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Proceedings Paper

Efficiency variations of UVCS/SOHO based on laboratory measurements of replica gratings
Author(s): Larry D. Gardner; Nigel Atkins; Silvano Fineschi; Peter L. Smith; John L. Kohl; L. Maccari; Marco Romoli
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Paper Abstract

We have carried out measurements of efficiency as functions of position across the surfaces of replica grating made from the same masters as the UVCS/SOHO flight units. Variations in first order efficiency which significantly affect the interpretation of UVCS data are found along the direction perpendicular to the grooves. Variations are also found along the direction parallel to the grooves, but these do not seriously affect UVCS data interpretation. The measurements and their application to the radiometric calibration of UVCS/SOHO are discussed.

Paper Details

Date Published: 18 December 2000
PDF: 8 pages
Proc. SPIE 4139, Instrumentation for UV/EUV Astronomy and Solar Missions, (18 December 2000); doi: 10.1117/12.410542
Show Author Affiliations
Larry D. Gardner, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Nigel Atkins, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Silvano Fineschi, Harvard-Smithsonian Ctr. for Astrophysics (Italy)
Peter L. Smith, Harvard-Smithsonian Ctr. for Astrophysics (United States)
John L. Kohl, Harvard-Smithsonian Ctr. for Astrophysics (United States)
L. Maccari, Univ. degli Studi di Firenze (Italy)
Marco Romoli, Univ. degli Studi di Firenze (Italy)


Published in SPIE Proceedings Vol. 4139:
Instrumentation for UV/EUV Astronomy and Solar Missions
Silvano Fineschi; Clarence M. Korendyke; Oswald H. W. Siegmund; Bruce E. Woodgate, Editor(s)

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