Search Results - "Valladares, C."

Magnetic Storm Effects on the Occurrence and Characteristics of Plasma Bubbles by Adhya, P., Valladares, C. E.

“…The Communications/Navigation Outages Forecast System satellite mission was designed to investigate the ionospheric conditions that lead to the formation of…”
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Statistics of total electron content depletions observed over the South American continent for the year 2008 by Seemala, G. K., Valladares, C. E.

“…This paper presents for the first time regional plots of total electron content (TEC) depletions derived from GPS observations over the South American…”
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Investigation of Large Scale Traveling Atmospheric/Ionospheric Disturbances Using the Coupled SAMI3 and GITM Models by Bukowski, A., Ridley, A., Huba, J. D., Valladares, C., Anderson, P. C.

“…We present simulation results of the vertical structure of Large Scale Traveling Ionospheric Disturbances (LSTIDs) during synthetic geomagnetic storms. These…”
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Impact of sudden stratospheric warmings on equatorial ionization anomaly by Goncharenko, L. P., Coster, A. J., Chau, J. L., Valladares, C. E.

“…We investigate the ionospheric response to several stratospheric sudden warming events which occurred in Northern Hemisphere winters of 2008 and 2009 during…”
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Global equatorial plasma bubble occurrence during the 2015 St. Patrick's Day storm by Carter, B. A., Yizengaw, E., Pradipta, R., Retterer, J. M., Groves, K., Valladares, C., Caton, R., Bridgwood, C., Norman, R., Zhang, K.

“…An analysis of the occurrence of equatorial plasma bubbles (EPBs) around the world during the 2015 St. Patrick's Day geomagnetic storm is presented. A network…”
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Statistical Analysis of TEC Distributions Observed Over South and Central America by Villalobos, J., Valladares, C. E.

“…Total electron content (TEC) values measured with several arrays of dual‐frequency GPS receivers operating continuously and simultaneously at equatorial and…”
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The longitudinal variability of equatorial electrojet and vertical drift velocity in the African and American sectors by Yizengaw, E, Moldwin, M B, Zesta, E, Biouele, C M, Damtie, B, Mebrahtu, A, Rabiu, B, Valladares, C F, Stoneback, R

“…While the formation of equatorial electrojet (EEJ) and its temporal variation is believed to be fairly well understood, the longitudinal variability at all…”
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Observations of conjugate MSTIDs using networks of GPS receivers in the American sector by Valladares, C. E., Sheehan, R.

“…This study has used total electron content (TEC) values from an extended network of GPS receivers and a highly developed processing to characterize the…”
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The Low-Latitude Ionosphere Sensor Network: Initial results by Valladares, C. E., Chau, J. L.

“…The Low‐Latitude Ionospheric Sensor Network (LISN) is a distributed observatory designed to nowcast the state and dynamics of the low‐latitude ionosphere and…”
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Observation of Scintillation Enhancements and Large‐Scale Structures Within the Equatorial Ionization Anomaly During a Sudden Stratospheric Warming Event by Valladares, C. E., Chen, Y.‐J., Hairston, M., Chau, J. L., Dhanya, R.

“…Total electron content (TEC) and L‐band scintillations measured by several networks of GPS and GNSS receivers that operate in South and Central America and the…”
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Early Morning Equatorial Ionization Anomaly From GOLD Observations by Laskar, F. I., Eastes, R. W., Martinis, C. R., Daniell, R. E., Pedatella, N. M., Burns, A. G., McClintock, W., Goncharenko, L. P., Coster, A., Milla, M. A., Wang, W., Valladares, C. E., Codrescu, M. V.

“…During geomagnetically quiet and solar minimum conditions, spatial variations of the early morning thermosphere‐ionosphere (TI) system are expected to be…”
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Longitudinal variability of equatorial plasma bubbles observed by DMSP and ROCSAT-1 by Burke, W. J., Gentile, L. C., Huang, C. Y., Valladares, C. E., Su, S. Y.

“…We compare observations of equatorial plasma bubbles (EPBs) by polar‐orbiting satellites of the Defense Meteorological Satellite Program (DMSP) with plasma…”
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Equatorial plasma bubbles and L-band scintillations in Africa during solar minimum by PAZNUKHOV, V. V, CARRANO, C. S, DAMTIE, B, D'UJANGA MUTONYI, F, NDEDA, J. O. H, BAKI, P, OBROU, O. K, OKERE, B, TSIDULL, G. M, DOHERTY, P. H, GROVES, K. M, CATON, R. G, VALLADARES, C. E, SEEMALA, G. K, BRIDGWOOD, C. T, ADENIYI, J, AMAESHI, L. L. N

“…We report on the longitudinal, local time and seasonal occurrence of equatorial plasma bubbles (EPBs) and L band (GPS) scintillations over equatorial Africa…”
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The magnetic storms of 3–4 August 2010 and 5–6 August 2011: 1. Ground‐ and space‐based observations by Valladares, C. E., Eccles, J. V., Basu, Su, Schunk, R. W., Sheehan, R., Pradipta, R., Ruohoniemi, J. M.

“…We have used total electron content (TEC) values from low, middle, and high latitudes recorded over the American continent and density and ion temperature…”
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Impacts of ionospheric scintillations on GPS receivers intended for equatorial aviation applications by Akala, A. O., Doherty, P. H., Carrano, C. S., Valladares, C. E., Groves, K. M.

“…This study examines the impacts of ionospheric scintillations on GPS receivers that are intended for equatorial or transequatorial aviation applications. We…”
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Comparison of equatorial GPS-TEC observations over an African station and an American station during the minimum and ascending phases of solar cycle 24 by Akala, A. O., Seemala, G. K., Doherty, P. H., Valladares, C. E., Carrano, C. S., Espinoza, J., Oluyo, S.

“…GPS-TEC data were observed at the same local time at two equatorial stations on both longitudes: Lagos (6.52° N, 3.4° E, 3.04° S magnetic latitude), Nigeria;…”
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Polar cap patches observed during the magnetic storm of November 2003: observations and modeling by Valladares, C. E., Pedersen, T., Sheehan, R.

“…We present multi-instrumented measurements and multi-technique analysis of polar cap patches observed early during the recovery phase of the major magnetic…”
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GPS observation of continent-size traveling TEC pulsations at the start of geomagnetic storms by Pradipta, R., Valladares, C. E., Doherty, P. H.

“…We report our experimental observation of continent‐size traveling plasma disturbances using GPS measurements of total electron content (TEC) over the North…”
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Longitudinal differences of ionospheric vertical density distribution and equatorial electrodynamics by Yizengaw, E., Zesta, E., Moldwin, M. B., Damtie, B., Mebrahtu, A., Valladares, C. E., Pfaff, R. F.

“…Accurate estimation of global vertical distribution of ionospheric and plasmaspheric density as a function of local time, season, and magnetic activity is…”
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Optimization of fructose-rich syrups production from Opuntia ficus-indica inulin using immobilized inulinase on Luffa cylindrical by Lara-Fiallos, Marco V., Montalvo-Villacreses, Dayana T., Espín-Valladares, Rosario C., Nuñez-Pérez, Jimmy, Pérez-Martínez, Amaury, González-Suárez, Erenio, Pais-Chanfrau, José M.

“…[Display omitted] Luffa cylindrica has numerous domestic and industrial uses. For example, this natural fiber supports immobilization through the covalent…”
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