gistfile1.sh

#!/bin/bash
if [ -z "$1" ]; then
  echo "Parameter missing"
  exit
fi
atmo=`echo "-5000*l(10^-6)" | bc -l`
velocity="42" #dummy value
echo "Atmospheric height: $atmo m"
echo ""
echo "" > vtdata
while (( $(bc -l <<< "$velocity > 2") ))
do
  altitude=`curl -s "http://$1/telemachus/datalink?a=v.altitude" | grep -oE "\-?[0-9]+(\.[0-9]*)?"`
  if (( $(bc -l <<< "$altitude < $atmo") )); then
    velocity=`curl -s "http://$1/telemachus/datalink?v=v.surfaceVelocity" | grep -oE "\-?[0-9]+(\.[0-9]*)?"`
    radar=`curl -s "http://$1/telemachus/datalink?v=v.heightFromTerrain" | grep -oE "\-?[0-9]+(\.[0-9]*)?"`
    printf "\e[1A%.1f m %.1f m/s %.1f m\n" "$altitude" "$velocity" "$radar"
    echo "$altitude $velocity $radar" >> vtdata
  else
    printf "\e[1AToo high: %.1f m (Threshold: %.1f m)\n" "$altitude" "$atmo"
  fi
  sleep 1
done
echo "landed"