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Calculations of atmospheric and molecular absorption spectra of gases using the HITRAN database. The user specifies the concentrations of molecules, total pressure, temperature, optical pathlength and other parameters which are used to model the gas mixture optical transmission spectra as a function of wavelength. Automatic HITRAN database downloads (from or manual placement of the database onto the portable device. Temperature, total pressure, wavelengths and molecular concentrations may be specified. An external SensorTag Bluetooth module ( may be connected to obtain empirical values of total pressure, temperature and humidity as input for line-by-line calculations instead of manual entry (the built in cell phone sensors are not currently supported under the Universal Windows Platform). Voigt, Lorentzian and Doppler lineshapes. Instrument functions. Built in atmospheric models. Sharing calculation results (images and data) from within the application. Absorption, Transmission or Optical Depth spectra. Currently limited to horizontal path mode. Additional information is available in the following publication, (a view only version of this publication is available at


What's new in this version

Support of SensorTag ( - a keychain size coin battery operated Bluetooth device containing temperature, pressure and humidity sensors to model spectra based on measured meteorological parameters.


  • Calculations of atmospheric and molecular transmission using the HITRAN database

Additional information

Published by

Release date


Approximate size

47 MB



This app can

Communicate with already paired Bluetooth devices
Bluetooth smart device
Bluetooth device
Access your Internet connection
Access your Internet connection and act as a server.
Access your home or work networks
Use your pictures library


Get this app while signed in to your Microsoft account and install on up to ten Windows 10 devices.

Language supported

English (United States)

Additional terms

Terms of transaction

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