IAP-P Doppler sounder spectrograms

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    <name>IAP-P Doppler sounder spectrograms</name>
    <description>The continuous Doppler sounding is based on the measurement of Doppler shift, which 
    experience the radio waves that reflect from the ionosphere. The Doppler shift results 
    from the motion of reflecting level or from the changes of electron densities.</description>
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                <linkage>
                    <gmd:URL>http://datacenter.ufa.cas.cz/</gmd:URL>
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                <name>Doppler Sounder Spectrogram Image Portal</name>
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                <description>
                      The latest Doppler shift spectrograms and archive. 
                </description>
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