diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/rtkrcv/RtkrcvManager.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/rtkrcv/RtkrcvManager.java
index 0007429b..a14ed35e 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/rtkrcv/RtkrcvManager.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/rtkrcv/RtkrcvManager.java
@@ -54,9 +54,7 @@ public class RtkrcvManager {
                 Double geo = dev.getGeoidSeparation()==null?0.0:dev.getGeoidSeparation();
                 try{ beidouClient.onRtkGngga(deviceId, lat, lon, alt, geo); }catch(Exception ignore){}
                 if(!(lat==0.0 && lon==0.0 && alt==0.0)){
-                    if(profile.getOut_height()==null || profile.getOut_height().isEmpty()){
-                        profile.setOut_height(geo==0.0?"ellipsoidal":"geodetic");
-                    }
+                    profile.setOut_height(geo==0.0?"ellipsoidal":"geodetic");
                 } else {
                     retHint = "all_zero";
                 }
@@ -151,7 +149,9 @@ public class RtkrcvManager {
         }
 
         template = replaceLine(template, "pos1-posmode", profile.getPos1_posmode());
-        template = replaceLine(template, "out-height", profile.getOut_height());
+        if(profile.getOut_height()!=null && !profile.getOut_height().isEmpty()){
+            template = replaceLine(template, "out-height", profile.getOut_height());
+        }
         template = replaceLine(template, "inpstr1-type", profile.getInpstr1_type());
         if(profile.getInpstr1_path()!=null) template = replaceLine(template, "inpstr1-path", profile.getInpstr1_path());
         if(group.getInpstr2_path()!=null) template = replaceLine(template, "inpstr2-path", group.getInpstr2_path());