Zobrazeno 1 - 10
of 54
pro vyhledávání: '"R.J. Riddolls"'
Autor:
D Sentman, P Jastrzebski, Paul Kossey, Daniel Bivolaru, M.C. Lee, R.J. Riddolls, S H Lee, Spencer Kuo
Publikováno v:
Physica Scripta. 67:448-452
Modulation of electrojet currents by amplitude-modulated HF heating waves creates ionospheric antenna currents to generate ELF/VLF waves. The dependence of the generation efficiency on the HF heating wave modulation scheme and frequency is studied ex
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f141e1dd8af351b27199b596836f48ad
https://doi.org/10.1238/physica.regular.067a00448
https://doi.org/10.1238/physica.regular.067a00448
Autor:
E. M. C. Klien, M.C. Lee, Spencer Kuo, A. X. Zhang, Michael P. Sulzer, William J. Burke, R.J. Riddolls, B. Isham
Publikováno v:
Geophysical Research Letters. 26:37-40
HF heating offers a powerful technique for controlled studies of ionospheric plasma turbulence. Heater waves generate large plasma density depletions and sheet-like ionospheric irregularities in the F region, which can give rise to spread F backscatt
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09885c0969b89908dac63a7213ef82fc
https://doi.org/10.1029/1998gl900266
https://doi.org/10.1029/1998gl900266
Publikováno v:
Geophysical Research Letters. 25:3067-3070
Large-scale ionospheric plasma irregularities, generated by O-mode heater waves at Arecibo, are shown for the first time to have “sheet-like” structures. The irregularities are aligned with the magnetic meridional plane and have scale sizes rangi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94a99b355fe79073fc98fe8b3186dad2
https://doi.org/10.1029/98gl02322
https://doi.org/10.1029/98gl02322
Publikováno v:
Journal of Atmospheric and Solar-Terrestrial Physics. 60:965-973
Laboratory experiments have been conducted at MIT, using the student-built Versatile Toroidal Facility (VTF), to investigate some ionospheric plasma effects produced by lightning-induced whistler waves. Lower hybrid waves, generated by the lightning-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9916d810252470a944fe9496aabe190d
https://doi.org/10.1016/s1364-6826(98)00045-5
https://doi.org/10.1016/s1364-6826(98)00045-5
Autor:
M.C. Lee, Spencer Kuo, M.J. Rowlands, Michael P. Sulzer, William J. Burke, R.J. Riddolls, E. M. C. Klien
Publikováno v:
Geophysical Research Letters. 25:579-582
During recent experiments ionospheric plasma bubbles were excited by the upgraded HF heater at Arecibo. These plasma bubbles were observed by radar in the midnight sector with the entire flux tube in darkness. A simple model is outlined to explain th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cc63879a9779d24104307cf4fb7aae87
https://doi.org/10.1029/98gl00327
https://doi.org/10.1029/98gl00327
Autor:
M.C. Lee, N.E. Dalrymple, D.T. Moriarty, K. D. Vilece, Spencer Kuo, M.J. Rowlands, Michael P. Sulzer, K. M. Groves, R.J. Riddolls
Publikováno v:
Geophysical Research Letters. 24:115-118
Laboratory experiments at MIT using the Versatile Toroidal Facility (VTF) have produced “cascading” and “frequency-upshifted” spectra of HF wave-enhanced Langmuir waves resembling the spectra observed in Arecibo experiments. The VTF experimen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::21c98e43c7eba14dcda0f40cf7f676bf
https://doi.org/10.1029/96gl03886
https://doi.org/10.1029/96gl03886
Publikováno v:
MILCOM 2008 - 2008 IEEE Military Communications Conference.
The use of Frank waveform codes in radar applications is well known. These codes are phase modulation based, with the number of phase steps dependent on the order of the code. Amplitude shaping techniques are applied to the modulation bits to reduce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3353325950339530284df4139fd90787
https://doi.org/10.1109/milcom.2008.4753092
https://doi.org/10.1109/milcom.2008.4753092
Autor:
R.J. Riddolls
Publikováno v:
2008 IEEE Radar Conference.
A high frequency (HF) radar system comprising a skywave transmit channel and surface wave receive channel is studied. Simple analytic expressions for the resolution of this radar system are determined by considering the spreading of radar signals in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf2593b1aa56c58315137a1a364dbdde
https://doi.org/10.1109/radar.2008.4720866
https://doi.org/10.1109/radar.2008.4720866
Autor:
R.J. Riddolls
Publikováno v:
2006 IEEE Conference on Radar.
The increasing use of high frequency surface wave radar (HFSWR) for the surveillance of coastal regions is faced with the problem of limited channel availability in the electromagnetic spectrum. Thus there is a need for multiple radars to share a com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ba3eae3ad591f49c35422484b1367bb6
https://doi.org/10.1109/radar.2006.1631879
https://doi.org/10.1109/radar.2006.1631879
Publikováno v:
IEEE Conference Record - Abstracts. 1996 IEEE International Conference on Plasma Science.
Summary form only given, as follows. We will present some recent results of our laboratory experiments at MIT, using a large plasma device known as the versatile toroidal facility (VTF). These experiments are aimed at cross-checking our ionospheric p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c6de6e8534d7c3b63d2d1aaca12a8ac5
https://doi.org/10.1109/plasma.1996.551662
https://doi.org/10.1109/plasma.1996.551662