Re: VLF: DK7FC > W1VD / K3SIW 8.27 kHz EbNaut - We don't give up!

[Paul Nicholson <vlf0403@abelian.org>]

Now a script to normalise and stack.  This uses the
standard unix join command instead of vtjoin, since
the files are already ASCII and all share the same
record number, we can just join on column 1.

#!/bin/bash

dir=$1

rm -f stack.dat

for file in $(ls $dir/*.wav)
do

   vtwavex $file |
      vtraw -oa |
      ./iqnorm2 > temp.dat


   [ ! -f stack.dat ] && {
      # first file
      mv temp.dat stack.dat
   } || {
      # subsequent files
      join stack.dat temp.dat | awk '{
         printf( "%s %.5e %.5e\n", $1, $2 + $4, $3 + $5)
      }' > new.dat

      mv new.dat stack.dat
   }

done

Save that as, say, normstack and make executable.

Then I run

./normstack W1VD

which produces a stack.dat, then

cat stack.dat | ebnaut -dp16K21A -r0.4572395 -T 198.3 -F0.1 ...

Similarly,

./normstack K3SIW

cat stack.dat | ebnaut -dp16K21A -r0.771603 -T 216 -F0.0 ...

This works because ebnaut ignores the timestamp (or whatever else)
in column 1.

--
Paul Nicholson
--