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  • 1
    Electronic Resource
    Electronic Resource
    Auroral Frequency Lines (1959)
    [s.l.] : Nature Publishing Group
    Nature 184 (1959), S. 263-263 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The difficulties seem, however, to be least if only the frequency-lines over a limited part of the Earth are to be determined, if the observational material is restricted to a fairly small period in time, and especially if the net of observations is dense and all the observers are using the same ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/184263a0
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A Morning Discontinuity in the Orientation of Quiet Auroral Arcs (1961)
    [s.l.] : Nature Publishing Group
    Nature 192 (1961), S. 956-957 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] With the assumption of a constant height along the lower limit of the luminosity for which there is good evidence (cf. Stormer1) the angle between a straight line connecting the points at which the arc intersects the horizon and a line through the midpoint of the chord, parallel to the meridian ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/192956a0
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  • 3
    Electronic Resource
    Electronic Resource
    The Kiruna Geophysical Observatory, Sweden (1957)
    [s.l.] : Nature Publishing Group
    Nature 180 (1957), S. 828-830 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] AT a ceremony on July 2 marking the formal opening of the new Kiruna Geophysical Observatory in northern Sweden, the Royal Swedish Academy of Science accepted from the contractors the new central observatory building and the ionospheric laboratory. Representing a decade of planning and work, this ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/180828a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    A Day-time Maximum of Oblique Auroral Reflexions observed in the Auroral Zone (1960)
    [s.l.] : Nature Publishing Group
    Nature 185 (1960), S. 519-519 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] From four months records (March-June 1959) of aurorally propagated very high-frequency signals taken in the auroral zone at Kiruna Geophysical Observatory (geographic co-ordinates 67-8 N., 20-4 E., geomagnetic co-ordinates 65-3 N., 115-5 E.) and transmitted by the Finnish broadcasting station ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/185519a0
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  • 5
    Electronic Resource
    Electronic Resource
    The aurora (1975)
    Springer
    Space science reviews 17 (1975), S. 787-821 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00777256
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  • 6
    Electronic Resource
    Electronic Resource
    J. Moen, A. England and M. Lockwood (eds.), Polar Cap Boundary Phenomena (1999)
    Springer
    Space science reviews 89 (1999), S. 691-691 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This volume contains the proceedings of the NATO Advanced Study Institute on Polar Cap Boundary Phenomena held at Longyearbyen, Svalbard, Norway on June 4–13, 1997, which was the third NATO Workshop on magnetospheric boundary phenomena observable at high latitudes. Svalbard has a uniquely interesting location from observational point of view in that the dayside aurora can be observed there in the noon local time sector during the midwinter. The Norwegian groups working at Svalbard were the organisers of this third workshop as well as of the two earlier ones, but only this third one was held at Svalbard. It was attended by 86 space physicists from all over the world. The book contains 36 papers, of which the majority were presented as invited papers at the workshop, a few were contributed papers and the last paper in the volume gives a summary of the content of the workshop. As emphasized in both the Foreword and the Summary chapter of the book, the research field of the polar cap and its boundaries to other magnetospheric regions at high latitudes is one that has seen a fast development in the last ten years. This is to a great deal due to the research work done at Svalbard in combination with satellite measurements and theory development. The review in these proceedings provide also the non-specialist reader with good summaries of where different research questions stand at present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005276319026
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  • 7
    Electronic Resource
    Electronic Resource
    Observations of Intense Ionization of Long Duration below 50 km. Altitude after some Strong Solar Flares (1959)
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 1179-1180 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The total non-deviative ionospheric absorption of 27-6 Mc./s. radio waves is being measured at the Observatory on a routine basis by means of a so-called 'riometer' (relative ionospheric opacity meter) designed by C. G. Little3 at the Geophysical Institute, College, Alaska. The riometer is a ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1831179a0
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  • 8
    Electronic Resource
    Electronic Resource
    Auroral Isochasms (1959)
    [s.l.] : Nature Publishing Group
    Nature 183 (1959), S. 1478-1479 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Such projections have been calculated by Hult-qvist2, taking into account up to the fifth term of the spherical harmonic development for epoch 1945. Four such projections on the northern hemisphere are drawn as solid curves in Fig. 1. The projections are ovals with the longest diameter ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1831478a0
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  • 9
    Electronic Resource
    Electronic Resource
    Parallel electric fields accelerating ions and electrons in the same direction (1988)
    Springer
    Astrophysics and space science 144 (1988), S. 149-154 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this contribution we present Viking observations of electrons and positive ions which move upward along the magnetic field lines with energies of the same order of magnitude. We propose that both ions and electrons are accelerated by an electric field which has low-frequency temporal variations such that the ions experience an average electrostatic potential drop along the magnetic field lines whereas the upward streaming electrons are accelerated in periods of downward pointing electric field which is quasi-static for the electrons and forces them to beam out of the field region before the field changes direction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00793178
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  • 10
    Electronic Resource
    Electronic Resource
    Book reviews (1979)
    Springer
    Space science reviews 23 (1979), S. 683-689 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00212359
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