sprite studies

      Toby Whitley, Martin Füllekrug, Michael Rycroft, Alec Bennett, Frank Wyatt, Don Elliott, Graham Heinson, Adrian Hitchman, Andrew Lewis, Ramotholo Sefako, Pieter Fourie, Jaci Dyers, Alan Thomson and Simon Flower

      Article first published online: 12 AUG 2011 | DOI: 10.1029/2010RS004523

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      Key Points

      • A global network of intruments cross calibrated to a timing accuracy of ∼30 us
      • The network has a high resolution able to identify ELF sprite characteristics
      • The network will provide unique data for global lightning and sprite studies
    6. Electromagnetic radiation and scattering for a gap in a corner backed by a cavity filled with DNG metamaterial

      Oguzhan Akgol, Danilo Erricolo and Piergiorgio L. E. Uslenghi

      Article first published online: 4 AUG 2011 | DOI: 10.1029/2010RS004471

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      Key Points

      • New canonical solution for an electromagentic scattering problem
      • New physical effects due to the presence of metamaterials
      • May be used to validate computational electromagentic software
    7. Broadband and low-beam squint leaky wave radiation from a uniaxially anisotropic grounded slab

      A. Shahvarpour, C. Caloz and A. Alvarez-Melcon

      Article first published online: 4 AUG 2011 | DOI: 10.1029/2010RS004530

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      Key Points

      • Broadband and low beam squint anisotropic leaky wave antenna
    8. Development of a heterogeneous microwave network fade simulation tool applicable to networks that span Europe

      Kevin S. Paulson and Hafiz Basarudin

      Article first published online: 30 JUL 2011 | DOI: 10.1029/2010RS004608

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      Key Points

      • Joint fade timeseries for microwave networks produced by simulation
      • Simulation of slant paths requires model of melting layer
      • Meteorological inputs to simulator rain field and rain height data
    9. Ionosphere geomagnetic field: Comparison of IGRF model prediction and satellite measurements 1991–2010

      N. A. Matteo and Y. T. Morton

      Article first published online: 29 JUL 2011 | DOI: 10.1029/2010RS004529

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      Key Points

      • The IGRF is suitable for computing GPS error and other signal propagation
      • External fields, diurnal variation, etc. have small impact most of the time
      • Measurement-model misfit under a variety of conditions is examined
    10. Like and cross-polarized scatter cross sections for two-dimensional, multiscale rough surfaces based on a unified full wave variational technique

      Ezekiel Bahar

      Article first published online: 22 JUL 2011 | DOI: 10.1029/2010RS004441

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      Key Points

      • Radar cross sections
      • Two scale models
      • Decomposition of surface height spectral density function
    11. Analytical synthesis technique for linear uniform-amplitude sparse arrays

      D. Caratelli and M. C. Viganó

      Article first published online: 21 JUL 2011 | DOI: 10.1029/2010RS004522

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      Key Points

      • Deterministic antenna placement technique
      • Auxiliary array factor function
      • Synthesis of linear sparse arrays

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