Article (Scientific journals)
Straylight-Rejection Performance of the STEREO HI Instruments
Halain, Jean-Philippe; Rochus, Pierre; Defise, Jean-Marc et al.
2011In Solar Physics
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Keywords :
Straylight; Lens barrel rejection; Mean solar brightness; Off-pointing
Abstract :
[en] The SECCHI Heliospheric Imager (HI) instruments on-board the STEREO spacecraft have been collecting images of solar wind transients, including coronal mass ejections, as they propagate through the inner heliosphere since the beginning of 2007. The scientific use of the images depends critically on the performance of the instruments and its evolution over time. One of the most important factors affecting the performance of the instrument is the rejection of straylight from the Sun and from other bright objects located both within and outside the HI fields of view. This paper presents an analysis of the evolution of the straylight-rejection performance of the HI instrument on each of the two STEREO spacecraft over the three first years of the mission. The straylight level has been evaluated and expressed in mean solar brightness units, in which such scientific observations are usually quoted, using photometric conversion factors.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Halain, Jean-Philippe ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Rochus, Pierre  ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Defise, Jean-Marc ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Satellites, missions et instruments spatiaux
Mazy, Emmanuel ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Mazzoli, Alexandra  ;  Université de Liège - ULiège > CSL (Centre Spatial de Liège)
Language :
English
Title :
Straylight-Rejection Performance of the STEREO HI Instruments
Publication date :
July 2011
Journal title :
Solar Physics
ISSN :
0038-0938
Publisher :
Springer Science & Business Media B.V.
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 12 July 2011

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