Init input parameters (parameter -- description -- options, with default given first):

init_option -- determines how initial profiles are specified -- 'analytic', 'iterdb', or 'restart'
init_file -- file with initial profile data (if using 'iterdb' option) -- path of profile input file
init_time -- time during discharge to sample experimental data in seconds (if using 'iterdb option)
iter_file -- file with old profile data for restarts in the middle of a timestep -- path of file
rln -- initial R/Ln (if using 'analytic' init_option) -- default 1.0
rlti -- initial R/LTi (if using 'analytic' init_option) -- default 4.0
rlte -- initial R/LTe (if using 'analytic' init_option) -- default 4.0
nedge -- edge density (if using 'analytic' init_option) -- default -1.0
tiedge -- edge Ti (if using 'analytic' init_option) -- default -1.0
teedge -- edge Te (if using 'analytic' init_option) -- default -1.0