Properties of coronal hole/streamer boundaries and adjacent regions as observed by Spartan 201

The Spartan 201 flights from 1993 to 1995 provided us with observations in H I Lyman-alpha of several coronal hole/streamer boundaries and adjacent st reamers during the declining phase of the current solar cycle. Analysis of the latitudinal dependence of the line intensities clearly shows that there is a boundary region at the coronal hole/streamer interface where the H I Lyman-alpha intensity reaches a minimum value. Similar results are also fou nd in UVCS/SOHO observations. We also discuss differences in the coronal ho le/streamer boundaries for different types of streamers and their changes o ver the three year period of Spartan 201 observations.