diff --git a/libraries/DataFlash/LogFile.cpp b/libraries/DataFlash/LogFile.cpp
index f2989f4fdf..ee0a13b03f 100644
--- a/libraries/DataFlash/LogFile.cpp
+++ b/libraries/DataFlash/LogFile.cpp
@@ -1729,6 +1729,24 @@ void DataFlash_Class::Log_Write_EKF3(AP_AHRS_NavEKF &ahrs, bool optFlowEnabled)
             WriteBlock(&pkt10, sizeof(pkt10));
         }
     }
+    // write debug data for body frame odometry fusion
+    Vector3f velBodyInnov,velBodyInnovVar;
+    static uint32_t lastUpdateTime_ms = 0;
+    uint32_t updateTime_ms = ahrs.get_NavEKF3().getBodyFrameOdomDebug(-1, velBodyInnov, velBodyInnovVar);
+    if (updateTime_ms > lastUpdateTime_ms) {
+        struct log_ekfBodyOdomDebug pkt11 = {
+            LOG_PACKET_HEADER_INIT(LOG_XKFD_MSG),
+            time_us : time_us,
+            velInnovX : velBodyInnov.x,
+            velInnovY : velBodyInnov.y,
+            velInnovZ : velBodyInnov.z,
+            velInnovVarX : velBodyInnovVar.x,
+            velInnovVarY : velBodyInnovVar.y,
+            velInnovVarZ : velBodyInnovVar.z
+         };
+        WriteBlock(&pkt11, sizeof(pkt11));
+        updateTime_ms = lastUpdateTime_ms;
+    }
 }
 #endif
 
diff --git a/libraries/DataFlash/LogStructure.h b/libraries/DataFlash/LogStructure.h
index 159041a029..962a9cd370 100644
--- a/libraries/DataFlash/LogStructure.h
+++ b/libraries/DataFlash/LogStructure.h
@@ -418,6 +418,17 @@ struct PACKED log_RngBcnDebug {
     int16_t posD;           // Down position of receiver rel to EKF origin (cm)
 };
 
+struct PACKED log_ekfBodyOdomDebug {
+    LOG_PACKET_HEADER;
+    uint64_t time_us;
+    float velInnovX;
+    float velInnovY;
+    float velInnovZ;
+    float velInnovVarX;
+    float velInnovVarY;
+    float velInnovVarZ;
+};
+
 struct PACKED log_Cmd {
     LOG_PACKET_HEADER;
     uint64_t time_us;
@@ -936,6 +947,8 @@ Format characters in the format string for binary log messages
       "XKF0","QBccCCcccccccc","TimeUS,ID,rng,innov,SIV,TR,BPN,BPE,BPD,OFH,OFL,OFN,OFE,OFD" }, \
     { LOG_XKQ1_MSG, sizeof(log_Quaternion), "XKQ1", QUAT_FMT, QUAT_LABELS }, \
     { LOG_XKQ2_MSG, sizeof(log_Quaternion), "XKQ2", QUAT_FMT, QUAT_LABELS }, \
+    { LOG_XKFD_MSG, sizeof(log_ekfBodyOdomDebug), \
+      "XKFD","Qffffff","TimeUS,IX,IY,IZ,IVX,IVY,IVZ" }, \
     { LOG_TERRAIN_MSG, sizeof(log_TERRAIN), \
       "TERR","QBLLHffHH","TimeUS,Status,Lat,Lng,Spacing,TerrH,CHeight,Pending,Loaded" }, \
     { LOG_GPS_UBX1_MSG, sizeof(log_Ubx1), \
@@ -1135,6 +1148,7 @@ enum LogMessages {
     LOG_XKF10_MSG,
     LOG_XKQ1_MSG,
     LOG_XKQ2_MSG,
+    LOG_XKFD_MSG,
     LOG_DF_MAV_STATS,
 
     LOG_MSG_SBPHEALTH,