Acousto-Optical Spectrometers in Space
R. Schieder, J. Horn, O. Siebertz, M. Klumb
J. Frerick
V. Tolls
Proc. 30th ESLAB Synposium, "Submillimetre and Far-Infrared Space Instrumentation",
24-26 Sep. 1996, ESTEC, Noordwijk, The Netherlands, ESA SP-388 (1996)
Abstract:
Recent developments of acousto-optical spectrometers (AOS) are
discussed. Some details of the performance of the space-qualified
AOS for the Submillimeter Wave Astronomy Satellite are presented.
A newly developed array-AOS with four 1 GHz bands in one unit is
described. Results from Allan variance tests, molecular gas cell
tests, and investigations of the relative stability between the
four bands are presented. The Allan variance minimum time is found
at more than 1000 seconds which is one of the best results seen
with broadband AOSs. The relative stability of the bands is very
high so that methods like "flat-fielding" can be applied to the
measured spectra.
Keywords: Radioastronomy; Spectrometers; Radiometers; Heterodyne
Instrumentation