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    • Chau Chong Shing, Jorge Luis (15)
    • Hysell, D. L. (12)
    • Milla, Marco (7)
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    • Ionospheric irregularities (39)
    • Equatorial ionosphere (24)
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Mostrando 10 de un total de 39 resultados de la comunidad: Ciencias del Geoespacio y Astronomía. (0.105 segundos)

Mostrando ítems 1-10 de 39

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      Por | Farley, D. T. (European Geosciences Union, 2009-04-02)
      The equatorial E-region and its plasma instabilities: a tutorial 
      In this short tutorial we first briefly review the basic physics of the E-region of the equatorial ionosphere, with emphasis on the strong electrojet current system that drives plasma instabilities and generates strong plasma waves that are easily detected by radars and rocket probes. We then discuss ...
        Palabras clave:
      • Ionosphere
      • Electric fields and currents
      • Equatorial ionosphere
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      Por | Hysell, D. L.; Milla, Marco; Kuyeng, K. (American Geophysical Union, 2019-11)
      Radio beacon and radar assessment and forecasting of equatorial F region ionospheric stability 
      Ionospheric conditions on two adjacent nights in March 2019 were observed at the Jicamarca Radio Observatory using a combination of incoherent scatter, coherent scatter, and high‐frequency (HF) radio modes. The HF data came from a network of beacons consisting of three transmitters and six receivers ...
        Palabras clave:
      • Ionosphere
      • Beacons
      • Ionospheric irregularities
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      Por | Hysell, D. L.; Chau Chong Shing, Jorge Luis (American Geophysical Union, 2006-01)
      Optimal aperture synthesis radar imaging 
      Aperture synthesis radar imaging has been used to investigate coherent backscatter from ionospheric plasma irregularities at Jicamarca and elsewhere for several years. Phenomena of interest include equatorial spread F, 150-km echoes, the equatorial electrojet, range-spread meteor trails, and mesospheric ...
        Palabras clave:
      • Radar imaging
      • Ionospheric irregularities
      • Inverse methods
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      Por | Chau Chong Shing, Jorge Luis; Hysell, D. L.; Kuyeng, K. M.; Galindo, F. R. (European Geosciences Union, 2008-08)
      Phase calibration approaches for radar interferometry and imaging configurations: equatorial spread F results 
      In recent years, more and more radar systems with multiple-receiver antennas are being used to study the atmospheric and ionospheric irregularities with either interferometric and/or imaging configurations. In such systems, one of the major challenges is to know the phase offsets between the different ...
        Palabras clave:
      • Ionosphere
      • Equatorial ionosphere
      • Ionospheric irregularities
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      Por | Hysell, D. L.; Milla, Marco; Condori, L.; Meriwether, J. W. (American Geophysical Union, 2014-08-11)
      Data‐driven numerical simulations of equatorial spread F in the Peruvian sector: 2. Autumnal equinox 
      An ongoing effort to simulate plasma instability in the equatorial ionosphere leading to equatorial spread F (ESF) in the American sector is described. Ionospheric state parameters including plasma number density and vector drift velocity profiles were measured at the Jicamarca Radio Observatory in ...
        Palabras clave:
      • Equatorial spread F
      • Ionospheric irregularities
      • Space weather
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      Por | Hickey, Dustin A.; Martinis, Carlos R.; Mendillo, Michael; Baumgardner, Jeffrey; Wroten, Joei; Milla, Marco (European Geosciences Union (EGU), 2018-03-22)
      Simultaneous 6300 Å airglow and radar observations of ionospheric irregularities and dynamics at the geomagnetic equator 
      In March 2014 an all-sky imager (ASI) was installed at the Jicamarca Radio Observatory (11.95°S, 76.87°W; 0.3°S MLAT). We present results of equatorial spread F (ESF) characteristics observed at Jicamarca and at low latitudes. Optical 6300 and 7774Å airglow observations from the Jicamarca ASI are ...
        Palabras clave:
      • Ionosphere
      • Equatorial ionosphere
      • Ionospheric irregularities
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      Por | Hysell, D. L. (Elsevier, 2000-10-06)
      An overview and synthesis of plasma irregularities in equatorial spread F 
      A unified picture of plasma irregularities in equatorial spread F is developed from the analysis of satellite, sounding rocket, and coherent scatter radar observations. The coherent scatter data are analyzed using a new in-beam radar imaging technique that permits direct comparison between radar data, ...
        Palabras clave:
      • Ionospheric irregularities
      • Equatorial ionosphere
      • Equatorial spread F
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      Por | Yizengaw, E.; Moldwin, M. B.; Zesta, E.; Biouele, C. M.; Damtie, B.; Mebrahtu, A.; Rabiu, B.; Valladares, C. F.; Stoneback, R. (European Geosciences Union (EGU), 2014-03-13)
      The longitudinal variability of equatorial electrojet and vertical drift velocity in the African and American sectors 
      While the formation of equatorial electrojet (EEJ) and its temporal variation is believed to be fairly well understood, the longitudinal variability at all local times is still unknown. This paper presents a case and statistical study of the longitudinal variability of dayside EEJ for all local times ...
        Palabras clave:
      • Ionosphere
      • Equatorial ionosphere
      • Ionospheric irregularities
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      Por | Chapagain, Narayan P.; Fisher, Daniel J.; Meriwether, John W.; Chau Chong Shing, Jorge Luis; Makela, Jonathan J. (American Geophysical Union, 2013-03-20)
      Comparison of zonal neutral winds with equatorial plasma bubble and plasma drift velocities 
      A one-year dataset spanning March 2011-March 2012 of coincident observations of night time thermospheric zonal neutral winds, equatorial plasma bubble (EPB) velocities, and zonal plasma drifts are used to examine the relationship between the thermosphere and ionosphere near the geomagnetic equator ...
        Palabras clave:
      • Equatorial ionosphere
      • Ionosphere/atmosphere interactions
      • Ionospheric irregularities
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      Por | Hysell, D. L.; Sharma, P.; Urco, M.; Milla, Marco (American Geophysical Union, 2019-06)
      Aperture-synthesis radar imaging with compressive sensing for ionospheric research 
      Inverse methods involving compressive sensing are tested in the application of two-dimensional aperture-synthesis imaging of radar backscatter from field-aligned plasma density irregularities in the ionosphere. We consider basis pursuit denoising, implemented with the fast iterative shrinkage thresholding ...
        Palabras clave:
      • Ionospheric irregularities
      • Imaging
      • Compressive sensing
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