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Spatial evolution of 26-day recurrent galactic cosmic ray decreases: Correlated Ulysses COSPIN/KET and SOHO COSTEP observations

Description: In December 1995 the Ulysses spacecraft was at a radial distance of 3 AU from the Sun and 60{degree} northern heliographic latitude. To that time the Solar and Heliospheric Observatory (SOHO) started its mission. On board of both spacecraft particle sensors are measuring electrons, protons and helium nuclei in the MeV to GeV energy range. In early 1996 the counting rates of several hundred MeV galactic cosmic rays at Ulysses and at SOHO (Earth orbit) were modulated by recurrent cosmic ray decre… more
Date: December 31, 1998
Creator: Heber, B.; Bothmer, V. & Droege, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Magnetic energy storage and the nightside magnetosphere-ionosphere coupling

Description: The change m in the magnetic energy stored m in the Earth`s magnetotail as a function of the solar wind, BIF conditions are investigated using an empirical magnetic field model. The results are used to calculate the two normal modes contained m in the low-dimensional global model called WINDMI for the solar wind driven magnetosphere-ionosphere system. The coupling of the magnetosphere-ionosphere (MI) through the nightside region 1 current loop transfers power to the ionosphere through two modes… more
Date: May 1, 1998
Creator: Horton, W.; Pekker, M. & Doxas, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Shear flow induced wave couplings in the solar wind

Description: A sheared background flow in a plasma induces coupling between different MHD wave modes, resulting in their mutual transformations with corresponding energy redistributing between the modes. In this way, the energy can be transfered from one wave mode to the other, but energy can also be added to or extracted from the background flow. In the present paper it is investigated whether the wave coupling and energy transfer mechanisms can operate under solar wind conditions. It is shown that this is… more
Date: January 1, 1998
Creator: Poedts, Stefaan; Rogava, Andria D. & Mahajan, Swadesh M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis and visualization of global magnetospheric processes

Description: This is the final report of a three-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). The purpose of this project is to develop new computational and visualization tools to analyze particle dynamics in the Earth`s magnetosphere. These tools allow the construction of a global picture of particle fluxes, which requires only a small number of in situ spacecraft measurements as input parameters. The methods developed in this project have led… more
Date: December 31, 1998
Creator: Winske, D.; Mozer, F.S. & Roth, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Influence of solar-probe inherent atmosphere on in-situ observations

Description: The solar corona is the source of the solar wind, which is responsible for the heliosphere and plays a crucial role in solar/terrestrial phenomena. A comprehensive understanding of these phenomena can be established only by directly measuring ion and electron velocity distributions, plasma waves, and fluxes of energetic particles near the sun. The problem resulting from the inherent atmosphere of a spacecraft moving in the vicinity of the sun and the influence of this atmosphere on in-situ meas… more
Date: August 1, 1998
Creator: Hassanein, A.; Konkashbaev, A. I.; Konkashbaev, I. K. & Nikandrov, L. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Plasma Signatures of Radial Field Power Dropouts

Description: A class of small scale structures, with a near-radial magnetic field and a drop in magnetic field fluctuation power, have recently been identified in the polar solar wind. An earlier study of 24 events, each lasting for 6 hours or more, identified no clear plasma signature. In an extension of that work, radial intervals lasting for 4 hours or more (89 in total), have been used to search for a statistically significant plasma signature. It was found that, despite considerable variations between … more
Date: October 4, 1998
Creator: Lucek, E.A.; Horbury, T.S.; Balogh, A. & McComas, D.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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