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Akademický článek

Empirical Mode Decomposition of the atmospheric wave field

Autor: A. J. McDonald, A. J. G. Baumgaertner, G. J. Fraser, S. E. George, S. Marsh

Publikováno v: Annales Geophysicae, Vol 25, Pp 375-384 (2007)

This study examines the utility of the Empirical Mode Decomposition (EMD) time-series analysis technique to separate the horizontal wind field observed by the Scott Base MF radar (78° S, 167° E) into its constituent parts made up of the mean win

Externí odkaz: https://doaj.org/article/afbbd06564c14b46be6c45485d666021

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Akademický článek

A Wide Field Auroral Imager (WFAI) for low Earth orbit missions

Autor: N. P. Bannister, E. J. Bunce, S. W. H. Cowley, R. Fairbend, G. W. Fraser, F. J. Hamilton, J. S. Lapington, J. E. Lees, M. Lester, S. E. Milan, J. F. Pearson, G. J. Price, R. Willingale

Publikováno v: Annales Geophysicae, Vol 25, Pp 519-532 (2007)

A comprehensive understanding of the solar wind interaction with Earth's coupled magnetosphere-ionosphere system requires an ability to observe the charged particle environment and auroral activity from the same platform, generating particle and p

Externí odkaz: https://doaj.org/article/525f251a226844eaaef624a5ce9ac79e

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Akademický článek

The effect of precipitation on wind-profiler clear air returns

Autor: A. J. McDonald, T. K. Carey-Smith, D. A. Hooper, G. J. Fraser, B. P. Lublow

Publikováno v: Annales Geophysicae, Vol 22, Pp 3959-3970 (2004)

A small number of studies have indicated that reductions in the signal strength of clear air returns can be observed at low altitudes in regions of precipitation. This study uses data from the NERC MST radar facility in Aberystwyth (52.4° N, 4.1�

Externí odkaz: https://doaj.org/article/deed39b5f2744bbb85f3c49c4a912a8d

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Akademický článek

A comparison between mesospheric wind measurements made near Christchurch (44°S, 173°E) using the high resolution doppler imager (HRDI) and a medium frequency (MF) radar

Autor: D. J. Frame, B. N. Lawrence, G. J. Fraser, M. D. Burrage

Publikováno v: Annales Geophysicae, Vol 18, Pp 555-565 (2000)

We report on the comparison of winds measured by a medium frequency (MF) radar near Christchurch, New Zealand, and by the high resolution doppler imager (HRDI). Previous comparisons have demonstrated that there can be significant differences in th

Externí odkaz: https://doaj.org/article/96e80f8261514a2bbf25b983e6155b4d

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Akademický článek

A new technique for evaluating mesospheric momentum balance utilizing radars and satellite data

Autor: D. J. Frame, B. N. Lawrence, G. J. Fraser, R. A. Vincent, A. Dudhia

Publikováno v: Annales Geophysicae, Vol 18, Pp 478-484 (2000)

A new method for evaluating momentum balance in the mesosphere using radar and satellite data is presented. This method is applied to radar wind data from two medium frequency installations (near Adelaide, Australia and Christchurch, New Zealand)

Externí odkaz: https://doaj.org/article/1b6655d60714487fa1c2f374886f4e98

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Akademický článek

Spontaneous coherent microwave emission and the sawtooth instability in a compact storage ring

Autor: U. Arp, G. T. Fraser, A. R. Hight Walker, T. B. Lucatorto, K. K. Lehmann, K. Harkay, N. Sereno, K.-J. Kim

Publikováno v: Physical Review Special Topics. Accelerators and Beams, Vol 4, Iss 5, p 054401 (2001)

Strong evidence for self-excited emission of coherent synchrotron radiation in the microwave spectral region was observed at the Synchrotron Ultraviolet Radiation Facility (SURF III) electron storage ring at the NIST. The microwave emission between 2

Externí odkaz: https://doaj.org/article/fda7899e9a4a4b1284acc753b07de741

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