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  • 1
    Publication Date: 2016-06-07
    Description: An overview of the design of the ORION mobile system is presented. System capability and performance characteristics are outlined. Functional requirements and key performance parameters are stated for each of the nine subsystems. A master design and implementation schedule is given.
    Keywords: GEOPHYSICS
    Type: The Telecommun. and Data Acquisition; p 6-32
    Format: application/pdf
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  • 2
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    In:  Other Sources
    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 186-187
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  • 3
    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmopshere Res. Program; p 203-204
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  • 4
    Publication Date: 2011-08-19
    Keywords: GEOPHYSICS
    Type: NASA, Washington Upper Atmosphere Res. Program; p 199-200
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  • 5
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    Publication Date: 2011-08-17
    Description: Recent plasma wave observations made by the ISEE and GEOS satellites of the electrostatic cyclotron harmonic waves have been consistent with and organized very well within the theoretical framework of Bernstein waves excited in magnetospheric plasma. Attention is given to an examination of a number of effects that result simply from the convective properties of Bernstein waves in a magnetospheric plasma environment. The roles of wave trapping in plasma density depressions and partial trappings near the magnetic equator are discussed. Certain future wave observations are suggested that can improve the understanding of this magnetospheric wave phenomenon.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 85; May 1
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  • 6
    Publication Date: 2011-08-17
    Description: The paper examines the time-dependent models of the aurora which show that various ionospheric parameters respond to the onset of auroral ionization with different time histories. A pass of the Atmosphere Explorer C satellite over Poker Flat, Alaska, and ground based photometric and photographic observations have been used to resolve the time-space ambiguity of a specific auroral event. The density of the O(+), NO(+), O2(+), and N2(+) ions, the electron density, and the electron temperature observed at 280 km altitude in a 50 km wide segment of an auroral arc are predicted by the model if particle precipitation into the region commenced about 11 min prior to the overpass.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 85; Mar. 1
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  • 7
    Publication Date: 2011-08-17
    Description: The effects of vertical E x B transport on NO(+), O2(+) and O(+) densities in the nighttime equatorial ionospheric F 1 region are investigated. Ion densities are calculated as functions of altitude, latitude and local time by the numerical solution of coupled, time-dependent ion continuity equations, taking into account production, loss by charge exchange and dissociative recombination and transport by diffusion and E x B drift. The results of the calculations are compared with measurements of NO(+), O2(+) and O(+) ion densities obtained at low altitudes by a mass spectrometer on board the Atmospheric Explorer C satellite, and are found to be consistent with the observations, suggesting that in the equatorial region, vertical transport by E x B drift is primarily responsible for producing the observed NO(+), O2(+) and O(+) density profiles. In addition, the reaction of O2(+) with N(4S) is found to be an important sink for O2(+) and a source of NO(+) ions. Implications of the observed and calculated near constancy of electron and ion densities with altitude when NO(+) is the dominant ion on the growth of large-scale irregularities are also considered
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 85; Feb. 1
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  • 8
    Publication Date: 2011-08-18
    Description: A detailed study of the photochemistry of iodine and its oxides indicates that iodine species may play an important role in the tropospheric photochemical system. Methyl iodide, often observed in the marine troposphere with an average concentration of 5-10 ppt, is photolyzed and thereby produces I atoms. Chemical interactions with O3, HxOy, and NOx cause I to be converted to other inorganic compounds such as IO, HOI, IONO2, and I2. The production of these species and their subsequent recycling back to I can lead to the catalytic removal of tropospheric O3, the enhancement of the NO2/NO ratio, the destruction of HxOy free radicals, and the conversion of HO2 to OH. Ultimately, tropospheric inorganic iodine is removed by heterogeneous processes. Calculations using a numerical model to simulate tropospheric photochemistry indicate that iodine may have a strong impact upon the atmospheric O3-NOx-HxOy system. The magnitude of these effects is dependent upon the value of several uncertain rate constants and the primary source distributions of CH3I and other organic and inorganic iodine compounds.
    Keywords: GEOPHYSICS
    Type: Journal of Geophysical Research; 85; Dec. 20
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  • 9
    Publication Date: 2011-08-18
    Description: Rocket observations of the dayglow spectrum between 530 and 1500A were obtained on 9 January 1978 at a solar zenith angle of 56 deg. Data were obtained from 80 to 260 km with viewing angles of 40, 90, and 180 deg to the local zenith. OI emissions were observed at 989, 1027, 1152, 1304, and 1356A. Analysis of these data with a radiative transfer model using the energy dependences of currently accepted excitation cross sections, branching ratios and photoelectron fluxes shows that electron impact excitation is the primary source of these emissions. The infrared emission rates at 7990 and 11287A are also calculated in this analysis for comparison with previous observations and estimates.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters; 7; Dec. 198
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  • 10
    Publication Date: 2011-08-17
    Description: Ballon-borne infrared solar spectra at about 0.02/cm resolution show a number of atmospheric NO lines isolated from other atmospheric and solar lines in the 1830-1930/cm region. Typical spectra are presented and NO total column values are derived.
    Keywords: GEOPHYSICS
    Type: Geophysical Research Letters; 7; Sept
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