What is the relative abundance of a particular isotopologue?
The Gas-cell Simulator assumes the same natural abundances of the various isotopologues as HITRAN. Click here to view the list of assumed abundances. Can I simulate different abundances of isotopologues? Yes. On the Gas Cells Tab, simply select the isotopologue to be simulated and specify the desired abundance. Subscribers can simulate mixtures of different isotopologues, and can control the concentration of each. Note: the concentration of individual isotopologues is automatically scaled by their natural abundance, so you will need to take this into account to achieve a particular vmr. What is “line intensity”? Line intensity is the strength of a molecular absorption/emission line. In most catalogs, including HITRAN, line intensities are given in units of cm-1 / (molecule cm-2) at 296 K. I just need coarse spectra. How do I get this? Subscribers can select an instrument function (Observers Tab) to model spectra as would be obtained from a coarser resolution instrument. Adjusting the w
