New HXT Image Synthesis Program
May, 1998
Dear colleagues,
We would like to announce that a new set of HXT modulation pattern parameters,
together with an improved HXT image synthesis program with the Maximum Entropy
Method (MEM), are now available and are open for Yohkoh data users.
The new parameters have been established via on-board calibration of HXT by
Dr. Jun Sato as part of his Ph.D. thesis study. During the course of this
calibration, significant improvement of the MEM image synthesis program has
also been achieved. The combination of the parameters and program enables us
to obtain HXT images with considerably higher image quality than those with
the previous ones. Details of the calibration and the resultant improvement
of HXT images will soon be reported in a journal paper.
The new modulation pattern parameters and the program are now on-line at
ISAS workstations. They should also be on-line at your own institute soon,
provided that your institute regularly copies Yohkoh software package from
ISAS. In case you may want to use the new HXT program before it is copied
from ISAS, we have prepared a `tar-ed'-then-`gzip-ped' file nmovie.tar.gz.
The file is located in a Web page:
http://solar.nro.nao.ac.jp/~hxthome/newtool/
Please note that at this moment, the program can only be run on SUN
workstations. Platform-independent IDL version of the program, which is most
likely HXT_MULTIMG, will be available soon. Dr. J. McTiernan of UCB has kindly
agreed to take part in preparing the IDL version.
The tar file nmovie.tar.gz contains a total of 14 files which are classified
into the following three categories:
(1) HXT image synthesis program; executable binary (SUN only) and the Fortran
source code.
(2) HXT modulation pattern parameters.
(3) A set of IDL programs for extracting HXT count data for image synthesis
and displaying the resultant images (i.e., serve as user interface).
The files contained in nmovie.tar.gz is listed in the table below. We
recommend that the extracted files be located in the directories shown in the
table. After placing the files to appropriate directories and running the
YODAT program to extract HXT count data from HDA files, the following IDL
command
IDL> .run HXTPRO_NMP
will provide an HXT image with the new set of modulation patterns.
-----------------------------------------------------------------------------
File Name Description Suggested directory
-----------------------------------------------------------------------------
(1)
nmovie_s SUN-executable binary $DIR_HXT_EXE
nmovie.f Fortran source code $ys/ucon/idl/sato
-----------------------------------------------------------------------------
(2)
npara.dat Modulation pattern params. $DIR_HXT_CAL
-----------------------------------------------------------------------------
(3)
hxtpro_nmp.pro IDL program $ys/ucon/idl/sakao
wrt_hxtmve_jcl3.pro IDL program $ys/ucon/idl/sato
cnv_hdrstr.pro IDL program $ys/ucon/idl/sakao
cnv_infstr.pro IDL program $ys/ucon/idl/sakao
make_timstr.pro IDL program $ys/ucon/idl/sakao
disp_hxtimg.pro IDL program $ys/ucon/idl/sakao
plot_cinema_hdr.pro IDL program $ys/ucon/idl/sakao
plot_cinema2.pro IDL program $ys/ucon/idl/sakao
hxt_hs_task.pro IDL program $ys/ucon/idl/sakao
hxt_hs_data.pro IDL program $ys/ucon/idl/sakao
fort2hxi.pro IDL program $ys/hxt/idl/atest
-----------------------------------------------------------------------------
Any questions and/or comments are welcome. They should be addressed to:
sato@nro.nao.ac.jp
with CC's to kosugi@laputa.mtk.nao.ac.jp and sakao@spot.mtk.nao.ac.jp.
We hope that the release of the new HXT image synthesis software package will
encourage further analyses on HXT data and, at the same time, increase the
number of HXT data users.
With best regards,
Jun Sato, Takeo Kosugi, and Taro Sakao
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