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Fuzzy classification of coronal mass ejection properties
Tang, Y. H.; Han, Z. Z.
Fuzzy set theory is applied to a quantitative study of coronal mass ejection properties for importance category. The membership function can be determined according to statistical results and the correlation between CME morphology properties and characteristic factors. CME importance category has been obtained by data reduction. A useful software …
CCD observations for the Hipparcos star 104297 measured with respect to the Galilean satellite Callisto
Peng, Q. Y.; Li, Z. L.
CCD images for two Galilean satellites: Europa, Callisto and a bright star in Hipparcos Catalogue (No.104297) are obtained on 1 meter telescope at the Yunnan Observatory on the night of Nov.14, 1997. After the two satellites were measured for the scale and orientation of CCD frames, the apparent positions for the star were determined with respect …