.. _optical_basspaurquadratic:

O3_BASSPAURQUADRATIC
====================
Identical to the :ref:`optical_basspaurlinear` class except the cross-sections
are quadratically interpolated in temperature which is more in accordance with 
recommendations from the associated publications.

Wavelength Range
^^^^^^^^^^^^^^^^
The table covers the wavelength range 245.0180 to 342.7800 nm in 1956 samples, of approximately 0.05 nm per step. 
The spectral resolution is better than 0.025 nm. 

Temperature Range
^^^^^^^^^^^^^^^^^
The Bass-Paur tables provide measurements at 6 temperatures:

1. 203 K
2. 223 K
3. 246 K
4. 273 K
5. 276 K 
6. 280 K

This object quadratically interpolates cross-sections in temperature as given by the references.

Example
^^^^^^^
::

   optprop = ISKOpticalProperty('O3_BASSPAURQUADRATIC')
   msis = ISKClimatology('MSIS90');
   mjd = 52393.3792987115;
   location = [0.0, 0.0, 25000.0, mjd];
   optprop.SetAtmosphericState( msis)
   optprop.SetLocation(location)
   [ok, abs, ext,sca] = optprop.CalculateCrossSections( 1.0E7/600.0, location );

Data Source
^^^^^^^^^^^
These data are an exact replication of the data files,

* bp_203clc.dat
* bp_223clc.dat
* bp_246clc.dat
* bp_273clc.dat
* bp_276clc.dat
* bp_280clc.dat

on the IGACO site, http://igaco-o3.fmi.fi/ACSO/files/cross_sections.  The files were copied on July 25 2012.
Note that the entries for 282.470 nm and 282.460 nm were swapped around as they are in the wrong order in 
the original files.


References
^^^^^^^^^^
Bass, A. M. and Paur, R. J., The ultraviolet cross-sections of ozone, I. Measurements.  Proc. Quadrennial Ozone Symp. Halkidiki, Greece, Reidel, Dordrecht, pp. 606-610, 1984

Bass, A. M. and Paur, R. J., The ultraviolet cross-sections of ozone, II Results and temperature dependence. Proc. Quadrennial Ozone Symp. Halkidiki, Greece, Reidel, Dordrecht, pp. 611-616, 1984