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SUMMARY:Time-normalized plasma flow mapping during the quadrature of SolO 
 and SDO
DTSTART;VALUE=DATE-TIME:20230512T101500Z
DTEND;VALUE=DATE-TIME:20230512T103000Z
DTSTAMP;VALUE=DATE-TIME:20240704T115655Z
UID:indico-contribution-352@meetings.aip.de
DESCRIPTION:Speakers: Gabriel Muro (Aberystwyth University)\nObservations 
 of plasma motions in the low corona are often limited to magnetic field li
 nes originating in active regions\, which are ideal for spatial domain enh
 ancements across individual extreme ultraviolet (EUV) images to see loops\
 , flares\, and other bright activity contrasted against dim background fea
 tures.\n\nThe quiet Sun is essentially all dim background features\, which
  requires advanced image processing and ideal observation parameters to em
 phasize the temporal domain in order to visualize faint\, fine-scale plasm
 a flows. We utilize time-normalized optical flow (TNOF) on large sets of h
 igh cadence EUV data by reducing instrumental noise to a high degree and t
 hen emphasizing the minor brightness variations indicative of plasma motio
 n. Maps of plasma flow paths are produced via optical flow tracking algori
 thms by the computer vision method of Lucas-Kanade and the underlying velo
 city field is estimated with line integral convolution.\n\nTo test the eff
 ectiveness of the TNOF approach\, we have applied this method to an EUV ca
 se study of data from EUI 174 and AIA 171 on 29 March 2022. This date mark
 ed a near-perpendicular line of sight orientation between the two spacecra
 ft\, had similarly short observation intervals\, and provided the opportun
 ity to compare contrast enhanced plasma features off-limb with temporally 
 enhanced on-disk plasma motion. \n\nIn this case study\, we generated movi
 es and flow paths that show TNOF succeeds at qualitatively outlining plasm
 a flow along magnetic field lines from both Solar Orbiter’s and SDO’s 
 point of view which are in general agreement with potential field models. 
 Additionally\, detailed velocities of plasma motion within coronal loops\,
  overall velocity trends\, and a new quasi-magnetic flow trend within the 
 quiet Sun are presented.\n\nhttps://meetings.aip.de/event/24/contributions
 /352/
LOCATION:Haus H\, Telegrafenberg
URL:https://meetings.aip.de/event/24/contributions/352/
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