Information System to Access HITRAN via the Internet

Yu. L. Babikov, S. N. Mikhailenko, S. A. Tashkun,

V.E. Zuev Institute of Atmospheric Optics, Tomsk, Russia.

I. E. Gordon, L. S. Rothman

Harvard-Smitsonian Center for Astrophysics, Cambridge, MA USA

The 11th HITRAN Database Conference June 16 – June 18, 2010

Prototype system: SPECTRA

Development started in 2000 Present shape was fixed in 2004-2005 After that: some minor modifications, bug correction, maintenance of database actual state Internet site: http://spectra.iao.ru SPECTRA system was presented in the previous

HITRAN conference: S. Mikhailenko, Yu.Babikov, Vl.Golovko, S. Tashkun, SPECTRA, an Internet accessible information system for spectroscopy of atmospheric gases // 10th HITRAN Database Conference, Cambridge, MA, USA, June 22-24, 2008, Poster PI-13

Some history

2007. Dr. Rothman suggested to start a collaboration.

In frames of this collaboration he suggested to develop an Internet information system, like SPECTRA to access to HITRAN databank.

2008. The project «Fundamental spectroscopic system for climate change monitoring» was initiated.

2009. Project was supported by CRDF (RUG1-2954-TO-09) and RFBR (09-05-92508) joint grant.

Hitran on the Web: Homepage

Hitran on the Web: Database.

As a data storage used relational database managed by MySQL DBMS. This database consists of 4 parts:

main database (Molecules, Isotopologues, Vibrational states, Transitions, Line lists, Gas mixtures, Partition functions and so on);

auxiliary database (Users, News, Bibliography ...); user's database for user defined data; temporary database for temporary tables created by

the system while processing of user's requests.

Hitran on the Web: Functionality.

All users (unregistered and registered) may:• Survey of the HITRAN database content for a specified spectral range• Specify a set of vibrational bands for a given HITRAN isotopologue for a

selected wavenumber region• Specify a gas mixture from a set of built-in standard atmospheric

concentration profiles for a selected wavenumber region• Visualize stick intensity diagram of the specified mixture• Simulate one of built-in spectral functions (absorption coefficient profile,

transmittance, absorption, or radiance) of the mixture spectrum convolved with one of built-in apparatus function for various physical (temperature, pressure, pathlength) and simulation (intensity cutoff, contour shape, wing length, resolution, etc) conditions

Registered users may also:

• Prepare user defined gas mixtures• Save simulation results on the server side and compare them• Upload spectra to the server side and compare them with previously

simulated spectra

HITRAN survey I

HITRAN survey II

Survey of available molecules

Survey of available isotopologues and transitions for a selected molecule

Stick diagram for selected transitions

Simulation of Absorption coefficient for the diagram shown above

Gas mixture spectrum. Parameters for simulation.

Gas mixture spectrum.Stick diagram for given parameters.

Gas mixture spectrum. Numerical view.

Gas mixture spectrum. Transmittance function for the stick diagram shown above.

Cross-sections. Survey.

Cross-sections. Graphics.

Auxiliary data. Built-in gas mixtures.

Auxiliary data. Partition functions.

General bibliographic references

Link to the electronic publication

Bibliographic references by molecules

Search for publication

Future work• Implement algorithms for fast calculation of absorption

coefficients (Boris Fomin)• Expand the set of supported line shapes• Implement additional options to work with the user defined

data• Fill of a database of bibliographic references and expand

possibilities of work with the bibliography• Create the help system: well structured and detailed• Re-release the plotting software on the base of the

Protochart JavaScript: include interactive drag-and-drop, zoom options and so on.

The current version of the system available via the Internet for testing purposes: http://hitran.iao.ru

Acknowledgements

We acknowledge support from a joint RFBR (09-05-92508-ИК_а) and CRDF (RUG1-2954-TO-09) grant.

Thank you for attention!