Daily values of the solar SXR background and modulation of GCRs (1987, 1988, 1990 and 1992)

We present here the results of the intercorrelation analysis between the daily Calgary Galactic Cosmic Ray intensity values (CNI) and daily solar SXR background (XBG - unresolved full-sun SXR GOES flux). The anticorrelation between CNI and XBG is statistically significant for 1987, 1988 and 1992 sequences. In 1990, no anticorrelation between CNI and XBG was found. The latter fact gives evidence for the Global Merged Interaction Region (GMIR) being the most dominant GCR modulation structure of the 1990's outer heliospherical system, while local heliospherical structures seemed to play the secondary role.