This page (revision-57) was last changed on 07-Dec-2016 14:14 by David R Williams

This page was created on 09-Jul-2008 07:16 by David R Williams

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EisXstudy
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At line 106 changed one line
EIS has two modes of raster. The first is ''scanning'' raster, which is what we see in this example. EIS takes a restricted-field image of the Sun and then disperses it, perpendicular to the length of the slit. Then, a fine mirror (FMIR) adjusts the X position on the Sun where that image comes from (by the amount indicated in ''FM Step size'') and makes another image.
EIS has two modes of raster. The first is ''scanning'' raster, which is what we see in this example. EIS takes a restricted-field image of the Sun and then disperses it, perpendicular to the length of the slit. Then, a fine mirror (FMIR) adjusts the X position on the Sun where that image comes from (by the amount indicated in ''FM Step size'') and makes another image. This is how EIS builds up [spectroheliograms|http://en.wiktionary.org/wiki/spectroheliogram] (spectral image of the Sun).
At line 108 changed one line
The second mode is the so-called ''fixed slit'' or ''sit'n'stare'' raster type, whereby the
The second mode is the so-called ''fixed slit'' or ''sit'n'stare'' raster type, whereby the same slit or slot-size portion of the Sun is repeatedly made into an image and dispersed. This is qualitatively the same as the scanning raster, except for the fact that we are usually more interested in the time-dependent changes at a particular location.
This page (revision-57) was last changed on 07-Dec-2016 14:14 by David R WilliamsTop