diff --git a/config b/config
index 634d4d57..d0cf7ca4 100755
--- a/config
+++ b/config
@@ -260,6 +260,12 @@ if [ "$1" = "" ]; then
 		echo "Random Failure Mode is OFF"
 	fi
 
+	if [ "${14}" = "y" ] || [ "${14}" = "yes" ] ; then
+		echo "Doppler frequency shift mode enabled"
+	else
+		echo "Doppler frequency shift is OFF"
+	fi
+
 	echo -n "TX Frequency is: "
 	echo -n ${7}
 	echo -n " MHz, RX Frequency is: "
@@ -368,7 +374,7 @@ if [ "$1" = "" ]; then
 	echo -e "Current sim.cfg configuration file:"	
 #	echo
 	
-	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13}
+	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14}
 	echo
 	
 	echo "To change, include an OPTION"
@@ -497,7 +503,7 @@ elif [ "$1" = "-t" ]; then
 	
 	echo
 	
-#	$1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${12} ${13} 
+#	$1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${12} ${13} ${14}
 
 	echo "Do you want Simulated Telemetry ON (y/n) "
 	read sim
@@ -515,8 +521,8 @@ elif [ "$1" = "-t" ]; then
 #	echo
 	echo -e "\nCubeSatSim configuration sim.cfg file updated to: \n"
 #	echo
-	echo $1 $2 $3 $4 $sim $6 $7 $8 $9 ${10} ${11} ${12} ${13}
-	echo $1 $2 $3 $4 $sim $6 $7 $8 $9 ${10} ${11} ${12} ${13} > /home/pi/CubeSatSim/sim.cfg
+	echo $1 $2 $3 $4 $sim $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14}
+	echo $1 $2 $3 $4 $sim $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14}> /home/pi/CubeSatSim/sim.cfg
 	echo
 ##	echo "Rebooting CubeSatSim with new configuration file"
 ##	echo
@@ -545,7 +551,7 @@ elif [ "$1" = "-c" ]; then
 	echo $oldcallsign
 	echo
 	
-#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${12} ${13}
+#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${12} ${13} ${14}
 
 	echo "Enter callsign in all capitals: "
 	read callsign
@@ -559,8 +565,8 @@ elif [ "$1" = "-c" ]; then
 	
 		echo -e "\nCubeSatSim configuration sim.cfg file updated to: \n"
 
-		echo $callsign $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13}
-		echo $callsign $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} > /home/pi/CubeSatSim/sim.cfg
+		echo $callsign $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14}
+		echo $callsign $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14} > /home/pi/CubeSatSim/sim.cfg
 	fi
 	
 	if [ "$norestart" = "1" ]; then
@@ -593,7 +599,7 @@ elif [ "$1" = "-r" ]; then
 	echo $2
 	echo
 	
-#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} 
+#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14}
 
 	echo -e "Enter Reset Count (integer): "
 
@@ -613,8 +619,8 @@ elif [ "$1" = "-r" ]; then
 
 		echo -e "\nCubeSatSim configuration sim.cfg file updated to: \n"
 
-		echo $1 $resets $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13}
-		echo $1 $resets $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} > /home/pi/CubeSatSim/sim.cfg
+		echo $1 $resets $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14}
+		echo $1 $resets $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14} > /home/pi/CubeSatSim/sim.cfg
 	fi	
 
 	if [ "$norestart" = "1" ]; then
@@ -648,7 +654,7 @@ elif [ "$1" = "-l" ]; then
 	echo $3
 	echo
 	
-#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13}
+#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14}
 
 	echo -e "Enter latitude  (decimal degrees, positive is north): "
 
@@ -690,8 +696,8 @@ elif [ "$1" = "-l" ]; then
 	fi 
 
 	echo -e "\nCubeSatSim configuration sim.cfg file updated to: \n"
-	echo $1 $2 $lat $long $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13}
-	echo $1 $2 $lat $long $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} > /home/pi/CubeSatSim/sim.cfg
+	echo $1 $2 $lat $long $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14}
+	echo $1 $2 $lat $long $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14} > /home/pi/CubeSatSim/sim.cfg
 	
 	if [ "$norestart" = "1" ]; then
 		echo 
@@ -1002,7 +1008,7 @@ elif [ "$1" = "-q" ]; then
 	echo $6
 	echo
 	
-#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13}
+#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14}
 
 	echo -e "Enter squelch  (integer 1 - 8): "
 
@@ -1024,8 +1030,8 @@ elif [ "$1" = "-q" ]; then
 #	echo
 	echo -e "\nCubeSatSim configuration sim.cfg file updated to: \n"
 #	echo
-	echo $1 $2 $3 $4 $5 $sq $7 $8 $9 ${10} ${11} ${12} ${13}
-	echo $1 $2 $3 $4 $4 $sq $7 $8 $9 ${10} ${11} ${12} ${13} > /home/pi/CubeSatSim/sim.cfg
+	echo $1 $2 $3 $4 $5 $sq $7 $8 $9 ${10} ${11} ${12} ${13} ${14}
+	echo $1 $2 $3 $4 $4 $sq $7 $8 $9 ${10} ${11} ${12} ${13} ${14} > /home/pi/CubeSatSim/sim.cfg
 	echo
 	echo "Restarting CubeSatSim with new configuration file"
 ##	echo
@@ -1061,7 +1067,7 @@ elif [ "$1" = "-P" ]; then
 	echo ${11}
 	echo
 	
-#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13}
+#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14}
 
 	echo -e "Enter RX PL value integer 0: None, 01-38： CTCSS （analog, 39-121：CDCSS （digital）"
 
@@ -1104,8 +1110,8 @@ elif [ "$1" = "-P" ]; then
 #	echo
 	echo -e "\nCubeSatSim configuration sim.cfg file updated to: \n"
 #	echo
-	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 $rxpl $txpl ${12} ${13}
-	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 $rxpl $txpl ${12} ${13} > /home/pi/CubeSatSim/sim.cfg
+	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 $rxpl $txpl ${12} ${13} ${14}
+	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 $rxpl $txpl ${12} ${13} ${14} > /home/pi/CubeSatSim/sim.cfg
 	echo
 ##	echo "Rebooting CubeSatSim with new configuration file"
 ##	echo
@@ -1135,7 +1141,7 @@ elif [ "$1" = "-F" ]; then
 	echo $8
 	echo	
 
-#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13}
+#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14}
 
 	echo "Enter tx frequency as 4XX.XXXX: "
 	read tx
@@ -1156,8 +1162,8 @@ elif [ "$1" = "-F" ]; then
 	fi
 	echo -e "\nCubeSatSim configuration sim.cfg file updated to: \n"
 
-	echo $1 $2 $3 $4 $5 $6 $tx $rx $9 ${10} ${11} ${12} ${13}
-	echo $1 $2 $3 $4 $5 $6 $tx $rx $9 ${10} ${11} ${12} ${13} > /home/pi/CubeSatSim/sim.cfg
+	echo $1 $2 $3 $4 $5 $6 $tx $rx $9 ${10} ${11} ${12} ${13} ${14}
+	echo $1 $2 $3 $4 $5 $6 $tx $rx $9 ${10} ${11} ${12} ${13} ${14} > /home/pi/CubeSatSim/sim.cfg
 
 	echo
 	echo "Restarting CubeSatSim with new configuration file"
@@ -1228,7 +1234,7 @@ elif [ "$1" = "-H" ]; then
 	
 	echo
 	
-#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13}
+#	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} ${14} 
 
 	echo "Do you want Balloon mode ON (y/n) "
 	read hab
@@ -1245,8 +1251,8 @@ elif [ "$1" = "-H" ]; then
 #	echo
 	echo -e "\nCubeSatSim configuration sim.cfg file updated to: \n"
 #	echo
-	echo $1 $2 $3 $4 $5 $6 $7 $8 $hab ${10} ${11} ${12} ${13}
-	echo $1 $2 $3 $4 $5 $6 $7 $8 $hab ${10} ${11} ${12} ${13} > /home/pi/CubeSatSim/sim.cfg
+	echo $1 $2 $3 $4 $5 $6 $7 $8 $hab ${10} ${11} ${12} ${13} ${14}
+	echo $1 $2 $3 $4 $5 $6 $7 $8 $hab ${10} ${11} ${12} ${13} ${14} > /home/pi/CubeSatSim/sim.cfg
 	echo
 ##	echo "Rebooting CubeSatSim with new configuration file"
 ##	echo
@@ -1721,7 +1727,7 @@ elif [ "$1" = "-U" ]; then
 	
 	echo
 	
-#	$1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${12} ${13} 
+#	$1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${12} ${13} ${14}
 
 	echo "Do you want Random Simulated Failure ON (y/n) "
 	read sim
@@ -1761,8 +1767,8 @@ elif [ "$1" = "-U" ]; then
 #	echo
 	echo -e "\nCubeSatSim configuration sim.cfg file updated to: \n"
 #	echo
-	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} $sim $time
-	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} $sim $time > /home/pi/CubeSatSim/sim.cfg
+	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} $sim $time ${14}
+	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} $sim $time ${14} > /home/pi/CubeSatSim/sim.cfg
 	echo
 
 	if [ "${12}" != "$sim" ] || [ "${13}" != "$time" ] ; then
@@ -1888,6 +1894,48 @@ elif [ "$1" = "-k" ]; then
 	reboot=1
 #	sudo systemctl restart pacsatsim
 
+elif [ "$1" = "-K" ]; then
+
+	echo	
+	echo "Editing the Doppler frequency shift setting in"
+	echo  "the configuration file for CubeSatSim"	
+	echo
+	
+	value=`cat /home/pi/CubeSatSim/sim.cfg`
+	echo "$value" > /dev/null
+	set -- $value
+
+	if [ "${14}" = "yes" ] || [ "${14}" = "y" ]; then
+		echo "Doppler frequency shift mode is ON"
+	else
+		echo " Doppler frequency shift mode is OFF"
+	fi
+	
+	echo
+	
+#	$1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${12} ${13} ${14}
+
+	echo "Do you want Doppler frequency shift ON (y/n) "
+	read sim
+	echo
+	
+	if [ "$sim" = "y" ] || [ "$sim" = "yes" ]  ; then
+		doppler="yes"
+		echo "Doppler frequency shift is ON"
+	else
+		doppler="no"
+		echo " Doppler frequency shift is OFF"
+	fi
+	
+#	echo
+	echo -e "\nCubeSatSim configuration sim.cfg file updated to: \n"
+#	echo
+	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} $doppler
+	echo $1 $2 $3 $4 $5 $6 $7 $8 $9 ${10} ${11} ${12} ${13} $doppler > /home/pi/CubeSatSim/sim.cfg
+	echo
+
+	restart=1
+
 elif [ "$1" = "-h" ]; then
 
 	echo "config OPTION"
@@ -1934,6 +1982,7 @@ elif [ "$1" = "-h" ]; then
 	echo "   -N     Set next mode or failure"
 	echo "   -u     Change gpsd state"
 	echo "   -k     Reset the PacSatSim Configuration"
+	echo "   -K     Change the Doppler frequency shift setting"
 
 	echo
 	exit