This is the Chevallier 91L diverse dataset in ARTS format.

As of 2014-12-10 the data is stored in ArrayOfGriddedField4 structure and XML
format applicable with arts-2-3 and newer. Older layouts (ArrayOfMatrix) and
formats (plainASCII) as used by older versions can be derived from the svn
repository (ArrayOfMatrix from ARTS-XML-DATA-2-3-3 and older, plainASCII from
ARTS-XML-DATA-2-1-12 and older). The files in old ARTS format might be of
interest, because this dataset should be particularly useful for model
validation, e.g., to check whether old and new ARTS give consistent results.

The dataset documentation by Chevallier is in file "nwp_saf_profiles91.pdf". 

The original Chevallier data can be found in
"~sbuehler/scalc/2007_10_chevallier_91L/original_data/". The FORTRAN extraction
program that created the ArrayOfMatrix files as well as the ARTS controlfile to
convert it to ArrayOfGriddedField4 format are stored here along with the ARTS
xml-data.

The z profile was generated with the hydrostatic assumption from the surface
pressure and elevation (using the hypsometric equation from Wallace and Hobbs).


1. Full atmospheric states
==============================

The full atmospheric states are stored in: chevallierl91_all_X.xml

where X for the different data sets is: 
t   
q   
oz  
ccol
rcol

These files contain one GriddedField4 for each atmospheric state. (Each file
has 5000 states.) Stored parameters are:

T[K] z[m] CLW[kg/m^3] CIW[kg/m^3] RR[kg/(m2*s)] SR[kg/(m2*s)] H2O_VMR[1] O3_VMR[1]

with following abbreviations:
CLW : Cloud liquid water content
CIW : Cloud ice water content
RR  : Rain rate
SR  : Snow rate

Note: previously existing separate clear and cloudy state file have been
removed.


2. Misc
========

In future, it is forseen to later generate for each data set:
chevallierl91_surface_X.xml

It would contain surface parameters (T, wind speed).
Then, the clear & cloud & surface or full & surface files together
would hold all state information for RT calculations with clouds and
variable surface conditions.


Let us know if anything here is unclear, so that we can fix it.

2007-10-23 Stefan Buehler
2008-05-30 Stefan Buehler
2012-07-19 Jana Mendrok
2014-12-10 Jana Mendrok