2026-03-12T14:06:41.000Z 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 Demoto Bamba Cruz (RCO)--> Bamba (CO) 206 Coronal Loop Obs Active Region FP FP 12526 5 20160331_110905 401 428 429 5 5 2000 2 1 1 2 0 21 2028 990 0.99 375.954 57.931 313.83 162.304 2016-03-31T11:09:05.000Z 2016-03-31T12:12:18.000Z 375.954 57.931 Observation of Coronal Loop Footpoints Fast map, full FOV, Q65, 1-side CCD Dear COs, I have a suggestion for the next OP (Thursday). There are some AIA 171 loops extending from the sunspot to the *west* that are quite clean (see image). From the EIS point of view it would be interesting to get Doppler measurements at both footpoints of these loops. When we observe these loops rooted in sunspots we always see strong downflows into the sunspot, but an open question has been whether there are upflows at the other footpoint corresponding to a siphon flow. This would be a good opportunity to check. For EIS I would suggest running HPW021VEL360x512v1_b (ID: 523) to cover the entire loops. In this case the pointing would be (+12,+60) at 29-Mar-2016, 19:34 UT. The duration is 3hr 16min. If data volume is a problem, then an option is to do two pointings of HPW021VEL120x512v2_b (ID: 521). The pointings would be (+100,+49) followed by (-130,+47) [both times at 29-Mar-2016 19:34]. 50min are required at each pointing. For the latter option, it would be possible to get SOT data at the footpoints. For XRT I would suggest some combination of cool filters to try and see these loops. It would be preferable to observe the loops early in the OP in order to have the best viewing geometry. Thanks, Peter SP Main # 5, ID: 0x191 Fast map, full FOV, Q65, 1-side CCD ivo://sot.lmsal.com/VOEvent#2016-03-31T11:07:00Z