Theoretical Studies of Spectroscopic Line Mixing in Remote Sensing Applications with Theoretical Support to Improve the Accuracy of the HITRAN H2O Database

HITRAN(高分辨率传输)分子吸收数据库目前包含约47个不同分子物种(https://www.cfa.harvard.edu/hitran/)的约740万条谱线，因此，加上适当的计算机代码，它可用于准确计算地球(和其他行星)大气中光的光谱性质(传输和发射)。HITRAN数据库被数千名科学家和工程师广泛使用，解决了大量的科学问题和兴趣。该项目有两个既定的目标，即：(1)继续研究对遥感和光谱学具有重要意义的分子的线混合的理论和计算处理，以及(2)为提高HITRAN数据库的准确性，特别是H2O线型的计算提供理论支持。第一个目标是在以前NSF支持的基础上，发展一种能够研究分子吸收体和分子微扰体之间相互作用的线混合的形式。第二个目标是继续努力提高光谱数据库，特别是HITRAN和相关汇编中H2O线型光谱参数的准确性。

The HITRAN (high-resolution transmission) molecular absorption database currently contains some 7.4 million spectral lines of some 47 different molecular species (https://www.cfa.harvard.edu/hitran/ ) As such, along with appropriate computer codes, it can be used to accurately calculate the spectroscopic properties (transmission and emission) of light in the terrestrial (and other planetary) atmospheres. The HITRAN database is widely used by thousands of scientists and engineers, tackling a large range of scientific problems and interests. This project has two stated objectives namely : (1) continuing studying theoretical and computational treatment of line mixing for molecules that are important in remote sensing and spectroscopy, and , (2) providing theoretical support for improving the accuracy of the HITRAN database, in particular calculation of H2O lineshapes. The first objective is based on prior NSF support to develop a formalism capable of studying line mixing from interactions between a molecular absorber and molecular perturbers. The second objective represents continuing effort to improve the accuracy of spectroscopic parameters of H2O lineshapes in spectral databases, specifically HITRAN, and related compilations.