The instrument design is complete and many components and subsystems have been manufactured and tested. Solar-blind, multichannel, pulse counting detectors for two ultraviolet spectral bands have been developed and satisfactory flight units have been chosen. A large, lightweight graphite-epoxy optical bench, utilizing fingerplate joints with no metallic parts in order to minimize thermal expansion, has been built. Tests of the engineering model torque-motor-driven grating carrousel in that this critical system exceeds our tight specifications for accurate and repeatable angular positioning. A complement of large, high-frequency gratings and an echelle is being completed in several laboratories. Software resident in a computer on the spacecraft will control the spectrograph with the capability to alter procedures in response to real-time evaluation of the data.

Date Published: 9 November 1981
PDF: 12 pages
Proc. SPIE 0279, Ultraviolet and Vacuum Ultraviolet Systems, (9 November 1981); doi: 10.1117/12.965722

Published in SPIE Proceedings Vol. 0279:
Ultraviolet and Vacuum Ultraviolet Systems
William R. Hunter, Editor(s)