4if [ -z $JPP_DIR ]; then
 
    5    echo "Variable JPP_DIR undefined."
 
    9source $JPP_DIR/setenv.sh $JPP_DIR >& /dev/null
 
   11set_variable:  DEBUG         ACOUSTICS_DEBUG       2
 
   12set_variable:  WORKDIR       ACOUSTICS_WORKDIR     ./
 
   13set_variable:  THREADS       ACOUSTICS_THREADS     5
 
   14set_variable+  HYDROPHONE    ACOUSTICS_HYDROPHONE  -H hydrophone.txt
 
   15set_variable+  TRANSMITTER   ACOUSTICS_TRANSMITTER -Y transmitter.txt
 
   18    usage "$script <detector file> (input file)+ <script file>"\
 
   19          "\nAuxiliary script for position pre-calibration."\
 
   20          "\nInput files correspond to the output of JAcousticsEventBuilder[.sh]."
 
   24    fatal "Wrong number of arguments."
 
   27set_variable  DETECTOR            $argv[1]
 
   28set_array     INPUT_FILES         $argv[2,-2]
 
   29set_variable  SCRIPT              $argv[-1]
 
   31eval `JPrintDetector -a $DETECTOR -O IDENTIFIER`
 
   33JAcoustics.sh   $DETECTOR_ID
 
   39    -f "$INPUT_FILES[*]"                       \
 
   42    -V sound_velocity.txt                      \
 
   44    -@ acoustics_fit_parameters.txt            \