Abstract image available at: http://adsabs.harvard.edu/abs/1975A&A....38..405D

Abstract image available at: http://adsabs.harvard.edu/abs/1975A&A....38..397D

The paper describes some results and methods of work on the submillimeter spectrum and its application to atmospheric and astrophysical problems. The paper begins with descriptions of the spectroscopic techniques evolved and used, which provide spectral resolution more than half an order of magnitude finer than previously available, particularly at

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The measurements reported were made during a flight to an altitude of 40 km, on Mar. 13, 1974. A polarizing Michelson interferometer cooled, by a liquid helium bath, to a temperature of 1.4 K was used in the measurements. One hour of useful time was achieved at float altitude. The fitted spectrum obtained is shown in a graph. The measured spectrum

The spectroscopic determinations of the solar magnetic fields are based on the Zeeman effect observed in relation to a number of absorption lines of the solar spectrum. It is attempted to deduce indirectly certain characteristics of the magnetic field in a sunspot, giving attention to morphological aspects and the magnetic polarities. The results