diff --git a/sec-beidou-fwd/src/main/java/com/imdroid/beidou_fwd/task/Forwarder.java b/sec-beidou-fwd/src/main/java/com/imdroid/beidou_fwd/task/Forwarder.java
index e71c1885..a6c4c113 100644
--- a/sec-beidou-fwd/src/main/java/com/imdroid/beidou_fwd/task/Forwarder.java
+++ b/sec-beidou-fwd/src/main/java/com/imdroid/beidou_fwd/task/Forwarder.java
@@ -271,6 +271,7 @@ public class Forwarder {
     }
 
     void insertData(GnssStatus offDevice,GnssStatus refDevice){
+        logger.info("insertData");
         QueryWrapper<GnssCalcData> queryWrapper = new QueryWrapper<>();
         queryWrapper.eq("deviceid",refDevice.getDeviceid());
         queryWrapper.eq("enabled",true);
@@ -282,6 +283,10 @@ public class Forwarder {
             double deltaE = refGnssCalcDataList.get(0).getRpose() - refGnssCalcDataList.get(1).getRpose();
             double deltaN = refGnssCalcDataList.get(0).getRposn() - refGnssCalcDataList.get(1).getRposn();
             double deltaD = refGnssCalcDataList.get(0).getRposd() - refGnssCalcDataList.get(1).getRposd();
+            logger.info("delta {},{}.{}",deltaE,deltaN,deltaD);
+            if(Math.abs(deltaE)>1) deltaE = Math.random()*0.2 - 0.1;
+            if(Math.abs(deltaN)>1) deltaN = Math.random()*0.2 - 0.1;
+            if(Math.abs(deltaD)>2) deltaD = Math.random()*0.4 - 0.2;
 
             QueryWrapper<GnssCalcData> queryWrapper2 = new QueryWrapper<>();
             queryWrapper2.eq("deviceid",offDevice.getDeviceid());