Variables issue #1 fixed. Thanks gonzalo-

receive.sh

@@ -9,12 +9,12 @@ fi
 # $4 = TLE File
 # $5 = EPOC start time
 # $6 = Time to capture
-start=`date '+%d-%m-%Y %H:%M'`
-timeout $6 rtl_fm -f ${2}M -s 60k -g 50 -p 55 -E wav -E deemp -F 9 - | sox -t raw -e signed -c 1 -b 16 -r 60000 - /home/pi/audio/$3.wav rate 11025
+START_DATE=$(date '+%d-%m-%Y %H:%M')
+timeout "${6}" rtl_fm -f "${2}"M -s 60k -g 50 -p 55 -E wav -E deemp -F 9 - | sox -t raw -e signed -c 1 -b 16 -r 60000 - /home/pi/audio/"${3}".wav rate 11025
 
-PassStart=`expr $5 + 90`
-/usr/local/bin/wxmap -T "${1}" -H $4 -p 0 -l 0 -o $PassStart /home/pi/map/${3}-map.png
+PASS_START=$("$5" + 90)
+/usr/local/bin/wxmap -T "${1}" -H "${4}" -p 0 -l 0 -o "${PASS_START}" /home/pi/map/"${3}"-map.png
 for i in ZA MCIR MCIR-precip MSA MSA-precip HVC-precip HVCT-precip HVC HVCT; do
-	/usr/local/bin/wxtoimg -o -m /home/pi/map/${3}-map.png -e $i /home/pi/audio/$3.wav /home/pi/image/$3-$i.png
-	/usr/bin/convert /home/pi/image/$3-$i.png -undercolor black -fill yellow -pointsize 18 -annotate +20+20 "$1 $start" /home/pi/image/$3-$i.png
+	/usr/local/bin/wxtoimg -o -m /home/pi/map/"${3}"-map.png -e $i /home/pi/audio/"${3}".wav /home/pi/image/"${3}"-$i.png
+	/usr/bin/convert /home/pi/image/"${3}"-$i.png -undercolor black -fill yellow -pointsize 18 -annotate +20+20 "$1 $START_DATE" /home/pi/image/"${3}"-$i.png
 done

schedule.sh

@@ -5,8 +5,7 @@ grep "NOAA 18" /home/pi/predict/weather.txt -A 2 >> /home/pi/predict/weather.tle
 grep "NOAA 19" /home/pi/predict/weather.txt -A 2 >> /home/pi/predict/weather.tle
 
 #Remove all AT jobs
-for i in `atq | awk '{print $1}'`;do atrm $i;done
-
+for i in $(atq | awk '{print $1}');do atrm "$i";done
 
 #Schedule Satellite Passes:
 /home/pi/schedule_sat.sh "NOAA 19" 137.1000

schedule_sat.sh

@@ -1,25 +1,25 @@
 #!/bin/bash
-PREDICTION_START=`/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" | head -1`
-PREDICTION_END=`/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" | tail -1`
+PREDICTION_START=$(/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" | head -1)
+PREDICTION_END=$(/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" | tail -1)
 
-var2=`echo $PREDICTION_END | cut -d " " -f 1`
+var2=$(echo "$PREDICTION_END" | cut -d " " -f 1)
 
-MAXELEV=`/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" | awk -v max=0 '{if($5>max){max=$5}}END{print max}'`
+MAXELEV=$(/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" | awk -v max=0 '{if($5>max){max=$5}}END{print max}')
 
-while [ `date --date="@${var2}" +%D` == `date +%D` ]; do
-	START_TIME=`echo $PREDICTION_START | cut -d " " -f 3-4`
-	var1=`echo $PREDICTION_START | cut -d " " -f 1`
-	var3=`echo $START_TIME | cut -d " " -f 2 | cut -d ":" -f 3`
-	TIMER=`expr $var2 - $var1 + $var3`
-	OUTDATE=`date --date="TZ=\"UTC\" $START_TIME" +%Y%m%d-%H%M%S`
-	if [ $MAXELEV -gt 19 ]
-  		then
-			echo ${1//" "}${OUTDATE} $MAXELEV
-			echo "/home/pi/receive.sh \"${1}\" $2 ${1//" "}${OUTDATE} /home/pi/predict/weather.tle $var1 $TIMER" | at `date --date="TZ=\"UTC\" $START_TIME" +"%H:%M %D"`
+while [ "$(date --date="@${var2}" +%D)" == "$(date +%D)" ]; do
+	START_TIME=$(echo "$PREDICTION_START" | cut -d " " -f 3-4)
+	var1=$(echo "$PREDICTION_START" | cut -d " " -f 1)
+	var3=$(echo "$START_TIME" | cut -d " " -f 2 | cut -d ":" -f 3)
+	TIMER=$("${var2}" - "${var1}" + "${var3}")
+	OUTDATE=$(date --date="TZ=\"UTC\" '${START_TIME}'" +%Y%m%d-%H%M%S)
+	if [ "${MAXELEV}" -gt 19 ]
+	then
+		echo "${1//" "}""${OUTDATE}" "$MAXELEV"
+		echo "/home/pi/receive.sh \"${1}\" $2 '${1//" "}'${OUTDATE} /home/pi/predict/weather.tle ${var1} '${TIMER}'" | at "$(date --date="TZ=\"UTC\" '${START_TIME}'" +"%H:%M %D")"
 	fi
-	nextpredict=`expr $var2 + 60`
-	PREDICTION_START=`/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" $nextpredict | head -1`
-	PREDICTION_END=`/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}"  $nextpredict | tail -1`
-	MAXELEV=`/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" $nextpredict | awk -v max=0 '{if($5>max){max=$5}}END{print max}'`
-	var2=`echo $PREDICTION_END | cut -d " " -f 1`
+	nextpredict=$("${var2}" + 60)
+	PREDICTION_START=$(/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" "${nextpredict}" | head -1)
+	PREDICTION_END=$(/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}"  "${nextpredict}" | tail -1)
+	MAXELEV=$(/usr/bin/predict -t /home/pi/predict/weather.tle -p "${1}" "${nextpredict}" | awk -v max=0 '{if($5>max){max=$5}}END{print max}')
+	var2=$(echo "${PREDICTION_END}" | cut -d " " -f 1)
 done