the files model_lsqr_02_01988_09_1603_SH.xyzv.gz
and model_lsqr_02_01988_09_1603_SV.xyzv.gz
contain, respectively, the Vsh and Vsv components
of model C as published by Boschi and Ekstrom (2001).
pre_jgr.pdf.gz is a reprint of such article.
The format of the (ascii) model files is as follows:
ABSOLUTE Vsh and Vsv are given, in km/s;
each model (Vsh and Vsv) is described by a grid of
points covering, horizontally, the whole Earth's surface,
and in the radial direction stretching down to a depth
of ~1000 km (note that, below some 300-400 km depth, model
reliability is expected to decrease rapidly with increasing
depth - see article).
Grid nodes are the centers of 5x5 degrees blocks in the
horizontal direction, and 5 km away from each other in the
radial direction. All grid nodes are located within the
Earth's mantle; the depth of the Moho is laterally variable,
as in Crust-5.1; therefore, the location of the shallowest grid node
in the files described here will also vary laterally. Crust-5.1,
which is part of our reference model, should be used if
the crust also is to be represented.
In case you are curious, the filenames are not randomly generated
but contain some info about the models:
lsqr is the inversion algorithm.
02 is the number of observables inverted for (Vsh and Vsv).
1988 is the number of 5x5 degrees equal-area blocks in the
original horizontal parameterization of the model.
09 is the number of radial splines in the original etc.
1603 is an internal ID number for the model, corresponding to
what in the paper we called "model C".
SH, SV indicate what parameter the file actually contains.
Lapo from Napoli, November 9, 2001.