Parallelization and Algorithmic Enhancements of High Resolution IRAS Image Construction
Abstract
The Infrared Astronomical Satellite carried out a nearly complete survey of the infrared sky, and the survey data are important for the study of many astrophysical phenomena. However, many data sets at other wavelengths have higher resolutions than that of the coadded IRAS maps, and high-resolution IRAS images are strongly desired both for their own information content and their usefulness in correlation studies. The HIRES program was developed by the Infrared Processing and Analysis Center (IPAC) to produce high-resolution (~ 1') images from IRAS data using the maximum correlation method (MCM). We describe the port of HIRES to the Intel Paragon, a massively parallel supercomputer, other software developments for mass production of HIRES images, and the IRAS Galaxy Atlas, a project to map the Galactic plane at 60 and 100 µm. Images produced from the MCM algorithm sometimes suffer from visible striping and ringing artifacts. Correcting detector gain offsets and using a Burg entropy metric in the reconstruction scheme were found to be effective in suppressing these artifacts. A variation of the destriping algorithm was used to subtract zodiacal emission.
Additional Information
© 1996 The University of Chicago Press. Provided by the NASA Astrophysics Data System. Received 1995 December 14; accepted 1996 March 22. We thank Tom Soifer, Joe Mazzarella, and Jason Surace for their involvement and helpful suggestions during the project. We are grateful to George Aumann, John Fowler, and Michael Melnyk for developing the original HIRES program, especially John Fowler who helped with the port of HIRES to the Intel computers by explaining the structure and details of the program, and provided advice throughout the algorithmic developments. Thanks are also due to Ron Beck and Diane Engler who handled numerous HIRES processing requests and are running the IRAS Galaxy Atlas production. This research was supported from the NASA Astrophysics Data Program under Contract No. NAS5-32642, and was performed in part using the Intel Touchstone Delta and the Intel Paragon operated by Caltech on behalf of the Concurrent Supercomputing Consortium.Attached Files
Published - 1996-13.pdf
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Additional details
- Eprint ID
- 46829
- Resolver ID
- CaltechAUTHORS:20140703-213811291
- NAS5-32642
- NASA
- Created
-
2014-07-10Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field
- Caltech groups
- Space Radiation Laboratory, Infrared Processing and Analysis Center (IPAC)
- Other Numbering System Name
- Space Radiation Laboratory
- Other Numbering System Identifier
- 1996-13