Hitran .par file example download

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Toggle Main Navigation. Search MathWorks. By default, the partition function is calculated by summing over the energy levels deduced from. The parsums. Make sure only a single value is selected in the T and Q columns. Alternatively you can supply a text file with two columns - T and Q.

The procedure must be repeated for each isotopologue. To display the linelist, simply drag and drop the. It is also possible to produce an energy level plot View , Levels : Note that HITRAN only provides partition functions staring at 70 K; for lower temperatures it is probably more accurate to delete the Interpolated Partition Function or make it inactive , as the energy levels inferred from the HITRAN file will be complete for lower temperatures. Rothman, R. Gamache, and A. Transfer 98 , Tennyson et al.

Ngo, D. Lisak, H. Tran, J. Hartmann, "An isolated line-shape model to go beyond the Voigt profile in spectroscopic databases and radiative transfer codes", J.

Definitions and Units: Line-by-line Parameters. Applications Temperature dependence of the line intensity To calculate the intensity at temperatures different from the HITRAN reference temperature of K, one uses the following expression, which is derived from Eq.

The lower-state energy of the transition cm -1 This quantity has been defined such that the minimum possible level of the particular isotopologue is set to zero. Line lists in. At its simplest, the line positions and intensities can be overlaid as an "experimental" spectrum in an overlay , but the files can also be used as input to line position or intensity fits PGOPHER can use the quantum numbers in the file or imported as an external source allowing more general application of many of the features of PGOPHER, such as energy level plots, in addition to standard simulations.

Transfer 96 , The extension is typically. Both the older character line and the newer character line formats can be read. Lines that do not begin with a number are ignored, but all other lines must be exactly or characters in length.

Alternative output formats may be handled by future versions. To overlay a linelist simply load the. For this to work extension must normally be. This mode is the least flexible, as the only adjustment possible is the addition of a constant width to the lines if the Convolute option is set in the Experimental Plot.

To fit to energy levels, use the procedure for line position fitting with line lists in separate file s, for which the.