MH15		10min5:39

A. VALENTIN, F. RACHET, Universite de Pierre et Marie Curie, 75005 Paris, France; A. BYKOV, N. LAVRENT'EVA, V. SAVEL'EV, L. SINITSA AND A. SOLODOV, Institute of Atmospheric Optics, Tomsk, 634055 Russia.

Water vapor lineshifts induced by nitrogen pressure have been measured at NIST (USA) and LPMA (France) using Fourier-spectrometers with a multi-pass absorption cells of 32 and 84 meters at 0.0025 and 0.01 cm^-1 resolution in 1850 -- 2230 cm^-1 and 4900 -- 5600 cm^-1 spectral region. The special procedure have been used to minimize errors connected with the assymetry of the contours due to apparatus effects in high pressure FTS--spectra.

The fitting of Voigt contour parameters was used to obtain lineshift parameters. Accuracy of lineshift coefficient determination was better than 1 mk/atm. The lineshift coefficients have been determined for well resolved isolated lines belonging to 010--000 and 011--000 bands with high quantum numbers J up to 18.

The lineshift coefficients have been calculated using the Anderson method and cut-of-free procedure. The dipole-quadrupole, quadrupole-quadrupole, dipole-hexadecapole and polarizational interactions were included in the calculations.

The contributions of different type of intermolecular potentials and their dependences on J value will be discussed.