Pressure-Broadening of the 22.2 GHz Line of Water: Basic Results for Remote Sensing of the Atmosphere
For atmospheric purposes, the self- and N2-broadening parameters of the J = 61,6 ← 52,3 (22.2 GHz) rotational transition of water has been investigated in the temperature range 296–338 K. This investigation should be considered of particular interest in monitoring the Earth’s atmosphere because water is a fundamental component and it is well established that the accuracy of collisional broadening parameters has a crucial influence on reduction of remote sensing data. Therefore, a particular effort has been made in order to reduce instrumental as well as systematic errors. Experimental determinations have also been supported by theoretical calculations.
Keywordspressure broadening pressure shift relaxation rotational transition water
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