Flat field of UVCS detectors for early part of SOHO mission

Mario L. Cosmo; Peter L. Smith; Nigel Atkins; R. M. Suleiman; Larry D. Gardner; John L. Kohl

doi:10.1117/12.371094

25 November 1999 Flat field of UVCS detectors for early part of SOHO mission

Mario L. Cosmo, Peter L. Smith, Nigel Atkins, R. M. Suleiman, Larry D. Gardner, John L. Kohl

Proceedings Volume 3764, Ultraviolet and X-Ray Detection, Spectroscopy, and Polarimetry III; (1999) https://doi.org/10.1117/12.371094
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

The Ultraviolet Coronagraph Spectrometer (UVCS) on the Solar and Heliospheric Observatory (SOHO) comprises two telescopes and two spectrometer channels for spatially resolved ultraviolet spectral diagnostics of the solar corona. The principal lines for which the two channels are optimized are the H I 'Lyman-(alpha) ' line at 121.5 nm and the O VI (O⁵⁺) doublet at 103.2 and 103.7 nm. An 'in-flight' method, using observations of stars and scattered solar disk light, has been devised to determine the flat field function, i.e., the relative detection efficiency of the detector pixels. We present the details and results of this process. Local pixel-to-pixel efficiency variation is found to be, typically, about plus or minus 9% to plus or minus 17% (1 (sigma) ) for the H I Lyman-(alpha) channel and plus or minus 9% for the O VI channel.

Citation Download Citation

Mario L. Cosmo, Peter L. Smith, Nigel Atkins, R. M. Suleiman, Larry D. Gardner, and John L. Kohl "Flat field of UVCS detectors for early part of SOHO mission", Proc. SPIE 3764, Ultraviolet and X-Ray Detection, Spectroscopy, and Polarimetry III, (25 November 1999); https://doi.org/10.1117/12.371094

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available