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Solar CME Fitting and Comparison Study in March 2012

This study focuses on fitting and comparing solar coronal mass ejections (CMEs) using various models and operational data from March 2012. The analysis includes data from different research teams and computational scripts, aiming to understand CME parameters and possible space weather effects. The results were obtained through rigorous simulations and post-processing procedures for detailed examination. The research aims to enhance our knowledge of solar activities and their impacts on space weather.

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Solar CME Fitting and Comparison Study in March 2012

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  1. Simulated Period: 2012-03-05T00 – 2012-03-20T00 (15 days) Master scripts: – wsadt-cdat –CME parameters in a single file – wsadt-cdir –CME parameters in individual files in yyyy/mm directory CME parameters – scientific fitting (Hong Xie, 5 CMEs): – cmes-hx3.2012-mar.dat – elliptical cone from GCS model: Lat, Lon, Rmaj, Rmin, Tilt, Vcme – cmes-hx2.2012-mar.dat – circular cone from “hx3”: Lat, Lon, Rmaj, Vcme – cmes-hx1.2012-mar.dat – circular cone from “hx3”: Lat, Lon, Rmin, Vcme CME parameters – operational fitting (SWPC team, 12 CMEs): – cmes-swpc2.2012-mar.dat – (original swpc data as revised by Doug Biesecker) CME parameters – operational fitting (SWRC team, 29 CMEs): – $datadir/CMEs/DONKEY/yyyy/mm/yyyy-mm-ddThh:mm:ss-CME-xxx.dat – $datadir/CMEs/SWRC/yyyy/mm/yyyymmdd_hhmmss_Dusans_file 2012 March – Overview of Computations

  2. hx1 hx2 hx3 2012 March – In-Situ Comparison

  3. swpc2 swrc donkey 2012 March – In-Situ Comparison

  4. 2012 March – Possible SEP Effect – hx1

  5. 2012 March – Possible SEP Effect – hx2

  6. 2012 March – Possible SEP Effect – hx3

  7. 2012 March – Possible SEP Effect – swpc2

  8. 2012 March – Possible SEP Effect – swrc

  9. 2012 March – Possible SEP Effect – donkey

  10. Presented results were computed by running the “wsadt-cdat” and “wsadt-cdir” scripts: wsadt-cdat –cld hx3 –tfile cmes-hx3.2012-mar.dat wsadt-cdat –cld hx2 –tfile cmes-hx2.2012-mar.dat wsadt-cdat –cld hx1 –tfile cmes-hx1.2012-mar.dat wsadatcdat –cld swpc2 -tfile cmes-swpc2.2012-mar.dat wsadt-cdir –cld donkey –tdataCMEs/DONKEY wsadr-cdir –cldswrc –tdadaCMEs/SWRC The following default values were used (in those two scripts): reg=reg2 – computational domain up to 1.7 AU res=low – numerical grid resolution of 4-degs angularly tstop=360 – computations last 360 hours = 15 days nblk=2 – computation is on two blocks (one for background, other for background+transients) “Final” SEP application may require (some or all of) the following modifications: <script> -reg reg5 –res med –tstop 480 –nblk <nblk> I.e., computing up to 5.3 AU on 2-degs for 20 days on number of blocks that equals to number of CMEs plus one (for computing just background). 2012 March – Next Runs

  11. Post-processing is broken to six steps (in the given-below order), using IDL procedures, for easier development/experimentation: sho1-params1 – Reads in evo.*.nc, fld.*.nc, and tim.*nc files, calculates the shock parameters sho2-smooth1 – Smoothing of shock parameters sho3-plt<x> -- Various plotting procedures sho4-datsho – Interpolates from 1-hour-cadence results into 10-minute cadence and writes the text file with shock parameters sho5-datbnd – writes the text file with IMF line end positions at the inner boundary sho6-datfld – writes the text file with solar winds parameters along the IMF line Post-processing for SEPMOD

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