#
# power_vs_pass
#
# get
#   filed power vs the number of passes in an optical cavity.
#

if test $# -ne 1 
then
  echo usage: `basename $0` ELFIN_outputfile
  exit
fi

grep '=' $1 | \
egrep 'Repetition|fractional gain' |\
awk -F"=" '
  BEGIN{
    flg = 1
    printf ("# %16s %16s\n", "Pass_Number", "Fractinal_Gain" );
  }
$0 ~ /Repetition/{
    if(flg == 0){ printf("%16d %16e\n", rep, gain ) } 
    rep = $2 ;
    flg = 1
  }
$0 ~ /fractional gain/{ 
     gain = $2
     flg = 0 
   }
'