This page (revision-9) was last changed on 27-Mar-2020 14:38 by Peter Young

This page was created on 24-Feb-2010 18:22 by PeterYoung

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NarrowWorksheet3
NarrowWorksheet3

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At line 1 added 2 lines
[{ALLOW edit EISMainUsers}]
[{ALLOW view Anonymous}]
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After calibrating the data with eis_prep we are now ready to read the data into IDL. First set the filename:
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{{{
filename=’eis_l1_20061209_113031.fits’
}}}
Following on from Worksheet 2, you can now read the EIS FITS file from the command line:
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(NOTE: you may need to add the path name, depending on where the file is located.)
Now to read the EIS FITS file from the command line, type:
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IDL> ycen=data->getxcen(/raster)
IDL> ycen=data->getycen(/raster)
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!Exercise
!Exercises
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#Using eis_get_wininfo and the getvar() object method, extract an image in Fe XII 195 by summing all wavelength pixels in the window. Plot the image. What do you have to do to the image to orient it correctly? (You may need to refer to XRT images from Day 1 of the workshop.)
#Using the following commands:
For these exercises you will need to refer to the [EIS object methods page|EISmethods].
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#Create and plot an IDL map for the Fe XII 195.12 line by taking the moments of the line.
#Now use the getvar() method to extract the 195.12 wavelength window. Sum the 3D window over the wavelength direction (use the IDL total() routine), and plot the resulting image. How does it compare to the map image plotted above? See the object methods page for why it is different.
#Using the following commands, can you work out the direction that EIS rasters? (east-west, or west-east)
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IDL> aux_data=data->getaux_data()
IDL> exptimes=data->sec_from_obs_start(*(aux_data.ti_1))
IDL> ti=data->getti_1()
IDL> sec=data->sec_from_obs_start(ti)
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work out in which direction EIS rasters (east-west, or west-east).
This page (revision-9) was last changed on 27-Mar-2020 14:38 by Peter YoungTop