Zobrazeno 1 - 10
of 321
pro vyhledávání: '"J A, Pickett"'
Publikováno v:
Geoscientific Instrumentation, Methods and Data Systems, Vol 3, Iss 1, Pp 21-27 (2014)
The Cluster wide-band data (WBD) plasma wave receiver mounted on each of the four Cluster spacecraft obtains high time resolution waveform data in the frequency range of ~70 Hz to 577 kHz. In order to make measurements above 77 kHz, it uses frequency
Externí odkaz:
https://doaj.org/article/4e6e2e67bff1415593366f9199b5bf7a
Autor:
K. H. Yearby, J. S. Pickett
We review important advances in the understanding of auroral kilometric radiation (AKR) resulting from observations by the Wideband Data instruments on the four Cluster spacecraft. AKR is an intense radio emission originating in the Earth's auroral r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7236a5fe5d1acf0f27665d2a8cab3015
Autor:
J. S. Pickett, L.-J. Chen, O. Santolík, S. Grimald, B. Lavraud, O. P. Verkhoglyadova, B. T. Tsurutani, B. Lefebvre, A. Fazakerley, G. S. Lakhina, S. S. Ghosh, B. Grison, P. M. E. Décréau, D. A. Gurnett, R. Torbert, N. Cornilleau-Wehrlin, I. Dandouras, E. Lucek
Publikováno v:
Nonlinear Processes in Geophysics, Vol 16, Iss 3, Pp 431-442 (2009)
Electrostatic Solitary Waves (ESWs) have been observed by several spacecraft in the current layers of Earth's magnetosphere since 1982. ESWs are manifested as isolated pulses (one wave period) in the high time resolution waveform data obtained on the
Externí odkaz:
https://doaj.org/article/673fd266b8dd45259c8b2ad48f029dea
Autor:
O. Santolik, E. Macusova, E. E. Titova, B. V. Kozelov, D. A. Gurnett, J. S. Pickett, V. Y. Trakhtengerts, A. G. Demekhov
Publikováno v:
Annales Geophysicae, Vol 26, Pp 1665-1670 (2008)
Whistler-mode chorus is a structured wave emission observed in the Earth's magnetosphere in a frequency range from a few hundreds of Hz to several kHz. We investigate wave packets of chorus using high-resolution measurements recorded by the WBD i
Externí odkaz:
https://doaj.org/article/1161e0dc03584d9ea38c9ef6ab97fe8e
Publikováno v:
Nonlinear Processes in Geophysics, Vol 12, Iss 3, Pp 321-336 (2005)
Alfvén waves, discontinuities, proton perpendicular acceleration and magnetic decreases (MDs) in interplanetary space are shown to be interrelated. Discontinuities are the phase-steepened edges of Alfvén waves. Magnetic decreases are caused by a di
Externí odkaz:
https://doaj.org/article/100b19641d5f4f05b1b648f7aec13c38
Autor:
J. S. Pickett, L.-J. Chen, S. W. Kahler, O. Santolík, M. L. Goldstein, B. Lavraud, P. M. E. Décréau, R. Kessel, E. Lucek, G. S. Lakhina, B. T. Tsurutani, D. A. Gurnett, N. Cornilleau-Wehrlin, A. Fazakerley, H. Rème, A. Balogh
Publikováno v:
Nonlinear Processes in Geophysics, Vol 12, Iss 2, Pp 181-193 (2005)
Through case studies involving Cluster waveform observations, solitary waves in the form of bipolar and tripolar pulses have recently been found to be quite abundant in the near-Earth dayside magnetosheath. We expand on the results of those previous
Externí odkaz:
https://doaj.org/article/214d4f9e26324632889e9cff40d52c48
Publikováno v:
Annales Geophysicae, Vol 22, Pp 2597-2606 (2004)
Chorus emissions are often observed by the STAFF spectrum analyser on board the 4 satellites of CLUSTER. This instrument provides the cross spectral matrix of three magnetic and two electric field components. Dedicated software processes this spec
Externí odkaz:
https://doaj.org/article/b37ea372246e42038df7c6a0798702f9
Publikováno v:
Annales Geophysicae, Vol 22, Pp 2337-2344 (2004)
We present the statistics of Langmuir wave amplitudes in the Earth's foreshock using Cluster Wideband Data (WBD) Plasma Wave Receiver electric field waveforms from spacecraft 2, 3 and 4 on 26 March 2002. The largest amplitude Langmuir waves were o
Externí odkaz:
https://doaj.org/article/ad5515afecf14b4cb9b816cdaf0c4ed4
Publikováno v:
Annales Geophysicae, Vol 22, Pp 2555-2563 (2004)
In this case study we investigate the source region of whistler-mode chorus located close to the geomagnetic equator at a radial distance of 4.4 Earth radii. We use measurements from the four Cluster spacecraft at separations of less than a few
Externí odkaz:
https://doaj.org/article/00c3fc8bd1f94dcca51d261fe0e0af2f
Autor:
J. S. Pickett, L.-J. Chen, S. W. Kahler, O. Santolík, D. A. Gurnett, B. T. Tsurutani, A. Balogh
Publikováno v:
Annales Geophysicae, Vol 22, Pp 2515-2523 (2004)
Isolated electrostatic structures are observed throughout much of the 4RE by 19.6RE Cluster orbit. These structures are observed in the Wideband plasma wave instrument's waveform data as bipolar pulses (one positive and one negative peak in the el
Externí odkaz:
https://doaj.org/article/13758fd91f234b8e926474050d67032f