A GNSS MULTIPATH SIMULATOR FOR NEAR-SURFACE 
REFLECTOMETRY AND POSITIONING APPLICATIONS.
 Nievinski, F.G. and Larson, K.M. (2014)
 "Forward modeling of GPS multipath for near-
 surface reflectometry and positioning 
 applications", GPS Solut., 18(2):309-322.
 <http://doi.org/10.1007/s10291-013-0331-y>
 Nievinski, F.G. and Larson, K.M. (2014)
 "An open source GPS multipath simulator 
 in Matlab/Octave", GPS Solut., 18(3):473-481.
 <http://doi.org/10.1007/s10291-014-0370-z>
1) Installation
 1.A) In Matlab, drag the file "init.m" 
 and drop it into its main command window;
 this will initialize the search path.
 1.B) Alternatively, if running Octave (where 
 drag/drop may not be available), enter:
 run ~/mpsim/init.m
 modifying the ~ path to reflect your install.
 Furthermore, for greater Matlab compatibility, 
 it is recommended to start Octave with the 
 option "--traditional".
 1.C) In Octave, you might want to try different
 graphics toolkits availabe -- it's a tradeoff 
 between quality and reliability:
 graphics_toolkit('qt')
 %graphics_toolkit('gnuplot')
 1.D) In Octave, load the statistics package 
 that comes pre-installed:
 pkg load statistics
2) The simplest simulation run can be achieved 
entering the following command:
 snr_fwd
3) Usage examples are available in sub-directory 
"script", which contains driver scripts named 
after each figure in the articles above.
3.1) The original figure images are saved in 
sub-directory "image"; please compare to 
those generated as you run the script examples.
4) A tutorial is available in file "snr_demo.html", 
which can be viewed with any Web browser.
5) Documentation for the input/output syntax of 
the main functions can be accessed from within 
Matlab/Octave, by entering any of the following
commands:
 help snr_fwd
 help snr_setup
 help snr_settings
 help get_permittivity