Making SU Traces from ASCII Data

#!/bin/sh

# assume we are already in scripts directory

DATA=../sudata

# get total number of traces to make, samples per trace, sample interval in micro-seconds

# and base filename to use

nt=$1

nsamp=$2

dt=$3

file=$4

printf "Making %d traces in %s\n" ${nt} ${DATA}/${file}.asc

printf "  with %d samples, and sampling interval of %d micro-seconds\n" ${nsamp} ${dt}

# initialize trace count and sample count

i=0

j=0

# remove file because we are appending

rm ${DATA}/${file}.asc

# loop until nsamp times nt samples are done

while [ ${i} -lt ${nt} ]

do

  while [ ${j} -lt ${nsamp} ]

  do

    j=`echo ${j}+1|bc`

    printf "%d\n" ${j} >> ${DATA}/${file}.asc

  done

  j=0

  i=`echo ${i}+1|bc`

done

# convert ASCII to binary, one sample per line, use .bin extension

a2b n1=1 <$DATA/${file}.asc >$DATA/${file}.bin

# add trace headers

suaddhead ns=${nsamp} < $DATA/trace.bin | sushw key=dt a=${dt} >$DATA/trace.su