MSDP INSTRUMENT AND DATA at THEMIS and PIC DU MIDI Thierry ROUDIER, Nadège MEUNIER MSDP Workshop, Tarbes, 18-20th January 2006.

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Presentation transcript:

MSDP INSTRUMENT AND DATA at THEMIS and PIC DU MIDI Thierry ROUDIER, Nadège MEUNIER MSDP Workshop, Tarbes, 18-20th January 2006

DOUBLE PASS ON THE GRATING   prism box (multi slits) 2nd pass 1st pass

MSDP SPECTRA Each channel corresponds to a narrow band filter, with a variation of the wavelenth inside the channel in the direction opposite to the dispersion (Pic, box 9 and 11 channel, invern=0) or in the same direction (THEMIS, 2 boxes 8 channel, invern=1) CHANNELCHANNEL aile Line core Dispersion Line wing

MSDP OBSERVATIONS OBSERVED SPECTRA FIELD STOP ( F.S.) FLAT FIELD ( F.F.) DARK CURRENT ( D.C.) i j STEP_X STEP_Y x y

RESULT : LINE PROFILE IN EACH PIXEL OF THE FIELD OF VIEW Example on a very small fraction of the field of view profile for one pixel of the field

DETERMINATION OF INTENSITY AND VELOCITY FLUCTATIONS Average profile  II Vr= c  / Chord

RESULT: VELOCITY FIELD FOR DIFFERENT CHORDS INTENSITY CONTINUUM INTENSITY 288 mA INTENSITY 144 mA DOPPLER VELOCITY 288 mA DOPPLER VELOCITY 144 mA

INTENSITY CONTINUUM INTENSITY 144 mA B // DOPPLER VELOCITY 144 mA RESULT: INTENSITY, VELOCITY FIELD AND MAGNETIC FIELD