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Simulation with GEISA-03 (upper curve)

C2H2. GEISA/IASI EFFECTIVE USE. IASI on metop since October 19th 2006 Launch. HCN. C3H8. IASI level 1 cal/val activities GEISA/IASI used as the reference spectroscopic database Radiative Transfer Model (4A) will be used for validation Scott & Chédin, J.Appl.Met (1981); 4A-OP, NOVELTIS.

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Simulation with GEISA-03 (upper curve)

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  1. C2H2 GEISA/IASI EFFECTIVE USE IASI on metop since October 19th 2006 Launch HCN C3H8 IASI level 1 cal/val activities GEISA/IASI used as the reference spectroscopic database Radiative Transfer Model (4A) will be used for validation Scott & Chédin, J.Appl.Met (1981); 4A-OP, NOVELTIS HC15N HC3N NEW LINE LIST 720-760 cm-1 GEISA 03 line list CO2 C2H2 With GEISA-08 No C2HD HCN C3H8 HC3N C6H6 C2HD5 EVALUATION OF GEISA CONTENTS TITAN EARTH (CASSINI-HUYGENS 29/01/06) (MSG-2 25/01/06) EARTH and MetOp/IASI ( Infrared Atmospheric sounder Interferometer ) http://earth-sciences.cnes.fr/IASI/http://www.eumetsat.int 42 co-Authors -16 Laboratorise • The GEISA/IASI database is an extraction (spectral range 599-3001 cm-1) of theGEISA Spectroscopic database. • It has been developed and is maintained with the purpose of assessing the IASI measurements capabilities, in the frame of the EUMETSAT European Polar System (EPS) preparation, by simulating high resolution radiances and/or using experimental data. Assessment of GEISA contents through comparison with other public spectroscopic databases (IASI brightness temperature difference simulations) Impact of individual spectroscopic parameters evaluation (K) Simulation with GEISA-03 (upper curve) Impact of replacement of HITRAN-04 or MIPAS PF3.2 H2O data in GEISA-03(differences (K) in lower curves), with associated standard IASI noise at T=280 K. Air broadened half-widths evaluation Impact of replacement of HITRAN-04 or HITRAN-06 H2O air broadened half-widths in GEISA-03 Intensity evaluation Impact of replacement ofHITRAN-04 or HITRAN-06 H2O intensities in GEISA-03 TITAN and Cassini-Huygens/CIRS (Composite INfraRedSpectrometer) http://www.esa.int/SPECIALS/Cassini-Huygens/index.htlm Assessment of GEISA-08 edition updated molecular species* for CIRS obervation modelisations *Selected molecular species:CO2, C2H2, C2H6, HCN, HC3N, C4H2, C3H4, C2H4, C2HD, C6H6 Courtesy of A. Jolly DETECTION OF C2HD New molecule in GEISA-08 CIRS OBSERVATIONS MODELISATION Courtesy of A. Coustenis With GEISA-03 • References: • A. Jolly et al. « New infrared Intensities and extensive line list for the HC3N bending modes, J. Mol. Spectrosc. 242, 1, pp 46-54, March 07 • A. Coustenis et al. « Detection of C2H2 and D/H ratio on Titan. Icarus, in Press (2008) • A. Coustenis et al. Titan trace gaseous composition from CIRS: three years into the Cassini-Huygens mission. In preparation

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