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Radio Science

Cover image for Radio Science

June 2012

Volume 47, Issue 3

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      The impact of space and time averaging on the spatial correlation of rainfall

      L. Luini and C. Capsoni

      Article first published online: 29 JUN 2012 | DOI: 10.1029/2011RS004915

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      Key Points

      • Impact of the space and/or time integration of rain on its spatial correlation
      • Examples of how rainfall spatial correlation can be de-integrated
      • Increase use of meteorological and Earth Observation data for TLC applications
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      Rectangular coils optimization for wireless power transmission

      Zhu Duan, Yong-Xin Guo and Dim-Lee Kwong

      Article first published online: 27 JUN 2012 | DOI: 10.1029/2011RS004970

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      Key Points

      • Calculation of mutual inductance between rectangular coil
      • Optimize the efficiency for power transfer
      • Modeling of lumped component for rectangular coil
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      E-plane radiation pattern analysis of rectangular horn antennas with V-shaped corrugations by UTD-PO formulation

      José-Víctor Rodríguez, Fernando Quesada-Pereira, Leandro Juan-Llácer, Elisa Verdú-Rodríguez, José-María Molina-García-Pardo and Alejandro Álvarez-Melcón

      Article first published online: 23 JUN 2012 | DOI: 10.1029/2011RS004926

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      Key Points

      • UTD-PO method for radiation pattern analysis of rectangular horn antennas
      • Better computational efficiency than existing methods
      • Less mathematical complexity than existing methods
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      Ionospheric and auroral clutter models for HF surface wave and over-the-horizon radar systems

      M. Ravan, R. J. Riddolls and R. S. Adve

      Article first published online: 23 JUN 2012 | DOI: 10.1029/2011RS004944

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      Key Points

      • Ionospheric clutter modeling for HFSWR system
      • Auroral clutter modeling for OTHR system that is suitable for Canada
      • Comparing with measured data and using the models for evaluating STAP algorithms
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      Developing a new mode for observation of ionospheric disturbances by digital ionosonde in ionospheric vertical sounding

      Kun Chen, Zhengping Zhu, Baiqi Ning, Jiaping Lan and Fenglou Sun

      Article first published online: 8 JUN 2012 | DOI: 10.1029/2011RS004968

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      Key Points

      • A new mode for detecting ionospheric disturbances on CADI is described
      • Dopplionogram can be obtained in real time on CADI by phase measurement method
      • The mode is practical and feasible and works stably and reliably
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      Moment method analysis of plane wave scattering from planar corrugated surfaces using parallel-plate cavity Green's functions and derivation of analytic reflection-phase formulas for both polarizations and oblique azimuth planes

      M. Ng Mou Kehn

      Article first published online: 7 JUN 2012 | DOI: 10.1029/2011RS004938

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      Key Points

      • Derive closed form analytic formulas for reflection phase of planar corrugations
      • Reflection-phase formulas as functions of azimuth angle and for both polarizations
      • Full-wave accurate moment method analysis using novel PPW cavity Green's function
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      Difference of scattering geometrical optics components and line integrals of currents in modified edge representation

      Pengfei Lu and Makoto Ando

      Article first published online: 31 MAY 2012 | DOI: 10.1029/2011RS004899

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      Key Points

      • MER is equal to SGO if reflected wave is spherical
      • MER is equal to SGO if incident and observer distances are large enough
      • Difference between MER and SGO has been expressed explicitly in math
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      Analysis of the PLL phase error in presence of simulated ionospheric scintillation events

      B. Forte

      Article first published online: 18 MAY 2012 | DOI: 10.1029/2011RS004790

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      Key Points

      • Signal perturbations due to scintillation were simulated
      • PLL phase error analyzed
      • Losses of lock due to scintillation were analyzed by means of the phase error
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      Prototyping scalable digital signal processing systems for radio astronomy using dataflow models

      N. Sane, J. Ford, A. I. Harris and S. S. Bhattacharyya

      Article first published online: 18 MAY 2012 | DOI: 10.1029/2011RS004924

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      Key Points

      • We introduce dataflow-based prototyping of radio astronomy DSP systems
      • We describe design and implementation of tunable digital downconverter
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      Measurement reduction for mutual coupling calibration in DOA estimation

      Taylan Aksoy and T. Engin Tuncer

      Article first published online: 17 MAY 2012 | DOI: 10.1029/2011RS004904

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      Key Points

      • Mutual coupling calibration for antenna arrays is considered
      • A technique to decrease the number of measurements for calibration is presented
      • It is shown that a single calibration measurement is sufficent for UCA
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      Resolute Bay CADI ionosonde drifts, PolarDARN HF velocities, and cross polar cap potential

      D. Mori, A. V. Koustov, P. T. Jayachandran and N. Nishitani

      Article first published online: 16 MAY 2012 | DOI: 10.1029/2011RS004947

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      Key Points

      • CADI ionosonde velocities statistically agree with PolarDARN radar velocities
      • CADI-PolarDARN consistency implies that CADI velocity is below ExB drift
      • SuperDARN cross polar cap potential is smaller than the CADI potential
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      First simultaneous measurement of vertical air velocity, particle fall velocity, and hydrometeor sphericity in stratiform precipitation: Results from 47 MHz wind-profiling radar and 532 nm polarization lidar observations

      Tomoaki Mega, Masayuki K. Yamamoto, Makoto Abo, Yasukuni Shibata, Hiroyuki Hashiguchi, Noriyuki Nishi, Toyoshi Shimomai, Yoshiaki Shibagaki, Mamoru Yamamoto, Manabu D. Yamanaka, Shoichiro Fukao and Timbul Manik

      Article first published online: 8 MAY 2012 | DOI: 10.1029/2011RS004823

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      Key Points

      • Stratiform precipitation measurement by collocated wind profiler radar and lidar
      • Vertical wind, particle fall velocity, and lidar depolarization were measured
      • Weak precipitation case showed marked contrast with active precipitation case
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      On the distribution of ion density depletion along magnetic field lines as deduced using C/NOFS

      E. Dao, M. C. Kelley, D. L. Hysell, J. M. Retterer, Y.-J. Su, R. F. Pfaff, P. A. Roddy and J. O. Ballenthin

      Article first published online: 1 MAY 2012 | DOI: 10.1029/2011RS004967

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      Key Points

      • We infer the field line integrated density depletion from electric fields
      • The normalized density is non-uniform along plasma depletions
      • The normalized density is more likely weighted near the Appleton anomalies
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      Estimation of radio refractivity using a multiple angle clutter model

      Ali Karimian, Caglar Yardim, William S. Hodgkiss, Peter Gerstoft and Amalia E. Barrios

      Article first published online: 10 APR 2012 | DOI: 10.1029/2011RS004701

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      Key Points

      • Incorporation of information of grazing angle in RFC
      • Multiple angle clutter better than single angle in RFC
      • Statistical analysis of 1998 SPANDAR data with the new model
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      An extremely low profile, compact, and broadband tightly coupled patch array

      E. Irci, K. Sertel and John L. Volakis

      Article first published online: 18 JAN 2012 | DOI: 10.1029/2011RS004771

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      Key Points

      • Broadband antennas are formed using tightly coupled and excited elements
      • The resulting array is an active FSS and is more broadband than EBGs
      • These arrays are also much more broadband than conventional patch antennas

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