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At line 70 changed one line
!! Discussions
!! Conlusions and Discussions
At line 72 added 27 lines
* The deconvolution results are fairly ok to show loops, outflows/downflows (ie. blue/red shifts) for large-scale features, for example, see positions A to H (except F).
[{Image src='images/eis40/recon_int_vel_gimp.png'}]
* For small-scale features, the reconstruction is not ok enough to show fine structures, for example, see position F on both images.
[{Image src='images/eis40/recon_int_vel_FOV_gimp.png'}]
* 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(?)
* A few issues during the deconvolution using __this datasets__ are caused by that the order-0 & 1 images come from different instruments: TRACE & EIS. The following factors are imported:
- CCD pixel size and resolution are different
- Instrument response is different, eg, PSF
- Spectral resolution is different, eg, TRACE covers wider for FeXII 195 line compared with EIS 195 line (according to drw)
- images from TRACE & EIS may have different distortions and alias, which makes alignment difficult
The above factors effect the image quality and thus alignment and reconstruction. However, the above factors can be reduced significantly if both order-0 & 1 images come from same instrument.
* The large FOV image is needed as it helps alignment. But the data of EIS 40" slot needs to process to get full FOV image, which effects image quality. So if possible, using wider slot (eg. 266" slot) is better
*
This page (revision-17) was last changed on 18-Apr-2021 19:06 by JianSunTop