Simulation resultsPage is intended for working with spectra of the molecules obtained by simulation (Fig. 1).
At the top of the viewport is a drop-down list of molecule selection, the same as on the page Launch simulation.
Fig. 1. The page of obtained molecular spectra
Below is a set of tabs. The default Spectra tab shows the results of spectra simulation. For each type of spectrum simulation of selected molecule, there is a table of available spectra. The table contains the description of each spectrum and the values of the parameters used in the simulation. The number of columns in the table depends on the simulation type, because different types of simulated spectrum are described by different number of parameters. By default, the page displays a table for the last simulated type of spectrum. In addition to the columns containing the values of the simulation parameters, the table contains some additional columns. We describe them more detailed.
The leftmost column of the table contains checkboxes allowing you to select spectra to perform the actions indicated on the buttons below the table. The checkbox in the table header allows to select all spectra or deselect all spectra.
The next column In is available only to registered users and inform about where is the spectrum saved: in the user's archive (U) or in a temporary storage (C: cache).
The Description column contains the following properties of the spectrum: data source (HITRAN), molecule, isotopologue(s).
The Plot column shows whether the graphical representation of the spectrum is available. The portal sites provide the ability of nteractive manipulation with graphical data in the client browser. The attempt to build a plot for too large data file can cause the "hang" of the browser due to the long time required for building of the plot or exhausting the available RAM. The column can contain the values Y (Yes, the plot is available) or N (No, the plot is not available). Since there is a possibility of plotting several spectra, the choice of a number of spectra to plot may lead to similar results. According to our estimates, the total number of pairs of points (X,Y) for the plot should not exceed 500 thousand, although this limit can vary significantly depending on the parameter (primarily the amount of available RAM) of the user's computer.
The Size column specifies the file size in Kbytes.
The colored box in the next column has the same color as the color of square in a pop-up message about starting of the spectrum simulation. It can be useful for visual identification of the spectrum.
The last column allows to perform some actions with the spectrum. It contains 3 buttons. The button allows you to open a tab containing the numerical view of the spectrum. The button is attended for download the text file containing the spectrum in numerical form. The button allows you to delete a spectrum.
Buttons below the table
The button Plot selected allows you to plot selected spectra. The plot is displayed in a separate tab.
The button Delete selected allows you to delete all marked spectra.
The button Save selected allows you to move marked spectra from temporary storage to the user's archive. Available only to registered users.
Other tabs are used for graphical and numerical representation of selected spectra and appear on the user's requests.
Format of numerical dataNumerical files are displayed in View tabs at the click of a button and downloaded to a user's computer contain several header lines starting with " # " character, which give a verbal description of the contents of the file and the parameter values of the simulated spectrum. Below are the data columns.
For spectral functions the data contains 2 or 3 columns. The first one is the wavenumber WN, and the rest are value(s) of appropriate spectral function. In the case of a list of spectral lines also known as linelist the file contains multiple columns. Each column contains values of one of parameter of spectral line described in the Generalities section. Currently HITRAN-2004 format of the linelist file is supported [1, p.143]. Consult to Generalities/Numerical representation of the results for more detaild information.
RemarkAs described in the section Spectral functions of the Generalities, the spectral function is obtained by a sequence of transformations on a list of spectral lines (linelist) extracted from the database. For example, to obtain the absorption function first the linelist is retrieved, then the function of the absorption coefficient is calculated for this linelist, and on the basis of it is the absorption function is obtained. To build any low-resolution spectrum the appropriate high-resolution spectrum must first be built. Now, all intermediate results of the spectrum simulation is also available on this page.
- L.S. Rothman, D. Jacquemart, A. Barbe, D.C. Benner, M. Birk, L.R. Brown, M.R. Carleer, C. Chackerian Jr., K. Chance, L.H. Coudert, V. Dana, V. Malathy Devi, J.-M. Flaud, R.R. Gamache, A. Goldman, J.-M. Hartmann, K.W. Jucks, A.G. Maki, J.-Y. Mandin, S.T. Massie, J. Orphal, A. Perrin, C.P. Rinsland, M.A.H. Smith, J. Tennyson, R.N. Tolchenov, J. Vander Auwera, P. Varanasi, G. Wagner, The HITRAN2004 Molecular Spectroscopic Database. J. Quant. Spectrosc. Radiat. Transfer, 96, 139-204 (2005).