Radio Science

Cover image for Vol. 48 Issue 4

July/August 2013

Volume 48, Issue 4

Pages 359–469

  1. Regular Articles

    1. Top of page
    2. Regular Articles
    1. Joint optimization of sensing threshold and transmission power in wideband cognitive radio with energy detection (pages 359–370)

      Xin Liu, Guoan Bi, Min Jia, Yong Liang Guan, Weizhi Zhong and Rui Lin

      Article first published online: 15 JUL 2013 | DOI: 10.1002/rds.20043

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      Key Points

      • A wideband cognitive radio (CR) system
      • A joint optimization of sensing threshold and transmission power
      • Proposed algorithm can achieve desirable improvement on throughput
    2. You have full text access to this OnlineOpen article
      The use of reflected GPS signals to retrieve ocean surface wind speeds in tropical cyclones (pages 371–387)

      Stephen J. Katzberg, Jason Dunion and George G. Ganoe

      Article first published online: 18 JUL 2013 | DOI: 10.1002/rds.20042

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      Key Points

      • GPS reflection provides better than 5 m/s wind speed retrievals in hurricanes.
      • Certain limitations are identified.
    3. In situ irregularity identification and scintillation estimation using wavelets and CINDI on C/NOFS (pages 388–395)

      R. A. Stoneback, R. A. Heelis, R. G. Caton, Y.-J. Su and K. M. Groves

      Article first published online: 2 AUG 2013 | DOI: 10.1002/rds.20050

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      Key Points

      • Wavelets are used to characterize density irregularities
      • Density perturbations used for in-situ scintillation estimate
      • In-situ scintillation estimate compared with SCINDA observations
    4. A study of intense ionospheric scintillation observed during a quiet day in the East African low-latitude region (pages 396–405)

      Chigomezyo M. Ngwira, Jeff Klenzing, Joseph Olwendo, Florence M. D'ujanga, Russell Stoneback and Paul Baki

      Article first published online: 6 AUG 2013 | DOI: 10.1002/rds.20045

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      Key Points

      • Examine the occurrence of intense scintillations
      • Deep plasma depletions associated with intense scintillations
      • C/NOFS data provides evidence of strong upward drift velocities
    5. Broadband slot array antenna with full-space steerable pattern in a composite right/left-handed waveguide (pages 406–415)

      María Navarro-Tapia, Jaime Esteban and Carlos Camacho-Peñalosa

      Article first published online: 9 AUG 2013 | DOI: 10.1002/rds.20046

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      Key Points

      • A better understanding of the CRLH waveguide technology is provided
      • The properties of a longitudinal slot on a CRLH waveguide are analyzed
    6. Development of a passive VHF radar system using software-defined radio for equatorial plasma instability studies (pages 416–426)

      B. Tuysuz, J. Urbina and F. D. Lind

      Article first published online: 9 AUG 2013 | DOI: 10.1002/rds.20047

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      Key Points

      • Development of a passive VHF Radar for equatorial ionospheric irregularities
      • High flexibility of the designed system
      • Location study for the deployment in Peru
    7. A zeppelin experiment to study airborne altimetry using specular Global Navigation Satellite System reflections (pages 427–440)

      A. M. Semmling, J. Wickert, S. Schön, R. Stosius, M. Markgraf, T. Gerber, M. Ge and G. Beyerle

      Article first published online: 15 AUG 2013 | DOI: 10.1002/rds.20049

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      Key Points

      • A GNSS Reflectometry setup is presented for airborne altimetry
      • A spectral retrieval yields decimeter precision validated with in situ data
      • Phase data is retrieved for precise resolution of residuals
    8. Statistical comparison of TEC derived from GPS and ISR observations at high latitudes (pages 441–452)

      Roman A. Makarevich and Michael J. Nicolls

      Article first published online: 15 AUG 2013 | DOI: 10.1002/rds.20055

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      Key Points

      • Statistical investigation of TEC observed with GPS and PFISR
      • Behavior of TEC and its residuals is examined
      • Closest agreement is observed for largest GPS elevations and smallest distances
    9. Modeling of the perfect electromagnetic conducting boundary in the finite difference time domain method (pages 453–462)

      Vahid Nayyeri, Mohammad Soleimani and Mojtaba Dehmollaian

      Article first published online: 20 AUG 2013 | DOI: 10.1002/rds.20051

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      Key Points

      • The perfect electromagnetic conducting boundary is modeled in the FDTD method.
      • The original FDTD cell is modified and a new algorithm is proposed
      • Electromagnetic wave scattering from an arbitrary PEMC boundary is addressed.
    10. Ionospheric observations of underground nuclear explosions (UNE) using GPS and the Very Large Array (pages 463–469)

      Jihye Park, Joseph Helmboldt, Dorota A. Grejner-Brzezinska, Ralph R. B. von Frese and Thomas L. Wilson

      Article first published online: 20 AUG 2013 | DOI: 10.1002/rds.20053

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      Key Points

      • Detection on Underground nuclear explosions (UNE)
      • Ionospheric responses of UNEs
      • New detection methods of UNEs

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