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  • Journal article
    Lilensten J, Galand M, 1998,

    Proton-electron precipitation effects on the electron production and density above EISCAT (Tromsø) and ESR

    , Annales Geophysicae, Vol: 16, Pages: 1299-1307, ISSN: 0992-7689

    The suprathermal particles, electrons and protons, coming from the Sun and precipitating into the high-latitude atmosphere are an energy source for the Earth's ionosphere. They interact with the ambient thermal gas through inelastic and elastic collisions. Most of the physical quantities perturbed by the precipitation, such as the electron production rate, may be evaluated by solving the stationary Boltzmann transport equation, which yields the particle fluxes as a function of altitude, energy, and pitch angle. This equation has been solved for the three different suprathermal species (electrons, protons and hydrogen atoms). We first compare the results of our theoretical code to a coordinated DMSP/EISCAT experiment, and to another approach. Then, we show the effects that pure proton precipitation may have on the ionosphere, through primary and secondary ionization. Finally, we compare the effects of proton precipitation and electron precipitation in some selected cases above EISCAT (Tromsø) and ESR.
  • Journal article
    McComas DJ, Bame SJ, Barraclough BL, Feldman WC, Funsten HO, Gosling JT, Riley P, Skoug R, Balogh A, Forsyth R, Goldstein BE, Neugebauer Met al., 1998,

    Ulysses' return to the slow solar wind

    , GEOPHYSICAL RESEARCH LETTERS, Vol: 25, Pages: 1-4, ISSN: 0094-8276
  • Journal article
    Bale SD, Kellogg PJ, Goetz K, Monson SJet al., 1998,

    Transverse z-mode waves in the terrestrial electron foreshock

    , GEOPHYSICAL RESEARCH LETTERS, Vol: 25, Pages: 9-12, ISSN: 0094-8276
  • Conference paper
    Balogh A, 1998,

    Magnetic fields in the inner heliosphere

    , Publisher: SPRINGER, Pages: 93-104, ISSN: 0038-6308
  • Conference paper
    Simnett GM, Kunow H, Fluckiger E, Heber B, Horbury T, Kota J, Lazarus A, Roelof EC, Simpson JA, Zhang M, Decker RBet al., 1998,

    Corotating particle events - Report of working group 2

    , Publisher: SPRINGER, Pages: 215-258, ISSN: 0038-6308
  • Conference paper
    Fisk LA, Wenzel KP, Balogh A, Burger RA, Cummings AC, Evenson P, Heber B, Jokipii JR, Krainev MB, Kota J, Kunow H, Le Roux JA, McDonald FB, McKibben RB, Potgieter MS, Simpson JA, Steenberg CD, Suess S, Webber WR, Wibberenz G, Zhang M, Ferrando P, Fujii Z, Lockwood JA, Moraal H, Stone ECet al., 1998,

    Global processes that determine cosmic ray modulation - Report of Working Group 1

    , Publisher: SPRINGER, Pages: 179-214, ISSN: 0038-6308
  • Journal article
    Schwartz SJ, Daly PW, Fazakerley AN, 1998,

    Multi-Spacecraft Analysis of Plasma Kinetics

    , ISSI Scientific Reports Series, Vol: 1, Pages: 159-184-159-184
  • Journal article
    Paschmann G, Fazakerley AN, Schwartz SJ, 1998,

    Moments of Plasma Velocity Distributions

    , ISSI Scientific Reports Series, Vol: 1, Pages: 125-158-125-158
  • Journal article
    Fazakerley AN, Schwartz SJ, Paschmann G, 1998,

    Measurement of Plasma Velocity Distributions

    , ISSI Scientific Reports Series, Vol: 1, Pages: 91-124-91-124
  • Journal article
    Harvey CC, Schwartz SJ, 1998,

    Time Series Resampling Methods

    , ISSI Scientific Reports Series, Vol: 1, Pages: 43-64-43-64
  • Conference paper
    Muller-Wodarg I, Aylward AD, 1998,

    The influence of tides on composition of the thermosphere

    , CO 1 and C4 1 Symposia of COSPAR Scientific Commission C - Atmospheric Tidal Dynamics and E-Region and D-Region Physics, at the 31st COSPAR Scientific Assembly, Publisher: PERGAMON PRESS LTD, Pages: 807-810, ISSN: 0273-1177
  • Conference paper
    Bale SD, Kellogg PJ, Erickson KN, Monson SJ, Amoldy RLet al., 1998,

    Ponderomotive lower hybrid wave growth in electric fields associated with electron beam injection and transverse ion acceleration

    , 31st COSPAR Scientific Assembly on Active Experiments in Space Plasmas, Publisher: PERGAMON PRESS LTD, Pages: 735-738, ISSN: 0273-1177
  • Journal article
    Dougherty MK, Dunlop MW, Prange R, Rego Det al., 1998,

    Identification of a current-driven aurora on Jupiter via correlated Ulysses and HST observations

    , Planetary and Space Science, Vol: 46, Pages: 531-540
  • Conference paper
    Canas A, Murray J, Harries J, 1998,

    Tropospheric airborne Fourier transform spectrometer (TAFTS)

    , Conference on Satellite Remote Sensing of Clouds and the Atmosphere II, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, Pages: 91-102, ISSN: 0277-786X
  • Journal article
    Naud C, Russell JE, Harries JE, 1998,

    High Spectral resolution simulation of the impact on heating rates of cirrus clouds in the Far Infrared

    , Satellite Remote Sensing of Clouds and the Atmosphere Iii, Vol: 3495, Pages: 92-99, ISSN: 0277-786X
  • Journal article
    Schwartz SJ, 1998,

    Shock and Discontinuity Normals, Mach Numbers, and Related Parameters

    , ISSI Scientific Reports Series, Vol: 1, Pages: 249-270-249-270
  • Conference paper
    Desai MI, Bothmer V, Marsden RG, Sanderson TR, Balogh A, Forsyth RJ, Goldstein BEet al., 1998,

    Acceleration in energetics ions (∼1 MeV) in corotating interaction regions

    , D0 3 Symposium of COSPAR Scientific-Commission-D on Particle Acceleration in Space Plasmas at the 31st COSPAR Scientific Assembly, Publisher: PERGAMON PRESS LTD, Pages: 555-558, ISSN: 0273-1177
  • Conference paper
    Russell JE, Bantges RJ, Haigh JD, Smith WL, Revercomb HEet al., 1998,

    Retrieval of cirrus properties from high spectral resolution IR measurements

    , Conference on Satellite Remote Sensing of Clouds and the Atmosphere II, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, Pages: 60-71, ISSN: 0277-786X
  • Conference paper
    Russell JE, Bantges RJ, Naud C, Haigh JDet al., 1998,

    The effect of cirrus cloud in the infrared (4-100 microns) - high spectral resolution simulations

    , Conference on Satellite Remote Sensing of Clouds and the Atmosphere III, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, Pages: 100-108, ISSN: 0277-786X
  • Conference paper
    Balogh A, Forsyth RJ, 1998,

    The results of the Ulysses mission: A survey of the heliosphere in three dimensions

    , Paris, conference on a crossroads for european solar and heliospheric physics MAR 23-27, 1998 CANARY ISLANDS, SPAIN, Publisher: European Space Agency, Pages: 45-54
  • Conference paper
    Mossavati R, Kellock S, Mueller J, Harries JE, Murray JE, Sawyer E, Caldwell M, Oliver M, Delderfield J, Sandford Met al., 1998,

    Geostationary earth radiation budget

    , Conference on Satellite Remote Sensing of Clouds and the Atmosphere II, Publisher: SPIE-INT SOC OPTICAL ENGINEERING, Pages: 125-135, ISSN: 0277-786X
  • Journal article
    Naud C, Russell JE, Harries JE, 1998,

    High Spectral resolution simulation of the impact on heating rates of cirrus clouds in the Far Infrared

    , Satellite Remote Sensing of Clouds and the Atmosphere Iii, Vol: 3495, Pages: 92-99, ISSN: 0277-786X
  • Journal article
    Ogilvie KW, Roelof EC, Forsyth RJ, 1997,

    Interface structure of co-rotating interaction regions

    , European Space Agency, (Special Publication) ESA SP, Pages: 59-65, ISSN: 0379-6566

    Plasma and particle observations on Ulysses during its passes through the southern and northern heliosphere have revealed that, inside the streamer belt, the large-scale structure of the quiet global heliosphere is dominated by corotating interaction regions (CIRs). Therefore, considerable attention is now being given to the internal plasma structure of CIRs, and in particular, to the mainfestations of the stream interfaces that should mark their origins as interactions between low speed solar wind (in the low-latitude streamer belt) and high speed solar wind (from the equatorial extensions of the high latitude polar coronal holes). The SWICS and HI-SCALE experiments on Ulysses combine plasma and energetic particle measurements that are of considerable utility for such studies because, between them, they cover the proton energy range from 10 eV to 5 MeV. We use these measurements, together with magnetic field data, to study the remarkable series of CIRs that occurred during the period beginning July 1992 and the end of 1993 as Ulysses rose from the ecliptic to a southern heliographic latitude of 48 degrees. We make use of the identification of interfaces recently published by Wimmer-Schweingruber et al., 1997. The structure of the regions between the forward and reverse shocks has previously been analyzed in terms of the proton specific entropy argument log (n/T3/2) that should exhibit a discontinuous jump at the stream interface. It has been claimed that the stream interface, defined with respect to specific entropy, is also associated with a discontinuity in energetic proton intensities. This paper examines the energetic particle data (> 60 keV) and how they were ordered with respect to interfaces and with respect to the magnetic field.
  • Journal article
    Heber B, Bothmer V, Dröge W, Kunow H, Müller-Mellin R, Posner A, Ferrando P, Raviart A, Paizis C, McComas D, Forsyth RJ, Szabo A, Lazarus AJet al., 1997,

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

    , European Space Agency, (Special Publication) ESA SP, Pages: 331-336, ISSN: 0379-6566

    In December 1995 the Ulysses spacecraft was at a radial distance of 3 AU from the Sun and 60° 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 decreases (RCRDs). The RCRDs at SOHO were found to be associated with a corotating interaction region (CIRs). A Lomb (spectral) analysis was performed on the galactic cosmic ray flux from February 1996 to June 1996. Surprisingly, the most probable frequency is ∼28 days and not 26 or 27 days, corresponding to one solar rotation. The amplitude of the RCRDs is ∼2.3% on both spacecraft. The variation in the solar wind speed shows the same periodicities and is anticorrelated to the variation in the cosmic ray flux (see Richardson et al. 1996). In contrast to the RCRDs the amplitude found in the solar wind speed is four times larger at WIND (120 km/s) than at Ulysses (32 km/s). The solar wind proton density and magnetic field strength yielded no significant periodicities, neither at Ulysses nor at WIND. Comparing the RCRDs with coronal hole structures observed in the FE XIV line, we found that a single coronal hole close to the heliographic equator can account for the RCRDs observed "simultaneously" at Ulysses and SOHO. The coronal hole boundaries changed towards lower Carrington longitudes and vanished slowly. The changes of the boundaries during the investigated period could explain a 28 day periodicity.
  • Journal article
    Southwood DJ, Kivelson MG, 1997,

    Frequency doubling in ultralow frequency wave signals

    , JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, Vol: 102, Pages: 27151-27158
  • Journal article
    Forsyth RJ, Balogh A, Smith EJ, Gosling JTet al., 1997,

    Ulysses observations of the northward extension of the heliospheric current sheet

    , GEOPHYSICAL RESEARCH LETTERS, Vol: 24, Pages: 3101-3104, ISSN: 0094-8276
  • Journal article
    Muller-Wodarg ICF, 1997,

    Modelling perturbations propagating through the mesopause into the earth's upper atmosphere

    , OBSERVATORY, Vol: 117, Pages: 388-388, ISSN: 0029-7704
  • Journal article
    Woch J, Axford WI, Mall U, Wilken B, Livi S, Geiss J, Gloeckler G, Forsyth RJet al., 1997,

    SWICS/Ulysses observations: The three-dimensional structure of the heliosphere in the declining/minimum phase of the solar cycle

    , GEOPHYSICAL RESEARCH LETTERS, Vol: 24, Pages: 2885-2888, ISSN: 0094-8276
  • Journal article
    Seidel R, Keppler E, Krupp N, Woch J, Hawkins SE, Lanzerotti LJ, Dougherty MKet al., 1997,

    Energetic electron beams in the duskside Jovian magnetosphere: Ulysses EPAC and HI-SCALE measurements

    , PLANETARY AND SPACE SCIENCE, Vol: 45, Pages: 1473-+, ISSN: 0032-0633
  • Journal article
    Cargill PJ, Spicer DS, Zalesak ST, 1997,

    Magnetohydrodynamic simulations of Alfvenic pulse propagation in solar magnetic flux tubes: Two-dimensional slab geometries

    , ASTROPHYSICAL JOURNAL, Vol: 488, Pages: 854-866, ISSN: 0004-637X

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