Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....2522v&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #2522
Astronomy and Astrophysics
Astrophysics
Scientific paper
The high sensitivity provided by SOFIA (Stratospheric Observatory For Infrared Astronomy) and the spectral resolution obtained with the CTS (Chirp Transform Spectrometer) combine in a unique tool in order to address a wide range of topics of modern astrophysics, from questions about comets, planetary atmospheres and the interstellar medium in the galaxy to investigations related to the early Universe. Thanks to high resolution spectroscopy we can obtain atmospheric information from the shape of a spectral line, and with this retrieve the altitude distribution of molecular species, for instance water vapor on Mars and HCl on Venus. Most of the cometary radiation is in the infrared range, as their equilibrium temperature is rather low. But since most of this radiation is absorved in our atmosphere, an observatory located at 12 Km will improve our spectroscopic capabilities in cometary bodies. These scientific demands represent also new scientific challenges in the spectrometers and receivers field. The use of digital technologies to simulate a matched expanded chirp signal and the mathematical modeling of electrical devices, allows us to achieve high resolution and dynamic range.
Hartogh Paul
Jarchow Ch.
Villanueva Geronimo
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