Title
Effect Of Surface Scatter Upon The Mtf Of The Solar Ultra Violet Imager (Suvi) Telescope
Keywords
image degradation; modulation transfer function; MTF due to surface scatter; solar ultraviolet imager (SUVI); space weather monitoring
Abstract
The solar UV imager (SUVI) is an extreme ultraviolet instrument that will fly on the Geostationary Operational Environmental Satellite (GOES)-R and-S platforms, as part of NOAA's space weather monitoring fleet. It will provide important information on solar activity and the effects of the Sun on the earth and the near-earth environment. This instrument will image the full solar disc in 6 EUV wavebands between 303.8 Å and 93.9 Å. A generalized Cassegrain telescope configuration is employed where six mirror sectors utilize multilayer coatings optimized for the six wavelengths of interest. An aperture shutter is used to select the appropriate sector for observations at a particular wavelength. A thinned, back-illuminated CCD sensor with 21μm (2.5 arcsec) pixels resides in the telescope focal plane. The modulation transfer function (MTF) is usually considered to be the image quality criterion of choice for applications where fine detail in extended images needs to be specified or evaluated. However, the contractual image quality requirement was specified in terms of fractional ensquared energy for a variety of different wavelengths and square sizes. In this paper we will calculate and present MTF plots (as degraded by diffraction, geometrical aberrations, surface scatter effects and detector effects) for each of the SUVI wavelengths of interest. Surface scatter due to residual optical fabrication errors is a major factor limiting the performance at the shorter wavelengths, and the large detector size severely limits the performance at all SUVI wavelengths. © 2013 SPIE.
Publication Date
11-13-2013
Publication Title
Proceedings of SPIE - The International Society for Optical Engineering
Volume
8862
Number of Pages
-
Document Type
Article; Proceedings Paper
Personal Identifier
scopus
DOI Link
https://doi.org/10.1117/12.2026978
Copyright Status
Unknown
Socpus ID
84887239844 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/84887239844
STARS Citation
Harvey, James E. and Choi, Narak, "Effect Of Surface Scatter Upon The Mtf Of The Solar Ultra Violet Imager (Suvi) Telescope" (2013). Scopus Export 2010-2014. 6455.
https://stars.library.ucf.edu/scopus2010/6455