AN APPROXIMATE DATA-BASE OF H2O INFRARED LINES FOR HIGH-TEMPERATURE APPLICATIONS AT LOW-RESOLUTION - STATISTICAL NARROW-BAND MODEL PARAMETERS

An approximate spectroscopic H2O data base suitable for high temperatu re and a few tens cm(-1) spectral resolution applications has been dev eloped as an extrapolation of HITRAN92 and Flaud and Camy-Peyret bases for the spectral and temperature ranges 150-9000 cm(-1) and 300-2500 K, respectively. The energies of high rovibrational levels have been e xtrapolated by using analytical expressions derived from Tyuterev's Ha miltonian. The intensities of lines issued from the fundamental vibrat ional level and from high rotational levels have been extrapolated emp irically. The intensities of lines issued from other vibrational level s are calculated from the intensities of the corresponding lines issue d from the fundamental vibrational level by using the independent rigi d harmonic oscillator approach. Satisfactory agreement between line-by -line calculations based on the extended data base and experimental da ta is obtained. Statistical narrow-band model parameters have been adj usted using line-by-line calculations; they are available under reques t.