P. Gömöry1,
J. Rybák1,
A. Kucera1,
W. Curdt2,
H. Wöhl3
1Astronomical Institute of the Slovak Academy of Sciences,
SK-05960 Tatranská Lomnica, Slovakia
2Max-Planck-Institut für Aeronomie, D-37189 Katlenburg-Lindau, Germany
3Kiepenheuer-Institut für Sonnenphysik, D-79104 Freiburg, Germany
SOHO/CDS measurements of the quiet Sun chromospheric He I 584.33 A, and transition region O V 629.73 A spectral lines are used to study ability of the CDS instrument to detect the Doppler shifts of spectral lines in the supergranular network and internetwork using short exposures. Precise analysis has shown that the CDS instrument is not suitable for the detection of the mass motion in the internetwork, but in contrast, it is suitable for such detection in the network.
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