This paper describes the data analysis technique used for magnetic testing at the NASA Goddard Space Flight Center (GSFC). Excellent results have been obtained using this technique to convert a spacecraft's measured magnetic field data into its respective magnetic dipole moment model. The model is most accurate with the earth's geomagnetic field cancelled in a spherical region bounded by the measurement magnetometers with a minimum radius large enough to enclose the magnetic source. Considerably enhanced spacecraft magnetic testing is offered by using this technique in conjunction with a computer-controlled magnetic field measurement system. Such a system, with real-time magnetic field display capabilities, has been incorporated into other existing magnetic measurement facilities and is also used at remote locations where transport to a magnetics test facility is impractical. Test results obtained from modeling magnetic fields around several different spacecraft and flight experiments indicate that the magnetic field modeling technique, combined with a computer-controlled measure system, provides capability for complex magnetic dipole moment analysis. Modeling accuracy is sufficient to provide detailed analysis of complex magnetic sources, even where field levels are less than 1.0 nT. The magnetic field modeling technique provides a rigorous method of determining the magnetic field at any point of interest around the spacecraft, based upon a limited number of measurements at discrete points. This enables a rapid and comprehensive evaluation of spacecraft magnetic fields for the solution of magnetometer bias and low-energy electron deflection problems. Presentation of the magnetic dipole moment model can he achieved in real-time, using high-speed data acquisition and analysis system (National Instruments hardware and LabView software) augmented by a CRT and laser printer. Similar systems have been incorporated into existing magnetic measurement facilities and also could be designed as part of the spacecraft checkout platform on the Space Shuttle. Magnetic testing using the Shuttle would allow measurements to be made on spacecraft operating in true flight configurations, significantly increasing the reliability and utility of the data.


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    Titel :

    Near-field magnetic dipole moment analysis


    Weitere Titelangaben:

    Analyse von magnetischem Dipolmoment im Nahfeldbereich


    Beteiligte:


    Erscheinungsdatum :

    2004


    Format / Umfang :

    198 Seiten, 1 Bild, 2 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Datenträger


    Sprache :

    Englisch