Temporal Change of Magnetic Shear Free from the 180arcdeg Ambiguity Moon, Y. -J. ; Wang, Haimin ; Spirock, Thomas J. ; Park, Y. D. Abstract Publication: Journal of Korean Astronomical Society Pub Date: September 2002 DOI: 10.5303/JKAS.2002.35.3.143 Bibcode: 2002JKAS...35..143M