An instrument to measure the solar spectrum from 170 to 3200 nm on board Spacelab

This instrument, at the present time in development, will fly on board Spacelab I in May 1983. Other flights are foreseen during the following missions. This instrument is composed by three double monochromators covering the range 170 to 3200 nm. The spectrometers have band-passes of 1 nm up to 900 nm and 20 nm from 850 to 3200 nm with an accuracy 10^–2 nm. Calibration lamps are included in the instrument to monitor any change of its sensitivity and wavelength scale.Proceedings of the 14th ESLAB Symposium on Physics of Solar Variations, 16–19 September 1980, Scheveningen, The Netherlands.Institut d'Aéronomie Spatiale de Belgique, 3, avenue Circulaire-B1180 Bruxelles, Belgique.Landessternwarte-Koenigstuhl, D6900 Heidelberg, F.R.G.Hamburger Sternwarte, Gojenbergsweg, D2050 Hamburg 80, F.R.G.