2024-09-10T01:05:51.633864Z http://sot.lmsal.com Mr. Sam Freeland Lockheed Martin Solar and Astrophysics Laboratory (LMSAL) http://www.lmsal.com Lockheed Martin ATC, 3251 Hanover St., Palo Alto, CA 94306 null null HINODE SOTSP Tohbans: Arikawa Planner: Sterling Observer: Morinaga 0 HOP 39 Coronal Hole Boundary Active Region CH CH 6 20071116_160006 30 49 52 6 51 2000 2 2 1 0 2 142 2026 1000 1.0 224.919 923.144 317 162.304 2007-11-16T16:00:06.000Z 2007-11-16T17:03:19.000Z 224.919 923.144 Fast Map, Full FOV SCIENCE OBJECTIVE: We propose to study the sources of fast and slow solar wind by investigating how the flux tubes change from a high-speed to a low-speed region. We will select a polar hole with a clearly-defined streamer region nearby and study both regions and the boundary between the polar coronal hole and the surrounding quiet Sun region from the limb to UVCS heights. We aim to measure how the plasma physical properties change between the two wind regions, and with height, and how the flux tubes expand with heliocentric distance. In particular, this campaign will study the evolution of the transition from fast to slow wind source regions as a function of time and heliocentric distance from the limb and will provide important experimental constraints to theoretical models.