2025-08-31T18:34:15.000Z http://sot.lmsal.com Mr. Sam Freeland Lockheed Martin Solar and Astrophysics Laboratory (LMSAL) http://www.lmsal.com Lockheed Martin Advanced Tech Center, 3251 Hanover Rd, O/ADBS, B/252, Palo Alto, CA 94304 null null HINODE SOTSP Kotanagi K. Watanabe Tiwari (RCO) -> Kubo 485 HOP 485 S60 high-lat mag field Quiet Sun QS QS 10 20241024_113033 197 218 236 10 26 2046 6 1 1 2 0 51 2014 981 0.958944 -21.191 -911.81 310.977 162.304 2024-10-24T11:30:33.000Z 2024-10-24T14:24:07.000Z -21.191 -911.81 High-latitude magnetic field evolution during the sunspot cycle Fast deep mode, 2048 slit position, LIMB ONLY Main Objective: Observe high-latitude magnetic field evolution during the sunspot cycle Scientific Justification: SDO/HMI full-disk magnetograms suggest the appearance and advection of patches of mixed polarity, in latitudes ranging from 50 to 70 degrees in each hemisphere. These magnetic field concentrations hold important information as to polar field evolution, both in the reversal of the polar cap and in the strengthening of the new one, throughout each sunspot cycle. We propose to monitor regions that center at latitude of 60 degrees in each hemisphere, at least once per month, in a similar manner to HOP81 fast scan mode. These observations complement the existing series of high-quality magnetogram data from SOT of the polar regions under HOP 81 and HOP 206, which cover heliographic latitudes poleward of 70 degrees. ivo://sot.lmsal.com/VOEvent#2024-10-24T11:30:00Z