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    • Milla, Marco (57)
    • Hysell, D. L. (13)
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    • Chau Chong Shing, Jorge Luis (10)
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Mostrando 10 de un total de 57 resultados de la colección: Artículos Científicos. (0.135 segundos)

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      Por | Kesaraju, S.; Mathews, J. D.; Milla, Marco; Vierinen, J. (Springer, 2017-12-02)
      Range-Doppler mapping of space-based targets using the JRO 50 MHz radar 
      The Jicamarca Radio Observatory (JRO) two-dimensional square array radar system operating at ~ 6-m wavelength was used to study the Moon and low Earth orbit satellites using the Range-Doppler inverse synthetic aperture radar technique also known as Delay-Doppler imaging. The radar data was collected ...
        Palabras claves:
      • Jicamarca
      • Range-Doppler
      • Motion compensation
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      Por | Hysell, D. L.; Baumgarten, Y.; Milla, Marco; Valdez, A.; Kuyeng, K. (American Geophysical Union, 2018-08-14)
      Ionospheric Specification and Space Weather Forecasting With an HF Beacon Network in the Peruvian Sector 
      A network of high‐frequency (HF) transmitters and receivers used for ionospheric specification is being installed in Peru. The HF transmitters employ multiple frequencies and binary phase coding with pseudorandom noise, and the observables provided by the receivers include group delay, Doppler shift, ...
        Palabras claves:
      • Radio
      • Beacon
      • Ionosphere
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      Por | Kil, Hyosub; Kwak, Young‐Sil; Lee, Woo Kyoung; Oh, Seung-Jun; Milla, Marco; Galkin, Ivan (American Geophysical Union, 2014-07-09)
      Broad plasma depletions detected in the bottomside of the equatorial F region: Simultaneous ROCSAT-1 and JULIA observations 
      We investigated the association of broad plasma depletions (BPDs) with plasma bubbles and ionospheric uplift in the equatorial F region using the coincident satellite and radar observations over Jicamarca in Peru. BPDs were detected by the first Republic of China satellite (ROCSAT-1) on the nights of ...
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      • Equatorial ionosphere
      • Plasma bubbles
      • Broad plasma depletions
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      Por | Urco, Juan M.; Chau Chong Shing, Jorge Luis; Milla, Marco; Vierinen, Juha P.; Weber, Tobias (Institute of Electrical and Electronics Engineers, 2018)
      Coherent MIMO to improve aperture synthesis radar imaging of field-aligned irregularities: first results at Jicamarca 
      Multiple-input multiple-output (MIMO) radar techniques make use of multiple transmitters and multiple receivers to improve the spatial characterization of targets. In the case where the Bragg scattering k → -vector can be assumed to be the same for all transmit-receive paths, MIMO methods can be seen ...
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      • Radar imaging
      • Radio transmitters
      • MIMO communication
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      Por | Milla, Marco; Kudeki, Erhan (European Geosciences Union (EGU), 2006-07)
      F-region electron density and Te / Ti measurements using incoherent scatter power data collected at ALTAIR 
      The ALTAIR UHF radar was used in an incoherent scatter experiment to observe the low-latitude ionosphere during the Equis 2 rocket campaign. The measurements provided the first high-resolution electron density maps of the low-latitude D- and E-region in the Pacific sector and also extended into the ...
        Palabras claves:
      • Incoherent Scattering Radar
      • F Region
      • Ionospheric Electron Density
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      Por | Vierinen, Juha; Tveito, Torbjørn; Gustavsson, Björn; Kesaraju, Saiveena; Milla, Marco (Elsevier, 2017-11)
      Radar images of the Moon at 6-meter wavelength 
      We present new range-Doppler images of the Moon using 6-mwavelength. The radar images were obtained using the Jicamarca Radio Observatory 49.92  MHz radar. The observations were performed using circular polarization on transmit and two orthogonal linear polarizations on receive, allowing scattering ...
        Palabras claves:
      • Moon
      • Synthetic aperture radar
      • Doppler effect
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      Por | Immel, Thomas J.; Liu, Guiping; England, Scott L.; Goncharenko, Larisa P.; Erickson, Phillip J.; Lyashenko, Mykhaylo V.; Milla, Marco; Chau Chong Shing, Jorge Luis; Frey, Harald U.; Mende, Stephen B.; Zhou, Qihou; Stromme, Anja; Paxton, Larry J. (Elsevier, 2015-11)
      The August 2011 URSI World Day campaign: Initial results 
      During a 10-day URSI World Day observational campaign beginning on August 1, 2011, an isolated, major geomagnetic storm occurred. On August 5, Kp reached values of 8− and Dst dropped to −113 nT. The occurrence of this isolated storm in the middle of a 10-day URSI World Day campaign provides and ...
        Palabras claves:
      • Ionosphere
      • Radar
      • Thermosphere
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      Por | Milla, Marco; Kudeki, Erhan (Institute of Electrical and Electronics Engineers, 2011-10-07)
      Incoherent Scatter Spectral Theories—Part II: Modeling the Spectrum for Modes Propagating Perpendicular to B 
      Incoherent scatter (IS) spectral models for collisional and magnetized F-region plasmas are developed based on a general framework described in part I of this paper and on the statistics of simulated particle trajectories. In the simulations, a Langevin update equation is used to describe the motion ...
        Palabras claves:
      • Fokker–Planck collision model
      • Incoherent scatter (IS)
      • Langevin equation
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      Por | Kudeki, Erhan; Milla, Marco (Institute of Electrical and Electronics Engineers, 2010-10-07)
      Incoherent Scatter Spectral Theories—Part I: A General Framework and Results for Small Magnetic Aspect Angles 
      A general framework for the incoherent scatter radar spectral theories is presented in terms of the generalized Nyquist theorem, Kramers-Kronig relations, and the characteristic functions of random charge-carrier displacements in the ionosphere. Specific spectral models for typical ionospheric conditions ...
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      • Incoherent scatter
      • Ionosphere
      • Radar
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      Por | Woodman Pollitt, Ronald Francisco; Farley, Donald T.; Balsley, Ben B.; Milla, Marco (Copernicus Publications, 2019-10-02)
      The early history of the Jicamarca Radio Observatory and the incoherent scatter technique 
      The purpose of these historical notes is to present the early history of the Jicamarca Radio Observatory (JRO), a research facility that has been conducting observations and studies of the equatorial ionosphere for more than 50 years. We have limited the scope of these notes to the period of the ...
        Palabras claves:
      • Jicamarca Radio Observatory
      • Ionospheric Radar
      • Incoherent scattering
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