The heliosphere in rising phase and the triple-dipole model Original Research Article

The 22-year variation of the structure of the heliosphere has been studied in relation to the triple, dipole model. The variation is well explained by the model, if coronal streamers, especially in rising phase of a solar cycle, are classified into two: magnetically bipolar streamer emanating radially along the heliomagnetic equatorial plane, and unipolar streamer emanating non-radially from the magnetically high latitude regions.