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  • 1
    Electronic Resource
    Electronic Resource
    Space physics coordinate transformations: the role of precession (1995)
    Springer
    Annales geophysicae 13 (1995), S. 713-716 
    Details
    ISSN: 0992-7689
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Raw data on spacecraft orbits and attitude are usually supplied in “inertial” coordinates. The normal geocentric inertial coordinate system changes slowly in time owing to the effects of astronomical precession and the nutation of the Earth’s rotation axis. However, only precession produces a change that is significant compared with the errors in determining spacecraft position. We show that the transformations specified by Russell (1971) and Hapgood (1992) are strictly correct only if the epoch-of-date inertial system is used. We provide a simple formula for estimating the error in the calculated position if the inertial system for some other epoch is used. We also provide a formula for correcting inertial coordinates to the epoch-of-date from the standard fixed epoch of J2000.0.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s00585-995-0713-8
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fragmentation of a meteor in near-Earth space (1981)
    [s.l.] : Nature Publishing Group
    Nature 290 (1981), S. 384-386 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Table 1 Meteor parameters Meteor 1 Meteor 2 Meteor 3 Geocentric radiant: RA(a) 3 h 26 min 3h 31 min 3 h 19 min Dec (d) +53,7 +54.2o +53.8 Geocentric velocity (kms-1) 59±2 59±2 56±3 Apparent magnitude 2.0±0.5 2.1±0.5 3.5±0.5 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/290384a0
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    IR observation of a persistent meteor train (1980)
    [s.l.] : Nature Publishing Group
    Nature 286 (1980), S. 582-583 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The persistent train was recorded between 01.30 and 02.02 UT on 19 September 1979 from the Jungfraujoch Observatory in the Swiss Alps (4633'N, 759'E, 3,570 m). The train was observed with an image isocon television camera used in integration mode to image structure in the near IR airglow. A picture ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/286582a0
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    THE JOINT SCIENCE OPERATIONS CENTRE (1997)
    Springer
    Space science reviews 79 (1997), S. 487-525 
    Details
    ISSN: 1572-9672
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Joint Science Operations Centre (JSOC) has been established to provide the operational interface between the Instrument Principal Investigators (PIs) and the European Space Operations Centre (ESOC). Its key task will be to merge inputs from the Cluster instrument teams and to generate the coordinated command schedule for operation of the scientific payload. In addition, it will collect and process data needed to plan those operations and will monitor the performance of the mission and individual instruments. This paper outlines the JSOC subsystems that have been built to carry out these tasks and highlights points of scientific or technical interest within these systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004954504114
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    Paper (German National Licenses)
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