This page (revision-7) was last changed on 07-Dec-2016 14:14 by Terje Fredvik

This page was created on 14-Jun-2010 15:59 by PeterYoung

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HKmethod
HKmethod

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[{ALLOW edit EISMainUsers}]
[{ALLOW view Anonymous}]
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The wavelength correction can be found using {{eis_wave_corr_hk.pro}}, the {{gethkwavecorr()}} method of the eis_data object or eis_prep.pro. All procedures use specially prepared house keeping data files that are distributed with SolarSoft in the directory {{$EIS_DATA/wave_corr}}. If the house keeping files that are needed for correcting a certain EIS raster are missing in your SolarSoft installation, the new routines will search for the files in {{$EIS_WAVE_CORR_HK_DATA}} (if this environment variable is set), and in the current working directory. If the files are not found, they will automatically be downloaded from the Oslo archive and saved in {{$EIS_WAVE_CORR_HK_DATA}} (if set) or to the current working directory (if not set).
The wavelength correction can be found using {{eis_wave_corr_hk.pro}}, the {{gethkwavecorr()}} method of the eis_data object or eis_prep.pro. All procedures use specially prepared house keeping data files that are distributed with SolarSoft in the directory {{$EIS_DATA/wave_corr}}. If the house keeping files that are needed for correcting a certain EIS raster are missing in your SolarSoft installation, the new routines will search for the files in {{$EIS_WAVE_CORR_HK_DATA}} (if this environment variable is set), and in the current working directory. If the files are not found, or if newer versions of the files exist in the Oslo archive, they will automatically be downloaded and saved in {{$EIS_WAVE_CORR_HK_DATA}} (if set) or to the current working directory (if not set). Note that the house keeping files for a specific month are updated every night on the Oslo servers until the month is passed, i.e. if you work with observations from the current month new house keeping files will be downloaded to your machine every day until the end of the month.
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The following three examples demonstrate different methods to obtain the new wavelength correction. The example data-set is specified through
{{{
IDL> paths = '~/hinodedata/eis/mission/2007/12/11/eis_l0_20071211_162413.fits.gz'
}}}
(please modify the path to the location where your Hinode data are stored) and the data-file can be obtained [here|http://tinyurl.com/wavecorr-example].
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IDL> paths = '~/hinodedata/eis/mission/2007/12/11/eis_l0_20071211_162413.fits.gz' ; This file can be downloaded here
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* wvl_cube: If set to a named variable, wvl_cube will return a 3 dimensional wavelength cube in the format used by mk_analysis.pro of the Component Fitting System for IDL (cfit) package.
* wvl_cube: If set to a named variable, wvl_cube will return a 3 dimensional wavelength cube in the format used by [mk_analysis.pro|http://www.astro.washington.edu/docs/idl/cgi-bin/getpro/library32.html?MK_ANALYSIS] of the [Component Fitting System for IDL (cfit)|http://solar.bnsc.rl.ac.uk/swnotes/cds_swnote_47.pdf] package.
This page (revision-7) was last changed on 07-Dec-2016 14:14 by Terje FredvikTop