Abstract The diurnal rising and setting of the Sun severely compromises helioseismology from a single ground-based observatory. This periodic interruption creates sidelobes in power spectra at multiples of 1/day (11.57 μHz) centered around each solar line, contaminating the spectra and hampering mode identification and frequency measurement. So far, three strategies have been used to overcome the difficulty — observing from the Polar regions, observing with a network of stations placed around the Earth, or observing from a fully sunlit orbit in space. This paper reports on the status of the networks that are either currently in operation or being planned. These include the Global Oscillation Network Group (GONG) project, the Birmingham network, the IRIS network of the University of Nice, the SCLERA network of the University of Arizona, and the ESTEC network. The scientific objectives and instrumentation of these networks are briefly described. The relationship between networks and the helioseismology experiments on the SOHO mission are described.


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    Title :

    Ground-based helioseismology networks


    Contributors:

    Published in:

    Advances in Space Research ; 11 , 4 ; 149-158


    Publication date :

    1991-01-01


    Size :

    10 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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