diff --git a/sample_sensor_kit_launch/launch/gnss.launch.xml b/sample_sensor_kit_launch/launch/gnss.launch.xml
index 003861c4..2900d07c 100644
--- a/sample_sensor_kit_launch/launch/gnss.launch.xml
+++ b/sample_sensor_kit_launch/launch/gnss.launch.xml
@@ -1,7 +1,6 @@
 <launch>
   <arg name="launch_driver" default="true"/>
   <arg name="gnss_receiver" default="ublox" description="ublox(default) or septentrio"/>
-  <arg name="coordinate_system" default="1" description="1:MGRS, 3:LocalCartesianWGS84, 4:LocalCartesianUTM"/>
 
   <group>
     <push-ros-namespace namespace="gnss"/>
@@ -33,7 +32,6 @@
       <arg name="output_topic_gnss_pose_cov" value="pose_with_covariance"/>
       <arg name="output_topic_gnss_fixed" value="fixed"/>
 
-      <arg name="coordinate_system" value="$(var coordinate_system)"/>
       <arg name="use_gnss_ins_orientation" value="true"/>
 
       <arg name="gnss_frame" value="gnss_link"/>