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Eis40June...nobody
Eis40June

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Difference between version and

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[{ALLOW view jsun,ms2,DaveWilliams,LouiseHarra}]
[{ALLOW edit jsun,ms2,DaveWilliams,LouiseHarra}]
[{ALLOW edit EISMainUsers}]
[{ALLOW view Anonymous}]
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''40" slot, 15 scans, time duration: roughly 6 minutes''
''40" slot, 15 scans, time duration: roughly 3 minutes''
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[click here to see EIS data list | https://vsolar.mssl.ucl.ac.uk/SolarB/ThumbsConn_js2.jsp?startdate=2008-01-07+00%3A52&enddate=2008-01-08+00%3A52&Instrument=Thumbnail&Instrument=Movie&Submit=Submit+entry]
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''1" fitted velocity and the deconvolution velocity (side by side)''
[{Image src='images/eis40/eis1scan_vs_40scan_recon_vel_FOV.png'}]
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* Due to having only two projections (order_0 & 1 images), the deconvolution is not good enough to reveal small or changed-rapidly structures. But considering 1" scanning usually takes long time to finish (in this case, 80 minutes for a small FOV), it is also not good enough to observe fast-changing features. So it looks the slot deconvolution will be useful for, at leat, synoptic review(?)
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* Due to having only two projections (order_0 & 1 images), the deconvolution is not good enough to reveal small or changed-rapidly structures. But considering 1" scanning usually takes long time to finish (in this case, 80 minutes for a small FOV), it is also not good enough to observe fast-changing features. So it looks the slot deconvolution would be useful for, for example, synoptic velocity review(?)
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- Instrument response is different, eg, PSF
- Instrument response is different, eg, response fuctions & PSF
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- Spectral resolution is different, eg, TRACE covers wider for FeXII 195 line compared with EIS 195 line (according to drw)
- Spectral resolution is different, eg, TRACE covers wider range for FeXII 195 line compared with EIS 195 line (according to drw)
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- images from TRACE & EIS may have different distortions and alias, which makes alignment difficult
- images from TRACE & EIS may have different distortions and alias, which makes alignment difficulties
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* If shifts order-plus images a few pixels along X-axis prior to deconvolution procedure, the reconstructed velocity maps will have slightly differences compared with no X shifts result:
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''Full FOV deconvolution: X shifts are -3, -2, -1, 0, 1, 2, 3 pixels from left to right and top to bottom''
[{Image src='images/eis40/vel_iter_3pix.png'}]
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''Small FOV deconvolution: X shifts are -3, -2, -1, 0, 1, 2, 3 pixels from left to right and top to bottom''
[{Image src='images/eis40/vel_iter_3pix_FOV.png'}]
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EIS study 235 – PRY_slot_context for large slot context
__Details__:
40” slot, 14 scans, spectral window width: 48pix, Y-height: 512pixs\\
exposure time: 10s, duration: 3m6s, 15 lines\\
Data obtained on 07-Jan-2008, 5 fits files\\
TRACE 195A data is used as order-0 image: tri20080107.0600
__Details__:
FeXII 195A line, 1K by 1K size, 29 frames\\
processed by standard TRACE routines\\
[{Image src='images/eis40/eis_trace_flist.png'}]
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TRACE movie from tri200807107.0600 (Red color-table, log scale applied)
[click here | https://vsolar.mssl.ucl.ac.uk/eiswiki/images/eis40/trace20080107.0600.mov]
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EIS intensity and reconstructed velocity movie (Red color-table, log scale applied)\\
5 frames, time range: 07-Jan-2008 06:16 ~ 06:28
[click here | https://vsolar.mssl.ucl.ac.uk/eiswiki/images/eis40/eis_int_vel_v0_log.mov]
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For your information:
[Ignacio Ugarte-Urra: using 40" slot to do plasma diagnostics: electron density and DEM analysis|https://vsolar.mssl.ucl.ac.uk/eiswiki/Wiki.jsp?page=SlotDiagnostics]
This page (revision-17) was last changed on 18-Apr-2021 19:06 by JianSunTop