BACK TO BASICS SYNTHETIC RESISTIVITY DATA

Apparent resistivity data files for 4 test models are located in the subdirectories 
Model_1, Model_2,...,Model_4.  For each of the models, synthetic forward responses of 
a 2D Earth were computed using the RES2DMOD software and resulting data files are provided 
in RES2DINV *.dat format.  Apparent resistivities are given for 6 electrode configurations 
for each model, and the response of each configuration is stored in a separate data 
file with the name of configuration in the filename.  A summary figure 'synthetic_summary.pdf' 
located in the root directory for the synthetic data summarizes array responses for each 
of the four models.

To help guide the inversion/interpretation of the data, we offer this single clue: The 
models are all variants of the depth to bedrock problem.  For simplicity, topographic 
effects are NOT present in the data.  Hence, a flat AIR/EARTH interface is all that is 
required.  Moreover, the basement region of the model is assumed to be homogeneous.  Of 
particular interest with these datasets are answers to the following questions: What is 
the thickness of the overburden region? How can different arrays be usefully combined to 
minimize the uncertainty of this estimate?  What is resistivity distribution in the region 
between the AIR/EARTH interface and the basement?  What is the effective resolution/sampling 
volume in region of the model?  And most importantly, how does the choice of parametrization 
or inversion methodology affect the answers to these questions?

But most importantly, HAVE FUN.  See you in Toronto!

The B2B session conveners, 
R. Knight and C. Weiss.