====== Extracting maser-gps and formatter-gps offsets ======
<code>
grep hpib crds51hb.log | grep E | sed 's/\// /g' | sed 's/2012.//' | sed 's/\./ /' | sed 's/\...//' | awk '{print $1, $2, $4}' > hpib.txt
grep fmout crds51hb.log | grep E | sed 's/\// /g' | sed 's/2012.//' | sed 's/\./ /' | sed 's/\...//' | awk '{print $1, $2, $4}' > fmout.txt

gnuplot  
set timefmt "%j %H:%M:%S"
set xdata time
set xtics format "%H:%M"
set key outside
set title 'CRDS51 clock offsets'
plot 'fmout.txt' u 1:($3*1.0e+6) t 'Formatter - GPS (us)', 'hpib.txt' u 1:($3*1.0e+6) t 'Maser - GPS (us)'
set terminal png
set output 'crds51timing.png'
replot


  </code>