Ciencias del Geoespacio y Astronomía
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Browsing Ciencias del Geoespacio y Astronomía by Subject "Aeronomy"
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Item Open Access AMISR contributions to equatorial aeronomy(Instituto Geofísico del Perú, 2004) Hysell, D. L.; Chau Chong Shing, Jorge LuisPresentación incluida en CEDAR (Coupling, Energetics and Dynamics of Atmospheric Regions) Workshop for 2004 (Santa Fe, Nuevo México, 2004).Item Open Access Donald T. Farley, appleton prize 1996: his contributions to equatorial aeronomy(Instituto Geofísico del Perú, Radio Observatorio de Jicamarca, 2000-05) Woodman Pollitt, Ronald FranciscoTexto homenaje a Donald T. Farley, ganador del Premio Appleton en el campo de la física ionosférica, entregado por la Council of the Royal Society por las recomendaciones del Board of officers de URSI.Item Open Access Equatorial zonal electric fields during the 2002-2003 sudden stratospheric warming event(Instituto Geofísico del Perú, 2009) Olson, Michael E.; Fejer, B. G.; Stolle, C.; Chau Chong Shing, Jorge Luis; Goncharenko, L. P.For nearly fifty years, the Jicamarca Radio Observatory (11.95°S, 76.87°W, 2°N dip latitude) near Lima, Peru, has measured ionospheric plasma drifts. Over the last ten years, measurements of plasma drift velocities have also been measured using radar observations of the equatorial 150 km altitude región (Kudeki and Fawcett, 1993; Chau and Woodman, 2004).Item Open Access Inverse methods in aeronomy(Instituto Geofísico del Perú, 2008) Hysell, D. L.Diapositivas presentadas en 2008 Annual Summer CEDAR Workshop, 16-21 June 2008. Midway, Utah, USA.Item Restricted Jicamarca antenna arrays: systems and science(Instituto Geofísico del Perú, 2005) Woodman Pollitt, Ronald FranciscoPonencia preparada para la: Swedish Institute of Space Physics (Institutet för Rymdfysik, IRF).Item Restricted Jicamarca incoherent and coherent scatter radar capabilities for equatorial aeronomy(European Geosciences Union, 2005) Chau Chong Shing, Jorge Luis; Hysell, D.L."The International Symposium on Equatorial Aeronomy is held approximately every three to four years and is typically a major gathering of scientists from around the world interested in the low-latitude atmosphere and ionosphere, as well as coupling with other latitudinal and altitudinal regions. Each ISEA represents an opportunity for researchers to share their most recent results as well as discuss possibilities for future campaigns and experiments. Over 130 scientists attended ISEA-11 from 15 countries, participating in eight different scientific sessions. The sessions were: (1) K. C. Yeh memorial session: F-region irregularities and scintillations, radio occultation and tomographic imaging; (2) Upper atmospheric responses to seismic and volcanic activities; (3) Equatorial and low-latitude studies: ionospheric and thermospheric dynamics; (4) Numerical simulation, modeling and data assimilation; (5) Magnetic storm effects and space weather features at low latitudes; (6) E-region plasma irregularities and instabilities; (7) Equatorial and low-latitude studies: middle atmosphere dynamics and coupling processes; (8) Experimental techniques and recent low-latitude campaigns."Item Open Access SIMONe Peru: deployment and operations(Instituto Geofísico del Perú, 2020-06) Suclupe, J.; Kuyeng, K.; Milla, Marco; Chau, J.L.; Urco, M.; Pfeffer, N.; Clahsen, M.; Vierinen, J.; Erickson, P.SIMONe Peru is a modern multistatic specular meteor radar which allows measuring winds in the mesosphere and lower thermosphere (MLT) between 70 and 110 km in altitude. Its main objective is to study the atmospheric dynamic in this region. Moreover, the system provides a higher number of detections compared to other systems and gives good statistics from detections in this region. This system started operations on september 2019 in the central coast of Peru. This work presents a general outline of the SIMONe Peru system, as well as the some preliminary results that allow us to operate and monitor it.Item Restricted The August 2011 URSI World Day campaign: Initial results(Elsevier, 2015-11) 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.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 unprecedented opportunity to observe the coupling of solar wind energy into the magnetosphere and to evaluate the varied effects that occur in the coupled magnetosphere–ionosphere–thermosphere system. Dramatic changes in the ionosphere are seen at every one of the active radar stations, extending from Greenland down to equatorial Peru in the American sector and at middle latitudes in Ukraine. Data from TIMED and THEMIS are shown to support initial interpretations of the observations, where we focus on processes in the middle latitude afternoon sector during main phase, and the formation of a dense equatorial ionosphere during storm recovery. The combined measurements strongly suggest that the changes in ionospheric conditions observed after the main storm phase can be attributed in large part to changes in the stormtime thermosphere. This is through the generation of disturbance dynamo winds and also global neutral composition changes that either reduce or enhance plasma densities in a manner that depends mainly upon latitude. Unlike larger storms with possibly more sustained forcing, this storm exhibits minimal effects of persistent meridional stormtime wind drag, and little penetration of solar wind electric potentials to low latitudes. It is, therefore, an outstanding example of an impulsive event that exhibits longer-term effects through modification of the background atmosphere.Item Open Access The ST radar under construction at Piura, Peru (6°S, 81°W)(Instituto Geofísico del Perú, 1989) Balsley, B.B.; Ecklund, W.L.; Carter, D.A.; Gage, K.S.; Mugica, R.; Mabres, A.; Rodriguez, R.; Avery, S.K.; Violette, J.; Woodman Pollitt, Ronald FranciscoThe Piura ST radar currently under construction at the Universite de Piura in Piura, Peru will be a 50 MHz VHF system. This radar will form the easternmost facility in the proposed trans-Pacific network of ST radars that will eventually span the equatorial Pacific. Support for the construction of the Piura radar is being furnished by the U.S. National Science Foundation. The ST radar at Piura is part of a cooperative research program involving NOAA's Aeronomy Laboratory and the University of Colorado in the United States and the Universite de Piura and the Instituto Geofísica del Peru in Peru. The radar is being constructed on the campus of the Universite de Piura. A container filled with antenna cables and radar hardware was shipped from Alaska during the past few months. Site preparations are now underway and the antenna construction will begin about the first of the year. A building will be constructed next to the antenna site to house the radar equipment. A diesel generator has been purchased to provide a continuous source of power to the radar. The first phase of construction will be completed by mid-1989 and the radar will be operated for the first year in a vertical-only mode. During 1990 the radar will be modified so that horizontal as well as vertical velocities can be measured.