Hadamard-transform spectrometry of the atmospheres of Earth and jupiter.
A Hadamard-transform spectrometer has been used to obtain a spectrum of Jupiter from 880 cm(-1) to 770cm(-1) Three ammonia absorption features stand out at 870 cm(-1), 851 cm(-1), and 833 cm(-1). The general shape of the spectrum implies an atmosphere with a monotonically decreasing temperature profile up to the 125 K level. In addition, transmission profiles of the earth's atmosphere were taken between 16 microm and 25 microm for five consecutive nights under varying amounts of atmospheric water and air mass. There are many saturated lines, but nightly variations are constant and agree well with a theoretical profile. These results show that the Hadamard-transform technique is a useful method for obtaining astronomical spectra.
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Phillips
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Briotta