@article{oai:nagoya.repo.nii.ac.jp:00020189,
 author = {Kojima, Masayoshi and Kakinuma, Takakiyo},
 journal = {Proceedings of the Research Institute of Atmospherics, Nagoya University},
 month = {Mar},
 note = {Long-term evolution of the solar wind structure in the heliographic longitude and latitude was studied on the basis of observations of interplanetary scintillation. The evolution from 1983 to 1985 was studied using two-dimensional solar wind maps. These were made with a new mapping method developed to investigate the structure of solar wind in detail. In this period of low solar activity, the lowspeed regions are distributed along the wavy neutral sheet made by the magnetic dipole and quadrupole field. The higher-speed regions were more fully developed in the northern hemisphere than in the southern hemisphere. Large latitudinal gradients of speed were developed at the latitude where the high speed region extended. Breadth of the low speed region decreased with subsiding solar activity. Two localized minimum-speed regions appeared on the neutral sheet and their locations coincide with those of the two giant bipolar magnetic regions. These two minimum-speed regions are longitudinally separated almost by 180°.},
 pages = {1--18},
 title = {THREE-STATION OBSERVATIONS OF INTERPLANETARY SCINTILLATION AT 327 MHz-II : EVOLUTION OF TWO-DIMENSIONAL SOLAR WIND SPEED STRUCTURE DURING 1983 TO 1985},
 volume = {33},
 year = {1986}
}