Abstract:
Using KPNO helium 10830Å synoptic charts of Carrington rotation 1716 through 1739, and by assembling a time sequence representing single latitude zone, rotational properties of coronal holes for five zones of latitudes (±10°, ±20°-±40°, and ±40°-±60°) have been examined. It seems that the rotation period of coronal holes is a function of latitude, thus reflecting differential rotation of coronal holes.
