研究目的
To present a data reduction method that restores the spatial resolution of the spectra to their undegraded state by using a strictly synchronized, broadband slit-jaw camera to estimate the point spread function (PSF) that spatially degraded the spectra.
研究成果
The developed image restoration method for the restoration of ground-based spectral data over a large field of view builds on the PSF information recovered by the MOMFBD code and typically reaches a spatial resolution comparable to that of the broadband slit-jaw images used to recover the PSF.
研究不足
The method assumes that the PSF is the same for all wavelengths under consideration and that the width of the slit is negligible compared to the spatial structure in the data. The spatial variation of the PSF introduces new problems that require special consideration.
1：Experimental Design and Method Selection:
The method assumes the PSF estimated from a slit-jaw camera is the same as the PSF that degraded the spectra. It uses this PSF to quantify the linear combination of undegraded spectra in each degraded data point.
2：Sample Selection and Data Sources:
The data were recorded with two large-format Jai SP20000 CMOS cameras at the Swedish Solar Telescope (SST), observing the region of 6297?6304 ?.
3：List of Experimental Equipment and Materials:
Two large-format Jai SP20000 CMOS cameras, a slit-jaw camera viewing the slit plate through a 1:1 telecentric re-imager at a wavelength of 6302 ± 4.4 ?, and two neutral density (ND) filters.
4：4 ?, and two neutral density (ND) filters.
Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: Both cameras were windowed down to a region of 2500 × 1100 pixels to achieve a frame rate of 100 fps, with an exposure time of about 10 ms. The spectral camera was aligned with the x-axis parallel to the slit, and the slit-jaw camera was aligned as carefully as possible with the x-axis parallel to the slit.
5：Data Analysis Methods:
The data was first corrected for dark current and multiplied with a gain correction table. The slit-jaw frames were then organized in bursts of 500 frames and reduced using the MOMFBD code.
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