{"id":97,"date":"2015-05-29T17:53:32","date_gmt":"2015-05-29T17:53:32","guid":{"rendered":"http:\/\/www.issibern.ch\/teams\/solarcorona\/?page_id=97"},"modified":"2015-05-29T17:53:32","modified_gmt":"2015-05-29T17:53:32","slug":"nlfff-extrapolations-of-ar10978-data-download-webpage","status":"publish","type":"page","link":"https:\/\/www.issibern.ch\/teams\/solarcorona\/nlfff-extrapolations-of-ar10978-data-download-webpage\/","title":{"rendered":"NLFFF extrapolations of AR10978 \u2014 ancillary data"},"content":{"rendered":"

The results from a study to discern the dependence on spatial resolution by the various nonlinear force-free field (NLFFF) extrapolation methods are described in the Astrophysical Journal (http:\/\/dx.doi.org\/10.1088\/0004-637X\/811\/2\/107<\/a>). The citations for the boundary data used to constrain the NLFFF extrapolations, as well as the analysis volumes of the extrapolations themselves, are below. Clicking on the DOI links will lead to a webpage from which the data can be downloaded.<\/p>\n\n\n\n\n
Boundary data<\/b><\/td>\nDeRosa, M.L. et al., 2015, “NLFFF extrapolations of AR10978 \u2014 boundary data”, http:\/\/dx.doi.org\/10.7910\/DVN\/KOUAOU<\/a>, Harvard Dataverse, v1.2<\/td>\n<\/tr>\n
Analysis volumes<\/b><\/td>\nDeRosa, M.L. et al., 2015, “NLFFF extrapolations of AR10978 \u2014 analysis volumes”, http:\/\/dx.doi.org\/10.7910\/DVN\/7ZGD9P<\/a>, Harvard Dataverse, v1.2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Introduction<\/h3>\n

The results from a study to discern the dependence on spatial resolution by the various nonlinear force-free field (NLFFF) extrapolation methods are described in the Astrophysical Journal. This webpage provides links to the boundary data used to constrain the NLFFF extrapolations, as well as to the analysis volumes of the extrapolations themselves.<\/p>\n

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Links to boundary data<\/h3>\n

The remapped vector magnetogram data that were used as lower boundary conditions to produce the NLFFF extrapolations are available for download via the links in the table below. As described in the ApJ article, the data have been interpolated onto a uniform grid, and projected to a helioplanar coordinate system so that the data appear as if AR10978 were at disk center. The data and metadata are stored in the nonproprietary HDF5 format<\/a>, for which bindings exist in C, C++, Fortran90, IDL, Java, MATLAB, Python, R, etc. For each case, the data file contains the following arrays:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
I_CONT<\/tt><\/p>\ncontinuum image<\/tr>\n
BXH<\/tt><\/p>\nBx<\/sub> component, fill-fraction included, in G<\/tr>\n
BYH<\/tt><\/p>\nBy<\/sub> component, fill-fraction included, in G<\/tr>\n
BZH<\/tt><\/p>\nBz<\/sub> component, fill-fraction included, in G<\/tr>\n
JZ<\/tt><\/p>\nnormal component Jz<\/sub> of the current density, in mA\/m2<\/sup><\/tr>\n
ALPHA<\/tt><\/p>\nforce-free parameter α, equivalent to Jz<\/sub>\/Bz<\/sub>, in Mm−1<\/sup><\/tr>\n
ERR_BXH<\/tt><\/p>\nuncertainty in Bx<\/sub> component, propagated from the inversion output and not including disambiguation uncertainties<\/tr>\n
ERR_BYH<\/tt><\/p>\nuncertainty in By<\/sub> component, propagated from the inversion output and not including disambiguation uncertainties<\/tr>\n
ERR_BZH<\/tt><\/p>\nuncertainty in Bz<\/sub> component, propagated from the inversion output and not including disambiguation uncertainties<\/tr>\n
ERR_JZ<\/tt><\/p>\nuncertainty in Jz<\/sub>, propagated from the inversion output and not including disambiguation uncertainties<\/tr>\n
ERR_ALPHA<\/tt><\/p>\nuncertainty in α, propagated from the inversion output and not including disambiguation uncertainties<\/tr>\n
ERR_BXH_WD<\/tt><\/p>\nuncertainty in Bx<\/sub> component, as above but also including a penalization effect if AMBIG_CONF<\/tt> is less than 0.9<\/tr>\n
ERR_BYH_WD<\/tt><\/p>\nuncertainty in By<\/sub> component, as above but also including a penalization effect if AMBIG_CONF<\/tt> is less than 0.9<\/tr>\n
ERR_BZH_WD<\/tt><\/p>\nuncertainty in Bz<\/sub> component, as above but also including a penalization effect if AMBIG_CONF<\/tt> is less than 0.9<\/tr>\n
ERR_JZ_WD<\/tt><\/p>\nuncertainty in Jz<\/sub>, as above but also including a penalization effect if AMBIG_CONF<\/tt> is less than 0.9<\/tr>\n
ERR_ALPHA_WD<\/tt><\/p>\nuncertainty in α, as above but also including a penalization effect if AMBIG_CONF<\/tt> is less than 0.9<\/tr>\n
AMBIG_CONF<\/tt><\/p>\nconfidence level in ambiguity resolution (ranges from 0.5 to 1.0)<\/tr>\n
ORIG_LATITUDE<\/tt><\/p>\noriginal latitude of each observed point<\/tr>\n
ORIG_CMD<\/tt><\/p>\noriginal longitude (central meridian distance) of each observed point<\/tr>\n
LOC_XY<\/tt><\/p>\nlocation, relative to disk center, in Mm of each point for x and y<\/tr>\n
OKDATA<\/tt><\/p>\nmask showing where edges that have no data reside (residual from interpolation to regularly spaced grid)<\/tr>\n<\/table>\n

Each file also contains a POINT<\/tt> substructure that contains information about the remapping. The most useful quantities are probably XY_SIZE<\/tt> (the pixel size of the remapped data in Mm) and RADIUS<\/tt> (the radius of the sun in arcseconds as viewed from the Hinode spacecraft).In the uncertainties having the _WD<\/tt> suffix, note that disambiguation uncertainties were propagated as follows: where 100 trials (100 random number seeds) of the disambiguation did not agree 90% of the time, those azimuth errors were set to 180°, possibly resulting in apparently large spikes in uncertainties (as compared with more reasonable neighboring pixels). Most of these are in weak-signal areas, but not all. However, in strong-signal areas, these uncertainty spikes occur where, e.g., there’s a divergence-point and the single Btrans<\/sub> vector in the middle of it is undetermined (that is, it could just really go either way).<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
\nBoundary Data File<\/p>\nFile Size<\/p>\n
Bin 2<\/p>\nbin02_BC.h5<\/a><\/p>\n19 MB<\/p>\n
Bin 3<\/p>\nbin03_BC.h5<\/a><\/p>\n8.6 MB<\/p>\n
Bin 4<\/p>\nbin04_BC.h5<\/a><\/p>\n4.8 MB<\/p>\n
Bin 6<\/p>\nbin06_BC.h5<\/a><\/p>\n2.1 MB<\/p>\n
Bin 8<\/p>\nbin08_BC.h5<\/a><\/p>\n1.2 MB<\/p>\n
Bin 10<\/p>\nbin10_BC.h5<\/a><\/p>\n780 KB<\/p>\n
Bin 12<\/p>\nbin12_BC.h5<\/a><\/p>\n540 KB<\/p>\n
Bin 14<\/p>\nbin14_BC.h5<\/a><\/p>\n400 KB<\/p>\n
Bin 16<\/p>\nbin16_BC.h5<\/a><\/p>\n320 KB<\/table>\n
\n

Links to extrapolation analysis volumes<\/h3>\n

The analysis volumes from all 71 NLFFF extrapolations that were analyzed as part of the ApJ article are available for download via the links in the table below, organized by method\/code (CFIT, FEMQ, magnetofrictional, optimization, and XTRAPOL) and bin level. For the Grad-Rubin methods, both the N<\/em> and P<\/em> solutions are provided. As above, the data are stored in the HDF5 format<\/a>, and in each file are included the extrapolation cubes as well as arrays that index each of the three dimensions (in Mm).<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
\nCFIT<\/p>\nFEMQ<\/p>\nMagnetofrictional<\/p>\nOptimization<\/p>\nXTRAPOL<\/p>\nFile Size<\/p>\n
Bin 2<\/p>\nbin02_cfit.N.h5<\/a>
\nbin02_cfit.P.h5<\/a><\/p>\n		bin02_femq.N.h5<\/a>
\nbin02_femq.P.h5<\/a><\/p>\n		bin02_magf.h5<\/a><\/p>\nbin02_opti.h5<\/a><\/p>\nbin02_xtra.N.h5<\/a>
\nbin02_xtra.P.h5<\/a><\/p>\n		450 MB<\/p>\n
Bin 3<\/p>\nbin03_cfit.N.h5<\/a>
\nbin03_cfit.P.h5<\/a><\/p>\n		bin03_femq.N.h5<\/a>
\nbin03_femq.P.h5<\/a><\/p>\n		—<\/p>\nbin03_opti.h5<\/a><\/p>\nbin03_xtra.N.h5<\/a>
\nbin03_xtra.P.h5<\/a><\/p>\n		135 MB<\/p>\n
Bin 4<\/p>\nbin04_cfit.N.h5<\/a>
\nbin04_cfit.P.h5<\/a><\/p>\n		bin04_femq.N.h5<\/a>
\nbin04_femq.P.h5<\/a><\/p>\n		bin04_magf.h5<\/a><\/p>\nbin04_opti.h5<\/a><\/p>\nbin04_xtra.N.h5<\/a>
\nbin04_xtra.P.h5<\/a><\/p>\n		57 MB<\/p>\n
Bin 6<\/p>\nbin06_cfit.N.h5<\/a>
\nbin06_cfit.P.h5<\/a><\/p>\n		bin06_femq.N.h5<\/a>
\nbin06_femq.P.h5<\/a><\/p>\n		bin06_magf.h5<\/a><\/p>\nbin06_opti.h5<\/a><\/p>\nbin06_xtra.N.h5<\/a>
\nbin06_xtra.P.h5<\/a><\/p>\n		17 MB<\/p>\n
Bin 8<\/p>\nbin08_cfit.N.h5<\/a>
\nbin08_cfit.P.h5<\/a><\/p>\n		bin08_femq.N.h5<\/a>
\nbin08_femq.P.h5<\/a><\/p>\n		bin08_magf.h5<\/a><\/p>\nbin08_opti.h5<\/a><\/p>\nbin08_xtra.N.h5<\/a>
\nbin08_xtra.P.h5<\/a><\/p>\n		7.4 MB<\/p>\n
Bin 10<\/p>\nbin10_cfit.N.h5<\/a>
\nbin10_cfit.P.h5<\/a><\/p>\n		bin10_femq.N.h5<\/a>
\nbin10_femq.P.h5<\/a><\/p>\n		bin10_magf.h5<\/a><\/p>\nbin10_opti.h5<\/a><\/p>\nbin10_xtra.N.h5<\/a>
\nbin10_xtra.P.h5<\/a><\/p>\n		3.7 MB<\/p>\n
Bin 12<\/p>\nbin12_cfit.N.h5<\/a>
\nbin12_cfit.P.h5<\/a><\/p>\n		bin12_femq.N.h5<\/a>
\nbin12_femq.P.h5<\/a><\/p>\n		bin12_magf.h5<\/a><\/p>\nbin12_opti.h5<\/a><\/p>\nbin12_xtra.N.h5<\/a>
\nbin12_xtra.P.h5<\/a><\/p>\n		2.2 MB<\/p>\n
Bin 14<\/p>\nbin14_cfit.N.h5<\/a>
\nbin14_cfit.P.h5<\/a><\/p>\n		bin14_femq.N.h5<\/a>
\nbin14_femq.P.h5<\/a><\/p>\n		bin14_magf.h5<\/a><\/p>\nbin14_opti.h5<\/a><\/p>\nbin14_xtra.N.h5<\/a>
\nbin14_xtra.P.h5<\/a><\/p>\n		1.4 MB<\/p>\n
Bin 16<\/p>\nbin16_cfit.N.h5<\/a>
\nbin16_cfit.P.h5<\/a><\/p>\n		bin16_femq.N.h5<\/a>
\nbin16_femq.P.h5<\/a><\/p>\n		bin16_magf.h5<\/a><\/p>\nbin16_opti.h5<\/a><\/p>\nbin16_xtra.N.h5<\/a>
\nbin16_xtra.P.h5<\/a><\/p>\n		1.0 MB<\/table>\n
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The results from a study to discern the dependence on spatial resolution by the various nonlinear force-free field (NLFFF) extrapolation methods are described in the Astrophysical Journal (http:\/\/dx.doi.org\/10.1088\/0004-637X\/811\/2\/107). The citations for the boundary data used to constrain the NLFFF extrapolations, … Continue reading →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-97","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.issibern.ch\/teams\/solarcorona\/wp-json\/wp\/v2\/pages\/97","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.issibern.ch\/teams\/solarcorona\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.issibern.ch\/teams\/solarcorona\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.issibern.ch\/teams\/solarcorona\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.issibern.ch\/teams\/solarcorona\/wp-json\/wp\/v2\/comments?post=97"}],"version-history":[{"count":0,"href":"https:\/\/www.issibern.ch\/teams\/solarcorona\/wp-json\/wp\/v2\/pages\/97\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.issibern.ch\/teams\/solarcorona\/wp-json\/wp\/v2\/media?parent=97"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}