Post on 08-Jan-2016
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Measurements of Measurements of the altitudes of solar the altitudes of solar
filamentsfilaments
Guy ArtznerGuy ArtznerInstitut d’Astrophysique SpatialeInstitut d’Astrophysique Spatiale
OrsayOrsay
Guy.artzner@m4x.orgGuy.artzner@m4x.orgftp://ftp.ias.u-psud.fr/gartzner/ftp_projet/Secchi/ftp://ftp.ias.u-psud.fr/gartzner/ftp_projet/Secchi/
Meudon April 22, 2008Meudon April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis Large basisLarge basis
may 1st ,2007 03h 51m may 1st ,2007 03h 51m
no adjustments: no adjustments: strenuous crossed viewingstrenuous crossed viewing
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis Wide basisWide basis
may 1st ,2007 03h 51m may 1st ,2007 03h 51m
crossed views: crossed views: Visually correct adjustment with StereoPhotoMaker Visually correct adjustment with StereoPhotoMaker procedureprocedure
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis wide basiswide basis
may 1st ,2007 03h 51m may 1st ,2007 03h 51m
Visually correct adjustment with FITS parametersVisually correct adjustment with FITS parameters
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis Large basisLarge basismay 1st ,2007 03h 51m may 1st ,2007 03h 51m
Stereo PhotoMakerStereo PhotoMaker
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small or wide basisSmall or wide basis
Numerical projection methodNumerical projection methodEvery point Pa of a (right) view from STEREO-A has two integer coordinates ia and ja . This point is colored in blue, according to the corresponding intensity. We firstly compute the cartesian coordinates (x,y,z) of the physical point M at the intersection of the line of sight with the sphere of radius R centered on the Sun’s center.We then compute the image coordinates ib and jb of the image point Pb corresponding to the physical point M in the (left) STEREO-B image. The point Pa is colored in red, according to the intensity actually measured at the location Pb in the STEREO-B image.
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
LUNIK IIILUNIK IIIHistoire de deux Histoire de deux planètesplanètesGérard P. KuiperGérard P. KuiperL’AstronomieL’Astronomie , pp. 322-328, nov. 1962 , pp. 322-328, nov. 1962
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis Large basisLarge basismay 1st ,2007 03h 51m may 1st ,2007 03h 51m
STEREO-B view STEREO-B view projected on theprojected on the STEREO-A view STEREO-A view
according to the according to the FITS headersFITS headers
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis Large basisLarge basismay 1st ,2007 03h 51m may 1st ,2007 03h 51m
STEREO-B view STEREO-B view projected on theprojected on the STEREO-A view STEREO-A view
after an automaticafter an automaticadjustment ofadjustment ofONE angularONE angularparameterparameter
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
700 Mm 700 Mm 710Mm710Mm
720Mm 720Mm 730Mm730Mm
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis Large basisLarge basis
may 1st ,2007 03h 51m may 1st ,2007 03h 51m
Medicis correlatorMedicis correlator
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis 45.2° large 45.2° large basisbasis
february 2 ,2008 00h06m 2008 february 2 ,2008 00h06m 2008 600 seconds cadence600 seconds cadence 500 pixels 500 pixels parallaxparallax
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis 45.2° large 45.2° large basisbasisfebruary 2 , 19h56m - february 3, 05h06m 2008 february 2 , 19h56m - february 3, 05h06m 2008 600 pixels parallax 600 pixels parallax
Medicis correlator Medicis correlator Reference ZoneReference Zone
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis Large basisLarge basis Medicis Medicis correlatorcorrelator
X: time X: time february 1 , 19h56m - february 3, 05h06m 2008 february 1 , 19h56m - february 3, 05h06m 2008 Reference Reference ZoneZoneY: Y: amount of the east-west component of the average vector between homologous amount of the east-west component of the average vector between homologous
pointspoints -2 to +6 pixels: 7 000 km solar asphericity OR residual defects of relative adjustments -2 to +6 pixels: 7 000 km solar asphericity OR residual defects of relative adjustments between A and B?between A and B?
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis 45.2° large 45.2° large basisbasisfebruary 2 , 19h56m - february 3, 05h06m 2008 february 2 , 19h56m - february 3, 05h06m 2008 600 pixels parallax 600 pixels parallax
Medicis correlator Medicis correlator Zone#1Zone#1
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis Large basisLarge basis Medicis Medicis correlatorcorrelator
X: time X: time february 1 , 19h56m - february 3, 05h06m 2008 february 1 , 19h56m - february 3, 05h06m 2008 Zone#1Zone#1Y: Y: east-west location of the barycenter of the largest connex region where east-west location of the barycenter of the largest connex region where the east-west component of the correlation vector is larger than 10 pixelsthe east-west component of the correlation vector is larger than 10 pixelsa) effect of the solar rotationa) effect of the solar rotationb) the «horizontal» size of the frame is too small b) the «horizontal» size of the frame is too small
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis 45.2° large 45.2° large basisbasisfebruary 2 , 19h56m - february 3, 05h06m 2008 february 2 , 19h56m - february 3, 05h06m 2008 500 pixels parallax 500 pixels parallax
Medicis correlator Medicis correlator Zone#2Zone#2
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis Large basisLarge basis Medicis Medicis correlatorcorrelator
X: time X: time february 1 , 19h56m - february 3, 05h06m 2008 february 1 , 19h56m - february 3, 05h06m 2008 Zone#2Zone#2Y: Y: east-west location of the barycenter of the largest connex region where east-west location of the barycenter of the largest connex region where the east-west component of the correlation vector is larger than 10 pixelsthe east-west component of the correlation vector is larger than 10 pixelsa) effect of the solar rotationa) effect of the solar rotationb) the «horizontal» size of the frame is large enough in order to follow a b) the «horizontal» size of the frame is large enough in order to follow a solar structure solar structure
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis Large basisLarge basis Medicis correlatorMedicis correlator
X: time X: time february 1 , 19h56m - february 3, 05h06m 2008 february 1 , 19h56m - february 3, 05h06m 2008 Zone Zone #2#2Y: Y: amount of the east-west component of the average vector between amount of the east-west component of the average vector between
homologous pointshomologous points over the largest connex region where this quantity is larger over the largest connex region where this quantity is larger than than 1010 pixels pixels
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis Large basisLarge basis Medicis correlatorMedicis correlator
X: time X: time february 1 , 19h56m - february 3, 05h06m 2008 february 1 , 19h56m - february 3, 05h06m 2008 Zone Zone #2#2Y: Y: amount of the east-west component of the average vector between amount of the east-west component of the average vector between
homologous pointshomologous points over the largest connex region where this quantity is larger over the largest connex region where this quantity is larger than than 2020 pixels pixels
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis Large basisLarge basis Medicis correlatorMedicis correlator
X: time X: time february 1 , 19h56m - february 3, 05h06m 2008 february 1 , 19h56m - february 3, 05h06m 2008 Zone Zone #2#2Y: Y: amount of the east-west component of the average vector between amount of the east-west component of the average vector between
homologous pointshomologous points over the largest connex region where this quantity is larger over the largest connex region where this quantity is larger than than 3030 pixels pixels
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
STEREO Secchi EUVI 304ASTEREO Secchi EUVI 304A Small basisSmall basis Large basis CONCLUSIONSLarge basis CONCLUSIONS
For STEREO Secchi EUVI 304A images with a For STEREO Secchi EUVI 304A images with a separation angle as high as 45° we produced:separation angle as high as 45° we produced:_ anaglyphic views for the visual detection of high _ anaglyphic views for the visual detection of high altitude solar structures whitout binocular vision;altitude solar structures whitout binocular vision;_ maps of a quantity related to the altitude of _ maps of a quantity related to the altitude of structures.structures. _we further indicated how to calibrate this _we further indicated how to calibrate this quantity into altitudes.quantity into altitudes. Further work: Further work:_ time studies of transient events;_ time studies of transient events;_ study of high cadence 304A observations;_ study of high cadence 304A observations;_ 171A, 195 and 284 observations;_ 171A, 195 and 284 observations;_ taking into account the epipolar relation._ taking into account the epipolar relation.
Altitude of solar filaments Guy Artzner Altitude of solar filaments Guy Artzner MeudonMeudon April 22, 2008April 22, 2008
1 mars 20071 mars 2007
30 mai 30 mai 20072007
27 avril 200727 avril 2007
7 juin 7 juin 20072007
9 septembre 20079 septembre 2007
26mai200726mai2007
26 août 200726 août 2007