Radio Science

    1. You have free access to this content
      Media responsible for Faraday rotation: A review

      D. Oberoi and C. J. Lonsdale

      Version of Record online: 7 NOV 2012 | DOI: 10.1029/2012RS004992

      Key Points

      • A survey of the Faraday rotation of cosmic radiation due to intervening plasma
      • At low radio frequencies ionosphere-plasmasphere led to 100s-1000s of degrees of FR
      • Its calibration will be a prerequisite for sensitive, high fidelity observations
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      Using the Murchison Widefield Array to observe midlatitude space weather

      Anthea Coster, David Herne, Philip Erickson and Divya Oberoi

      Version of Record online: 12 SEP 2012 | DOI: 10.1029/2012RS004993

      Key Points

      • MWA observations are uniquely suited for study of ionospheric irregularities
      • MWA tracks of linearly polarized beacon on DMSP-15
      • Storm enhanced density and TIDs observed in Western Australia
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      Propagation of medium scale traveling ionospheric disturbances at different latitudes and solar cycle conditions

      M. Hernández-Pajares, J. M. Juan, J. Sanz and A. Aragón-Àngel

      Version of Record online: 4 JUL 2012 | DOI: 10.1029/2011RS004951

      Key Points

      • Characterization of MSTID propagation at low, mid and high latitudes
      • Characterization of MSTID propagation for up to more than one solar cycle
      • Comparison of GPS MSTID characterization with other techniques
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      Absolute calibration of a wideband antenna and spectrometer for accurate sky noise temperature measurements

      Alan E. E. Rogers and Judd D. Bowman

      Version of Record online: 4 JUL 2012 | DOI: 10.1029/2011RS004962

      Key Points

      • Absolute calibration of antenna and spectrometer for sky noise measurements
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      VLSS redux: Software improvements applied to the Very Large Array Low-Frequency Sky Survey

      W. M. Lane, W. D. Cotton, J. F. Helmboldt and N. E. Kassim

      Version of Record online: 28 JUN 2012 | DOI: 10.1029/2011RS004941

      Key Points

      • Improved ionospheric calibration software is available
      • We have reprocessed the VLSS with this software
      • The data have been used for improved ionospheric analysis
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      Very large array observations of disturbed ion flow from the plasmasphere to the nighttime ionosphere

      J. F. Helmboldt and H. T. Intema

      Version of Record online: 13 JUN 2012 | DOI: 10.1029/2012RS004979

      Key Points

      • We found evidence of a disturbed flow from the plasmasphere to the ionosphere
      • This flow is associated with localized ionospheric depletions
      • It is also associated with weak, medium-size ionospheric disturbances
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      High-precision measurements of ionospheric TEC gradients with the Very Large Array VHF system

      J. F. Helmboldt, T. J. W. Lazio, H. T. Intema and K. F. Dymond

      Version of Record online: 16 FEB 2012 | DOI: 10.1029/2011RS004883

      Key Points

      • The VLA can detect TEC fluctuations <0.001 TECU in amplitude
      • The VLA can simultaneously observe large and small scale ionospheric structure
      • VLA-developed techniques can be used to inform designs of future arrays