diff --git a/telemetry/telemetry.c b/telemetry/telemetry.c
index 7ee033a..ba98edb 100644
--- a/telemetry/telemetry.c
+++ b/telemetry/telemetry.c
@@ -54,6 +54,12 @@ static void telemetry_build_msg_vehicle_id
     );
 
 
+static void telemetry_build_msg_calibration
+    (
+    TELEMETRY_MESSAGE* msg_buf
+    );
+
+
 static void telemetry_build_msg_dashboard_dump
     (
     TELEMETRY_MESSAGE* msg_buf
@@ -85,11 +91,16 @@ void telemetry_get_next_message
 TELEMETRY_MESSAGE_TYPES msg_type;
 
 /* Determine which payload to send */
-if( ( message_idx % 2 == 0 )
+if( ( message_idx % 3 == 0 )
     && ( get_fc_state() == FC_STATE_LAUNCH_DETECT ) )
     {
     msg_type = TELEMETRY_MSG_VEHICLE_ID;
     }
+else if( ( message_idx % 3 == 1 )
+    && ( get_fc_state() == FC_STATE_LAUNCH_DETECT ) )
+    {
+    msg_type = TELEMETRY_MSG_CALIBRATION;
+    }
 else
     {
     msg_type = TELEMETRY_MSG_DASHBOARD_DATA;
@@ -137,6 +148,11 @@ switch( message_type )
         telemetry_build_msg_dashboard_dump(msg_buf);
         break;
         }
+    case TELEMETRY_MSG_CALIBRATION:
+        {
+        telemetry_build_msg_calibration(msg_buf);
+        break;
+        }
     default:
         {
         error_fail_fast( ERROR_RECORD_FLIGHT_EVENTS_ERROR );
@@ -195,6 +211,46 @@ strncpy( msg_buf->payload.vehicle_id.flight_id, "AVIONICS_TEST", 16 );
 } /* telemetry_build_msg_vehicle_id */
 
 
+/*********************************************************************************
+*                                                                                *
+* FUNCTION:                                                                      * 
+* 		telemetry_build_msg_calibration                                          *
+*                                                                                *
+* DESCRIPTION:                                                                   * 
+* 		Build the calibration payload. Assume header is filled by caller.        *
+*                                                                                *
+*********************************************************************************/
+static void telemetry_build_msg_calibration
+    (
+    TELEMETRY_MESSAGE* msg_buf
+    )
+{
+/*------------------------------------------------------------------------------ 
+ Local Variables                                    
+------------------------------------------------------------------------------*/
+SENSOR_DATA qfe_sensor_data;
+
+memset( &qfe_sensor_data, 0, sizeof( SENSOR_DATA ) );
+
+/*------------------------------------------------------------------------------ 
+ Construct known elements from preset data                                      
+------------------------------------------------------------------------------*/
+msg_buf->payload.calibration.imu_offset = preset_data.imu_offset;
+msg_buf->payload.calibration.baro_preset = preset_data.baro_preset;
+msg_buf->payload.calibration.servo_preset = preset_data.servo_preset;
+
+/*------------------------------------------------------------------------------ 
+ Determine QFE reference elevation
+------------------------------------------------------------------------------*/
+qfe_sensor_data.baro_pressure = preset_data.baro_preset.baro_pres;
+qfe_sensor_data.baro_temp = preset_data.baro_preset.baro_temp;
+sensor_baro_alt( &qfe_sensor_data );
+
+msg_buf->payload.calibration.qfe_elevation = qfe_sensor_data.baro_alt;
+
+} /* telemetry_build_msg_calibration */
+
+
 /*********************************************************************************
 *                                                                                *
 * FUNCTION:                                                                      * 
diff --git a/telemetry/telemetry.h b/telemetry/telemetry.h
index 38b1959..b6f5724 100644
--- a/telemetry/telemetry.h
+++ b/telemetry/telemetry.h
@@ -75,6 +75,7 @@ typedef enum _TELEMETRY_MESSAGE_TYPES
     {
     TELEMETRY_MSG_VEHICLE_ID = 0x00000001,
     TELEMETRY_MSG_DASHBOARD_DATA = 0x00000002,
+    TELEMETRY_MSG_CALIBRATION = 0x00000003,
     __TELEMETRY_MSG_FORCE_32BIT = 0xFFFFFFFF /* used to force this type size to 32 bits */
     } TELEMETRY_MESSAGE_TYPES;
     _Static_assert( sizeof(TELEMETRY_MESSAGE_TYPES) == 4, "TELEMETRY_MESSAGE_TYPES size invalid.");
@@ -115,6 +116,15 @@ typedef struct __attribute__((packed)) _TELEMETRY_MSG_DASHBOARD_DUMP_TYPE
     } TELEMETRY_MSG_DASHBOARD_DUMP_TYPE;
     _Static_assert( sizeof(TELEMETRY_MSG_DASHBOARD_DUMP_TYPE) == LORA_PAYLOAD_SIZE, "TELEMETRY_MSG_DASHBOARD_DUMP_TYPE size invalid.");
 
+typedef struct __attribute__((packed)) _TELEMETRY_MSG_CALIBRATION_TYPE
+    {
+    IMU_OFFSET imu_offset;
+    BARO_PRESET baro_preset;
+    float       qfe_elevation;
+    SERVO_PRESET servo_preset;
+    } TELEMETRY_MSG_CALIBRATION_TYPE;
+    _Static_assert( sizeof(TELEMETRY_MSG_CALIBRATION_TYPE) == LORA_PAYLOAD_SIZE, "TELEMETRY_MSG_CALIBRATION size invalid." );
+
 /* struct is packed to inhibit padding */
 typedef struct __attribute__((packed)) _TELEMETRY_MESSAGE
 	{
@@ -123,6 +133,7 @@ typedef struct __attribute__((packed)) _TELEMETRY_MESSAGE
         {
         TELEMETRY_MSG_VEHICLE_ID_TYPE vehicle_id; /* provide information about the transmitting device */
         TELEMETRY_MSG_DASHBOARD_DUMP_TYPE dashboard_dump; /* gives vehicle state info (location, orientation) */
+        TELEMETRY_MSG_CALIBRATION_TYPE calibration;
         } payload;
 	} TELEMETRY_MESSAGE;
 	_Static_assert( sizeof(TELEMETRY_MESSAGE) == TELEMETRY_MESSAGE_SIZE, "LORA_PAYLOAD size invalid.");