The radial filter begins by summing the off-limb component of several images to increase
signal-to-noise. The corona beyond the disk is then divided into concentric rings, each
of which is scaled as a function of its radius, average brightness, and intensity relative
to neighboring rings. As such, flux is not conserved; the brightness of each pixel
corresponds only to its intensity relative to other pixels of the same radius.
A few things are required before you can use the software yourself. First, you'll need access to some AIA data locally. For information on
acquiring AIA data, visit the main AIA page hosted by LMSAL.
In addition to an
IDL software license, you'll
also need to have installed the SolarSoftWare library of IDL routines (sswidl);
visit the SSW documentation
pages for more info.
Two routines are required: <aia_rfilter.pro> and <aia_rfilter_jp2gen.pro>. Detailed instructions can be found
in the header of <aia_rfilter.pro>. Both programs are now part of the main AIA SSWIDL installation and should be
included in your installation if everything is up to date. Alternatively, you can download the latest versions here:
aia_rfilter.pro and aia_rfilter_jp2gen.pro
Please note that these programs are still being actively modified. If you've discovered a bug or have
any suggestions, please contact Patrick McCauley at firstname.lastname@example.org