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ORFEUS-SPAS - The Berkeley EUV spectrometerThe Berkeley EUV spectrometer of ORFEUS-SPAS, a joint project of NASA and the BMFT, incorporates a set of four novel spherically figured, varied line-space gratings used in a geometry that is similar to that of the classic Rowland mount to span an interval of 390 and 1200 A. Two spectral detector units containing curved microchannel plates and delay-line anodes encode the arriving photons in digital format for telemetry. An additional optic directs the image of the source in the entrance aperture onto a sealed FUV detector which is used to track the source as it drifts during an observation, enabling a postflight reconstruction of the spacecraft pointing vector. This in turn makes it possible to define with precision the wavelength of each recorded photon.
Document ID
19930039443
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Bowyer, Stuart
(NASA Headquarters Washington, DC United States)
Hurwitz, Mark
(California Univ. Berkeley, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1990
Publication Information
Publication: In: Observatories in earth orbit and beyond (A93-23401 07-89)
Publisher: Kluwer Academic Publishers
Subject Category
Spacecraft Instrumentation
Accession Number
93A23440
Funding Number(s)
CONTRACT_GRANT: NGR-05-003-450
Distribution Limits
Public
Copyright
Other

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