Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf..437v&link_type=abstract
SF2A-2006: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: D. Barret, F. Casoli, G.
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present an analysis of two sets of Titan limb spectra recorded by the Composite Infrared Spectrometer (CIRS) aboard Cassini between 100 and 1400 cm-1. The first set of spectra was recorded near the equator (15°S) and the second set near the north pole (80°N). The geometry of limb observations allows the retrieval of vertically-resolved information on temperature and abundance of compounds displaying a good signal-to-noise ratio such as C2H2, C2H6, C4H2, CH3C2H, C3H8, C2H4, C6H6, HCN, HC3N and CO2. At 15°S, the limb spectra probe the 250-460 km range, and by using a set of nadir spectra acquired at 10°S, we were able to retrieve profiles at lower levels in the range 150-250 km. At 80°N, vertical profiles were retrieved between 170 and 500 km using limb spectra only.
Emission intensities of molecular bands depend on both temperature and abundance profiles. Temperature was deduced from the emission of the ν4 methane band centered at 1305 cm-1 (7.7 μm), using an inversion algorithm of the radiative transfer equation combining both nadir and limb spectra. The retrieved thermal profiles were then used to model the observed spectra in the range 600-1000 cm-1. An inversion algorithm combining both nadir and limb spectra permits the retrieval of the vertical mixing ratio profile of molecules mentioned above. We present here the temperature profiles and the mixing ratio profiles obtained at the two latitudes and discuss the observed differences.
Bezard Bruno
Cirs Investigation Team
Vinatier Stéphane
No associations
LandOfFree
Comparison of temperature and abundance vertical profiles of Titan between the equator and the north pole as retrieved from Cassini/CIRS limb spectra does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Comparison of temperature and abundance vertical profiles of Titan between the equator and the north pole as retrieved from Cassini/CIRS limb spectra, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Comparison of temperature and abundance vertical profiles of Titan between the equator and the north pole as retrieved from Cassini/CIRS limb spectra will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1480708