In this paper, we will make a review of the status of the HNO 3 line parameters. Using new and accurate experimental results concerning the spectroscopic properties of the HNO 3 molecule in term of line positions, line intensities and line air-broadening parameters as well as improved theoretical methods it has been possible to generate an improved set of line parameters for this molecule both in the broadband spectral region covered by the MIPAS (Michelson Interferometer for Passive Atmospheric Sounding) instrument operating on EnviSAT and in the far infrared spectral region. The validation of satellite measurements like MIPAS is aimed at identifying possible systematic errors. In order to identify those which are due to the spectroscopic pa- rameters, it is required to perform retrievals using a different instrument operating in a di’erent spectral region. Therefore HNO 3 profiles measured at 11 ?m by MIPAS were validated with the IBEX (Infrared Balloon EXperiment) measurements performed in the far infrared region. An agreement of ñ5% is obtained between the profiles achieved by these two instruments after significant upgradings of the spectroscopic databases in both spectral regions. We will describe the updates will have been performed recently since the previous 2004 version of HITRAN. Also some spectral regions need to be improved (in terms of line positions and line intensities), and we will recommend further studies

{"references": ["None given"]}