#!/bin/csh

umask 000
set oasis = /oasis
set today = `date -u +%Y%j`
set ndays = 7
if ($#argv > 0) set ndays = $1

rm -f ppl.meta* >& /dev/null

echo Stripping out daily headers...
rm -f gps.dat >& /dev/null
@ day = $today - $ndays
while ( $day <= $today )
	grep -v \# $day >> gps.dat
	@ day++
end

echo ""
echo Begin plotting gps.dat...
/usr/local/pplus/bin/pplus gps_mercator.ppc
echo Finished plotting gps.dat...

rm -f gps.dat echo.file >& /dev/null

echo ""
echo To print graph downstairs, use:    'ppl2ps ppl.meta001'
echo Finished
echo ""