The SWAP Filter: A Simple Azimuthally Varying Radial Filter for Wide-Field EUV Solar Images
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Published:2023-07
Issue:7
Volume:298
Page:
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ISSN:0038-0938
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Container-title:Solar Physics
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language:en
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Short-container-title:Sol Phys
Author:
Seaton Daniel B.ORCID, Berghmans DavidORCID, Bloomfield D. ShaunORCID, De Groof AnikORCID, D’Huys ElkeORCID, Nicula BogdanORCID, Rachmeler Laurel A.ORCID, West Matthew J.ORCID
Abstract
AbstractWe present the SWAP Filter: an azimuthally varying, radial normalizing filter specifically developed for EUV images of the solar corona, named for the Sun Watcher with Active Pixels and Image Processing (SWAP) instrument on the Project for On-Board Autonomy 2 (PROBA2) spacecraft. We discuss the origins of our technique, its implementation and key user-configurable parameters, and highlight its effects on data via a series of examples. We discuss the filter’s strengths in a data environment in which wide field-of-view observations that specifically target the low signal-to-noise middle corona are newly available and expected to grow in the coming years.
Funder
National Aeronautics and Space Administration
Publisher
Springer Science and Business Media LLC
Subject
Space and Planetary Science,Astronomy and Astrophysics
Reference39 articles.
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