| Issue |
A&A
Volume 412, Number 3, December IV 2003
|
|
|---|---|---|
| Page(s) | 893 - 896 | |
| Section | Astronomical instrumentation | |
| DOI | https://doi.org/10.1051/0004-6361:20031514 | |
| Published online | 08 December 2003 | |
Restoration of solar images by the Steer algorithm*
National Space Development Agency of Japan, 2-1-1, Sengen, Tsukuba, Ibaraki 305-8505, Japan
Corresponding author: koshiishi.hideki@nasda.go.jp
Received:
23
July
2002
Accepted:
5
August
2003
Restoration of diffuse features and computational time have been more serious problems in solar observations than in non-solar observations because of complicated brightness structures in enormous time-series images. The CLEAN algorithm proposed by Steer et al. was applied to the data processing of the Nobeyama Radioheliograph to solve these problems, and restores daily solar images well in an automatic data processing routine. A single set of parameters used in the algorithm can cover a wide range of solar activity. The algorithm also has the advantage of requiring less computational time and is optimized to require one-tenth the time of the classical Högbom algorithm.
Key words: instrumentation: interferometers / techniques: image processing / Sun: radio radiation
© ESO, 2003
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