1. HITRANonline: A New Structure and Interface for HITRAN
Line Lists and Cross Sections
C. Hill,a,b L.S. Rothman,a I.E. Gordon,a
R.V. Kochanov,a,c P. Wcisło,a,d J. Wilzewskie
aHarvard-Smithsonian Center for Astrophysics
Atomic and Molecular Physics Division
Cambridge MA, USA
bUniversity College London, London, UK
cTomsk State University, Tomsk, RUSSIA
dNicolas Copernicus University, Torun, POLAND
eHarvard University, Astronomy Dept, Cambridge MA, USA
HITRANonline <
22 June 2015

2. New Structure for HITRAN: Advantages
New parameter sets
Planetary applications
Line-shape functions
Advanced remote sensing
Precision and long fields
Power to the user
Ease of filtering
Graphical preview
Complex queries
Diverse outputs
Source availability
Poor man’s FASCODE
Power to the manager
Simple tables for data
Provenance for data
Data validation
Expandability
Consistency

3. Current (HITRAN 2004+) 160-character .par format……
ASCII text format: 160 bytes per transition
Fixed-width formats for data fields (Fortran-friendly)
Total database size (without supplementary data): 440 MB

4. Additional Parameters
Wider Coverage
Molecules and isotopologues for planetary atmospheres (SO, C2N2, C3H8, C3H4, H3+, CH3, …)
Molecules and isotopologues for astrophysical, environmental, and other diverse applications.
Radioactive species
Line Shape
Other foreign collision partners (H2, He, H2O, CO2,…)
Pressure shifts
Temperature dependences
Parameters for Hartmann-Tran profile (HTP)
Line mixing
Future requirements…

5. Field-length Issues Frequency comb work
Calibration standards in telecommunication bands
Acetylene and methane calibration lines
Floating decimal point
Line-shape parameters
- self-broadened width; temperature dependence; etc.
Quantum assignments
- polyatomics with many vibrational modes
- open-shell species
- dynamic molecules (e.g. torsional modes)
- hyperfine coupling to more than one nucleus (e.g. N2O)
- Zeeman splitting?
Reference pointers
- Example: Water air-broadened half widths

6. Power to the User Ease of filtering Pull down menus
Graphical preview
Relational database structure
More parameters, more significant figures, etc.
Complex queries
HAPI
Diverse outputs
ASCII, XSAMS, HDF-5, delimited, customized,
drag and drop parameters
Source availability
- Cursor over parameters shows information
- Cursor over parameter, and then link to source
- Citations increase for contributors
HAPI (HITRAN Application Programing Interface)
- Additional filtering capabilities
- Partition sums
- Absorption coefficients
- Poor man’s FASCODE

7. HITRANonline Interface

11. Generated Output Files

12. Generated Overview Plot
cm-1

13. Brief Summary of Parameters

14. Example of Cross-Section Search

15. Power to the Manager Simple tables for data Provenance for data
- Handling of unavailable data more flexible
Provenance for data
- Time stamp
Data validation
- Selection rules obeyed
- Sanity checks
Consistency
- Enabled by each state or energy level archived only once
Expandability

16. Summary New Structure for HITRAN Molecular Spectroscopic Database
- Allows for more advanced radiative-transfer calculations
- Provided with powerful user tools
Access:
Future
- More parameters
- More accuracy
- More measurements and theoretical calculations!

17. SAO HITRAN team members
Acknowledgments
SAO HITRAN team members
Iouli Gordon Christian Hill
Kelly Chance Roman Kochanov
Jonas Wilzewski Piotr Wcisło
James Damon Lorenzo Barrett
Sergey Tashkun, Semen Mikhailenko, Yuri Babikov
V.E. Zuev Institute of Atmospheric Optics, Tomsk, Russia
Funding Support
NASA Earth Observing System
NASA Planetary Atmospheres Program
Cooperative Research Development Foundation