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About this app

bytran is an application for calculating atmospheric and molecular absorption spectra using the HITRAN database and the line-by-line method. The concentrations of molecules, pathlength, atmospheric pressure, temperature, and other input parameters are used to model the gas mixture optical transmission spectra as a function of wavelength.

Additional information is available at the bytran website and in the following publication, http://dx.doi.org/10.1007/s12145-017-0288-4 (a view only version of this publication is available at http://rdcu.be/piDB).
Updated on
May 15, 2019

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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What's new

1) Calculation speed improvements.
2) HITRAN files may now be stored and accessed in a binary format for faster read times and calculations.
3) Kielkopf algorithm in the notation given by Schreier (http://www.bytran.org/kielkopf.htm) for the calculation of the Voigt profile was added for fast low accuracy estimates.
4) The downloaded HITRAN data, the calculation results, and the configuration file may now be optionally stored on an external SD card as opposed to the internal storage.