Radio Science


  1. Research Articles

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    2. Research Articles
    1. Ray tracing technique for global 3-D modeling of ionospheric electron density using GNSS measurements (pages 539–553)

      Mohamad Mahdi Alizadeh, Harald Schuh and Michael Schmidt

      Article first published online: 28 JUN 2015 | DOI: 10.1002/2014RS005466

      Key Points

      • Ionosphere modeling, Global Navigation Satellite Systems, ray tracing technique, and Formosat-3/Cosmic
    2. Switched-beam array of dielectric rod antenna with RF-MEMS switch for millimeter-wave applications (pages 177–190)

      M. W. Rousstia, A. C. F. Reniers and M. H. A. J. Herben

      Article first published online: 12 MAR 2015 | DOI: 10.1002/2014RS005471

      Key Points

      • The coupling between the array element is sufficiently low
      • Uniform antenna performance is observed for every scan angle
      • High-gain and low sidelobe level antenna is realized
    3. Time and frequency transfer system using GNSS receiver (pages 1171–1182)

      Jia-Lun Wang, Shi-Yu Huang and Chia-Shu Liao

      Article first published online: 5 DEC 2014 | DOI: 10.1002/2014RS005460

      Key Points

      • The GPS time link accuracy can achieve within 2 ns in long-baseline link 10,000 km
      • The system has less than 25 ns and 1.1 × 10–13 uncertainty for time and frequency
      • Proposed system provides unbroken time and frequency link tracing back to SI
    4. TaiWan Ionospheric Model (TWIM) prediction based on time series autoregressive analysis (pages 977–986)

      L. C. Tsai, Ernest P. Macalalad and C. H. Liu

      Article first published online: 23 OCT 2014 | DOI: 10.1002/2014RS005448

      Key Points

      • A time series autoregressive model was developed to forecast the ionosphere
      • The 3-D and global TaiWan Ionospheric Model (TWIM) was improved to be real time
      • The TWIM exhibits vertical Chapman layers and horizontal spherical harmonics
    5. A focusing reflectarray and its application in microwave virus sanitizer (pages 890–898)

      Wan-Ting Hung, Jen-Jung Tung and Shih-Yuan Chen

      Article first published online: 9 OCT 2014 | DOI: 10.1002/2014RS005481

      Key Points

      • A focusing reflectarray is proposed for use in microwave virus sanitizer
      • Design details of the proposed focusing reflectarray are discussed
      • An 8 GHz prototype design is fabricated, and its feasibility is also verified
    6. Spatial distribution and temporal variations of occurrence frequency of lightning whistlers observed by VLF/WBA onboard Akebono (pages 753–764)

      Yuta Oike, Yoshiya Kasahara and Yoshitaka Goto

      Article first published online: 15 SEP 2014 | DOI: 10.1002/2014RS005523

      Key Points

      • Lightning whistlers in the plasmasphere were statistically analyzed
      • Lightning whistlers were mainly observed in the L shell region below 2
      • Occurrence of the whistlers has clear diurnal and seasonal dependence
    7. You have full text access to this OnlineOpen article
      Greenland telescope project: Direct confirmation of black hole with sub-millimeter VLBI (pages 564–571)

      M. Inoue, J. C. Algaba-Marcos, K. Asada, R. Blundell, W. Brisken, R. Burgos, C.-C. Chang, M.-T. Chen, S. S. Doeleman, V. Fish, P. Grimes, J. Han, H. Hirashita, P. T. P. Ho, S.-N. Hsieh, T. Huang, H. Jiang, E. Keto, P. M. Koch, D. Y. Kubo, C.-Y. Kuo, B. Liu, P. Martin-Cocher, S. Matsushita, Z. Meyer-Zhao, M. Nakamura, P. Napier, H. Nishioka, G. Nystrom, S. Paine, N. Patel, N. Pradel, H.-Y. Pu, P. A. Raffin, H.-Y. Shen, W. Snow, R. Srinivasan and T.-S. Wei

      Article first published online: 30 JUL 2014 | DOI: 10.1002/2014RS005450

      Key Points

      • A submm telescope is coordinated to establish it at the Summit of Greenland
      • Black Hole shadow imaging is the primary target for the submm VLBI
      • The Summit shows low opacity at 225 GHz and is expected excellent up to THz regime

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