  Since solar cycle 16, the { heliospheric} current sheet (HCS) has been found
to be shifted southward during the late declining to minimum phase. However,
this trend is broken at the end of solar cycle 24. In this paper, we analyze
the shift of the HCS by using information obtained from coronal model and
insitu data provide by the near-Earth OMNI database and the Parker Solar Probe
(PSP). Coronal potential field source surface (PFSS) modeling results show that
the northward shift is established at the beginning of 2018 and remains stable
for about two years. Interplanetary magnetic field data obtained from and
within 1 au also support the northward shift, as the southern polarity T
appears more frequently than the northern polarity A between 2018-2020. Both
model results and insitu observation obtained by PSP imply that the HCS shift
is established in the corona, and then propagates into the heliosphere. The
quadrupole term still has a significant influence on the formation of the HCS
shift.
