2024-10-23T19:27:06.000Z http://sot.lmsal.com Ted Tarbell LMSAL http://lmsal.com 3251 Hanover Rd, O/ADBS, B/252, Palo Alto, CA, 94304 +1-650-424-2400 tarbell@lmsal.com Hinode SOTSP Kotanagi K. Watanabe Tiwari (RCO) -> Kubo 485 485 null HOP 485 S60 high-lat mag field QS QS Quiet Sun 10 -22 -919 0 0 2024-10-24T11:30:00.000Z 2024-10-24T15:25:35.000Z -22 -919 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.