Search Results - "DJUTH, F. T"

Temporal Development of HF-Excited Langmuir and Ion Turbulence at Arecibo by Djuth, F. T., DuBois, D. F.

“…The Arecibo high-power, high-frequency (HF) facility and 430 MHz radar are used to examine the temporal development of the HF-induced Langmuir and ion…”
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Arecibo's thermospheric gravity waves and the case for an ocean source by Djuth, F. T., Zhang, L. D., Livneh, D. J., Seker, I., Smith, S. M., Sulzer, M. P., Mathews, J. D., Walterscheid, R. L.

“…Wave‐like disturbances in electron density ne have been observed in the thermosphere above Arecibo Observatory, Puerto Rico throughout its 45 year history…”
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A continuum of gravity waves in the Arecibo thermosphere? by Djuth, F. T., Sulzer, M. P., Gonzáles, S. A., Mathews, J. D., Elder, J. H., Walterscheid, R. L.

“…Previous incoherent radar studies at Arecibo Observatory, Puerto Rico have demonstrated that ∼1–3% electron density “imprints” of internal gravity waves are…”
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Continuous quasiperiodic thermospheric waves over Arecibo by Livneh, D. J., Seker, I., Djuth, F. T., Mathews, J. D.

“…Incoherent scatter radar (ISR) power profile observations at Arecibo Observatory (AO) have revealed long vertical wavelength (>100 km) quasi‐coherent waves…”
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Ionospheric modification at twice the electron cyclotron frequency by DJUTH, F. T, PEDERSEN, T. R, GERKEN, E. A, BERNHARDT, P. A, SELCHER, C. A, BRISTOW, W. A, KOSCH, M. J

“…In 2004, a new transmission band was added to the HAARP high-frequency ionospheric modification facility that encompasses the second electron cyclotron…”
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Artificial optical emissions at HAARP for pump frequencies near the third and second electron gyro-harmonic by KOSCH, M. J, PEDERSEN, T, HUGHES, J, MARSHALL, R, GERKEN, E, SENIOR, A, SENTMAN, D, MCCARRICK, M, DJUTH, F. T

“…High-power high-frequency radio waves beamed into the ionosphere cause plasma turbulence, which can accelerate electrons. These electrons collide with the…”
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Creating space plasma from the ground by Carlson, H. C., Djuth, F. T., Zhang, L. D.

“…We have performed an experiment to compare as directly as realizable the ionization production rate by HF radio wave energy versus by solar EUV. We take…”
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Persistent enhancement of the HF pump-induced plasma line measured with a UHF diagnostic radar at HAARP by Oyama, S., Watkins, B. J., Djuth, F. T., Kosch, M. J., Bernhardt, P. A., Heinselman, C. J.

“…Plasma lines excited by a powerful, high‐frequency (HF) radio wave are studied using data obtained with an ultrahigh frequency (UHF) radar at HAARP (High…”
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First 100 ms of HF modification at Tromsø, Norway by Djuth, F. T., Isham, B., Rietveld, M. T., Hagfors, T., La Hoz, C.

“…Experiments were performed with the high‐power, high‐frequency (HF) facility at Tromsø, Norway to test theoretical predictions for the excitation of ion and…”
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First simultaneous measurements of Na and K thermospheric layers along with TILs from Arecibo by Raizada, Shikha, Brum, C. M., Tepley, C. A., Lautenbach, Jens, Friedman, J. S., Mathews, John D., Djuth, F. T., Kerr, Caitlin

“…This work presents the first simultaneous observations of Na and K between 120 and 150 km altitudes along with ionospheric tidal ion layers (TILs) obtained on…”
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Using radio-induced aurora to measure the horizontal structure of ion layers in the lower thermosphere by Bernhardt, P. A., Gondarenko, N. A., Guzdar, P. N., Djuth, F. T., Tepley, C. A., Sulzer, M. P., Ossakow, S. L., Newman, D. L.

“…Two‐dimensional images of sporadic E layers have been produced using a technique called radio‐induced aurora. This technique makes the ion layer regions glow…”
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Large airglow enhancements produced via wave-plasma interactions in sporadic E by Djuth, F. T., Bernhardt, P. A., Tepley, C. A., Gardner, J. A., Kelley, M. C., Broadfoot, A. L., Kagan, L. M., Sulzer, M. P., Elder, J. H., Selcher, C., Isham, B., Brown, C., Carlson, H. C.

“…In the past there has been great interest in monitoring enhanced 557.7 nm O(¹S) emissions from the thermosphere in connection with high‐power, high‐frequency…”
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Erratum to: Temporal Development of HF-Excited Langmuir and Ion Turbulence at Arecibo by Djuth, F. T., DuBois, D. F.

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Evidence of reflection of a long-period gravity wave in observations of the nightglow over Arecibo on May 8-9, 1989 by Walterscheid, R. L., Hecht, J. H., Djuth, F. T., Tepley, C. A.

“…During the Arecibo Initiative in Dynamics of the Atmosphere (AIDA) campaign there were several unusual observations of the O2 Atmospheric (0,1) and OH Meinel…”
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High-resolution studies of atmosphere-ionosphere coupling at Arecibo Observatory, Puerto Rico by Djuth, F. T., Sulzer, M. P., Elder, J. H., Wickwar, V. B.

“…Very accurate measurements of electron density can be made at Arecibo Observatory, Puerto Rico, by applying the coded long‐pulse (CLP) radar technique [Sulzer,…”
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Measurements of artificial periodic inhomogeneities at HIPAS Observatory by Djuth, F. T., Groves, K. M., Elder, J. H., Shinn, E. R., Quinn, J. M., Villasenor, J., Wong, A. Y.

“…Results are presented from recent experiments that employ high‐power, high‐frequency (HF) radio waves to probe the mesosphere and lower thermosphere. The…”
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Lead zirconate titanate films for d33 mode cantilever actuators by Zhang, Q.Q., Gross, S.J., Tadigadapa, S., Jackson, T.N., Djuth, F.T., Trolier-McKinstry, S.

“…Piezoelectric Pb(Zr 0.52Ti 0.48)O 3 (PZT 52/48) cantilever actuators that operate in the d 33 mode were fabricated using surface micromaching techniques. The…”
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High frequency broadband PZT thick film ultrasonic transducers for medical imaging applications by Zhang, Q.Q., Djuth, F.T., Zhou, Q.F., Hu, C.H., Cha, J.H., Shung, K.K.

“…A modified sol–gel method is used to prepare PZT thick film on Pt-coated silicon substrate. A new method of vacuum filling sol–gel precursor solution is…”
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Suprathermal electrons generated by the interaction of powerful radio wave with the ionosphere by Gurevich, A. V., Carlson, H. C., Milikh, G. M., Zybin, K. P., Djuth, F. T., Groves, K.

“…We present two sets of observations of suprathermal electrons, produced by the interaction of powerful radio wave with the ionosphere, as seen using the…”
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Temperature dependence of oriented growth of Pb[Yb1/2Nb1/2]O3-PbTiO3 thin films deposited on LNO/Si substrates by ZHOU, Q. F, SHUNG, K. K, ZHANG, Q. Q, DJUTH, F. T

“…(1− x )Pb[Yb 1/2 Nb 1/2 ]O 3 − x PbTiO 3 (PYbN–PT, x =0.5)(001) oriented thin films were deposited onto LaNiO3 (LNO)/Si(001) substrates by sol–gel processing…”
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