VI-1_Babikov - Harvard-Smithsonian Center for Astrophysics

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Transcript VI-1_Babikov - Harvard-Smithsonian Center for Astrophysics

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
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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
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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-TO09) 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:
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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:
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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
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Registered users may also:
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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 (09-05-92508ИК_а) and CRDF (RUG1-2954-TO-09) grant.
Thank you for attention!