diff --git a/aip_x1_launch/launch/gnss.launch.xml b/aip_x1_launch/launch/gnss.launch.xml
index bf71290d..98a2ba37 100644
--- a/aip_x1_launch/launch/gnss.launch.xml
+++ b/aip_x1_launch/launch/gnss.launch.xml
@@ -2,7 +2,6 @@
 
   <arg name="use_gnss" default="false" />
   <arg name="launch_driver" default="true" />
-  <arg name="coordinate_system" default="1" description="0:UTM, 1:MGRS, 2:PLANE" />
 
   <group if="$(var use_gnss)">
     <push-ros-namespace namespace="gnss"/>
@@ -22,7 +21,6 @@
       <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_ublox_receiver" value="true" />
 
       <arg name="gnss_frame" value="gnss_link" />
diff --git a/aip_x2_launch/launch/gnss.launch.xml b/aip_x2_launch/launch/gnss.launch.xml
index 408a6f2c..759aecae 100644
--- a/aip_x2_launch/launch/gnss.launch.xml
+++ b/aip_x2_launch/launch/gnss.launch.xml
@@ -1,7 +1,6 @@
 <launch>
 
   <arg name="launch_driver" default="true" />
-  <arg name="coordinate_system" default="1" description="0:UTM, 1:MGRS, 2:PLANE" />
 
   <group>
     <push-ros-namespace namespace="gnss"/>
@@ -23,7 +22,6 @@
       <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_ublox_receiver" value="true" />
 
       <arg name="gnss_frame" value="gnss_link" />
diff --git a/aip_xx1_launch/launch/gnss.launch.xml b/aip_xx1_launch/launch/gnss.launch.xml
index 6a44b15a..b8d8b6d6 100644
--- a/aip_xx1_launch/launch/gnss.launch.xml
+++ b/aip_xx1_launch/launch/gnss.launch.xml
@@ -2,7 +2,6 @@
 
   <arg name="launch_driver" default="true" />
   <arg name="gnss_receiver" default="ublox" description="ublox(default) or septentrio"/>
-  <arg name="coordinate_system" default="1" description="0:UTM, 1:MGRS, 2:PLANE" />
 
   <group>
     <push-ros-namespace namespace="gnss"/>
@@ -35,7 +34,6 @@
       <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_ublox_receiver" value="true" />
 
       <arg name="gnss_frame" value="gnss_link" />