static void processFrameData(NatNetML.FrameOfMocapData data)
        {
            /*  Parsing Rigid Body Frame Data   */
            for (int i = 0; i < mRigidBodies.Count; i++)
            {
                int rbID = mRigidBodies[i].ID;              // Fetching rigid body IDs from the saved descriptions

                for (int j = 0; j < data.nRigidBodies; j++)
                {
                    if (rbID == data.RigidBodies[j].ID)                      // When rigid body ID of the descriptions matches rigid body ID of the frame data.
                    {
                        NatNetML.RigidBody     rb     = mRigidBodies[i];     // Saved rigid body descriptions
                        NatNetML.RigidBodyData rbData = data.RigidBodies[j]; // Received rigid body descriptions

                        if (rbData.Tracked == true)
                        {
                            Console.WriteLine("\tRigidBody ({0}):", rb.Name);
                            Console.WriteLine("\t\tpos ({0:N3}, {1:N3}, {2:N3})", rbData.x, rbData.y, rbData.z);

                            // Rigid Body Euler Orientation
                            float[] quat = new float[4] {
                                rbData.qx, rbData.qy, rbData.qz, rbData.qw
                            };
                            float[] eulers = new float[3];

                            eulers = NatNetClientML.QuatToEuler(quat, NATEulerOrder.NAT_XYZr); //Converting quat orientation into XYZ Euler representation.
                            double xrot = RadiansToDegrees(eulers[0]);
                            double yrot = RadiansToDegrees(eulers[1]);
                            double zrot = RadiansToDegrees(eulers[2]);

                            Console.WriteLine("\t\tori ({0:N3}, {1:N3}, {2:N3})", xrot, yrot, zrot);
                        }
                        else
                        {
                            Console.WriteLine("\t{0} is not tracked in current frame", rb.Name);
                        }
                    }
                }
            }

            /* Parsing Skeleton Frame Data  */
            for (int i = 0; i < mSkeletons.Count; i++)      // Fetching skeleton IDs from the saved descriptions
            {
                int sklID = mSkeletons[i].ID;

                for (int j = 0; j < data.nSkeletons; j++)
                {
                    if (sklID == data.Skeletons[j].ID)                     // When skeleton ID of the description matches skeleton ID of the frame data.
                    {
                        NatNetML.Skeleton     skl     = mSkeletons[i];     // Saved skeleton descriptions
                        NatNetML.SkeletonData sklData = data.Skeletons[j]; // Received skeleton frame data

                        Console.WriteLine("\tSkeleton ({0}):", skl.Name);
                        Console.WriteLine("\t\tSegment count: {0}", sklData.nRigidBodies);

                        /*  Now, for each of the skeleton segments  */
                        for (int k = 0; k < sklData.nRigidBodies; k++)
                        {
                            NatNetML.RigidBodyData boneData = sklData.RigidBodies[k];

                            /*  Decoding skeleton bone ID   */
                            int skeletonID  = HighWord(boneData.ID);
                            int rigidBodyID = LowWord(boneData.ID);
                            int uniqueID    = skeletonID * 1000 + rigidBodyID;
                            int key         = uniqueID.GetHashCode();

                            NatNetML.RigidBody bone = (RigidBody)mHtSkelRBs[key];   //Fetching saved skeleton bone descriptions

                            //Outputting only the hip segment data for the purpose of this sample.
                            if (k == 0)
                            {
                                Console.WriteLine("\t\t{0:N3}: pos({1:N3}, {2:N3}, {3:N3})", bone.Name, boneData.x, boneData.y, boneData.z);
                            }
                        }
                    }
                }
            }

            /*  Parsing Force Plate Frame Data  */
            for (int i = 0; i < mForcePlates.Count; i++)
            {
                int fpID = mForcePlates[i].ID;                  // Fetching force plate IDs from the saved descriptions

                for (int j = 0; j < data.nForcePlates; j++)
                {
                    if (fpID == data.ForcePlates[j].ID)                       // When force plate ID of the descriptions matches force plate ID of the frame data.
                    {
                        NatNetML.ForcePlate     fp     = mForcePlates[i];     // Saved force plate descriptions
                        NatNetML.ForcePlateData fpData = data.ForcePlates[i]; // Received forceplate frame data

                        Console.WriteLine("\tForce Plate ({0}):", fp.Serial);

                        // Here we will be printing out only the first force plate "subsample" (index 0) that was collected with the mocap frame.
                        for (int k = 0; k < fpData.nChannels; k++)
                        {
                            Console.WriteLine("\t\tChannel {0}: {1}", fp.ChannelNames[k], fpData.ChannelData[k].Values[0]);
                        }
                    }
                }
            }
            Console.WriteLine("\n");
        }
        //static uint GPS_LEAPSECONDS_MILLIS = 18000;

        static void processFrameData(NatNetML.FrameOfMocapData data)
        {
            bool data_gogo = true;

            /*  Parsing Rigid Body Frame Data   */
            for (int i = 0; i < mRigidBodies.Count; i++)
            {
                int rbID = mRigidBodies[i].ID;              // Fetching rigid body IDs from the saved descriptions

                for (int j = 0; j < data.nRigidBodies; j++)
                {
                    if (rbID == data.RigidBodies[j].ID)                      // When rigid body ID of the descriptions matches rigid body ID of the frame data.
                    {
                        NatNetML.RigidBody     rb     = mRigidBodies[i];     // Saved rigid body descriptions
                        NatNetML.RigidBodyData rbData = data.RigidBodies[j]; // Received rigid body descriptions

                        if (rbData.Tracked == true)
                        {
#if DEBUG_MSG
                            Console.WriteLine("\tRigidBody ({0}):", rb.Name);
                            Console.WriteLine("\t\tpos ({0:N3}, {1:N3}, {2:N3})", rbData.x, rbData.y, rbData.z);

                            // Rigid Body Euler Orientation
                            float[] quat = new float[4] {
                                rbData.qx, rbData.qy, rbData.qz, rbData.qw
                            };
                            float[] eulers = new float[3];

                            eulers = NatNetClientML.QuatToEuler(quat, NATEulerOrder.NAT_XYZr); //Converting quat orientation into XYZ Euler representation.
                            double xrot = RadiansToDegrees(eulers[0]);
                            double yrot = RadiansToDegrees(eulers[1]);
                            double zrot = RadiansToDegrees(eulers[2]);
                            Console.WriteLine("\t\tori ({0:N3}, {1:N3}, {2:N3})", xrot, yrot, zrot);
#endif
                            if (drones.ContainsKey(rb.Name))
                            {
                                DroneData drone = drones[rb.Name];
                                drone.lost_count = 0;
                                long cur_ms = stopwatch.ElapsedMilliseconds;
                                if (drone.send_count > 0)
                                {
                                    drone.send_count--;
                                }
                                else if (data_gogo)
                                {
                                    drone.send_count = 10;
                                    data_gogo        = false;
                                    MAVLink.mavlink_att_pos_mocap_t att_pos = new MAVLink.mavlink_att_pos_mocap_t();
                                    att_pos.time_usec = (ulong)(cur_ms * 1000);
                                    att_pos.x         = rbData.x;  //north
                                    att_pos.y         = rbData.z;  //east
                                    att_pos.z         = -rbData.y; //down
                                    att_pos.q         = new float[4] {
                                        rbData.qw, rbData.qx, rbData.qz, -rbData.qy
                                    };
                                    byte[] pkt = mavlinkParse.GenerateMAVLinkPacket10(MAVLink.MAVLINK_MSG_ID.ATT_POS_MOCAP, att_pos);

                                    if (drone.lastTime >= 0)
                                    {
                                        MAVLink.mavlink_vision_speed_estimate_t vis_speed = new MAVLink.mavlink_vision_speed_estimate_t();
                                        float total_s = (cur_ms - drone.lastTime) * 0.001f;
                                        vis_speed.x    = (rbData.x - drone.lastPosN) / total_s;
                                        vis_speed.y    = (rbData.z - drone.lastPosE) / total_s;
                                        vis_speed.z    = (-rbData.y - drone.lastPosD) / total_s;
                                        vis_speed.usec = (ulong)(cur_ms * 1000);
                                        byte[] pkt2      = mavlinkParse.GenerateMAVLinkPacket10(MAVLink.MAVLINK_MSG_ID.VISION_SPEED_ESTIMATE, vis_speed);
                                        int    total_len = pkt.Length + pkt2.Length;
                                        byte[] uwb_data  = new byte[10 + total_len + 1];
                                        uwb_data[0] = 0x54;
                                        uwb_data[1] = 0xf1;
                                        uwb_data[2] = 0xff;
                                        uwb_data[3] = 0xff;
                                        uwb_data[4] = 0xff;
                                        uwb_data[5] = 0xff;
                                        uwb_data[6] = 2;
                                        uwb_data[7] = drone.uwb_tag_id;
                                        uwb_data[8] = (byte)(total_len & 0xff);
                                        uwb_data[9] = (byte)(total_len >> 16);
                                        Array.Copy(pkt, 0, uwb_data, 10, pkt.Length);
                                        Array.Copy(pkt2, 0, uwb_data, 10 + pkt.Length, pkt2.Length);
                                        byte chk_sum = 0;
                                        foreach (byte uwb_data_byte in uwb_data)
                                        {
                                            chk_sum += uwb_data_byte;
                                        }
                                        uwb_data[uwb_data.Length - 1] = chk_sum;
                                        mavSock.SendTo(uwb_data, drone.ep);
                                    }
                                }
                                drone.lastTime = cur_ms;
                                drone.lastPosN = rbData.x;
                                drone.lastPosE = rbData.z;
                                drone.lastPosD = -rbData.y;
                            }
                        }
                        else
                        {
                            Console.WriteLine("\t{0} is not tracked in current frame", rb.Name);

                            /*if (drones.ContainsKey(rb.Name))
                             * {
                             *  DroneData drone = drones[rb.Name];
                             *  drone.lost_count++;
                             *  if (drone.lost_count > 3)
                             *  {
                             *      drone.lost_count = 0;
                             *      MAVLink.mavlink_gps_input_t gps_input = new MAVLink.mavlink_gps_input_t();
                             *      gps_input.gps_id = 0;
                             *      gps_input.fix_type = (byte)MAVLink.GPS_FIX_TYPE.NO_FIX;
                             *      byte[] pkt = mavlinkParse.GenerateMAVLinkPacket10(MAVLink.MAVLINK_MSG_ID.GPS_INPUT, gps_input);
                             *      mavSock.SendTo(pkt, drone.ep);
                             *  }
                             * }*/
                        }
                    }
                }
            }

            /* Parsing Skeleton Frame Data  */
            for (int i = 0; i < mSkeletons.Count; i++)      // Fetching skeleton IDs from the saved descriptions
            {
                int sklID = mSkeletons[i].ID;

                for (int j = 0; j < data.nSkeletons; j++)
                {
                    if (sklID == data.Skeletons[j].ID)                     // When skeleton ID of the description matches skeleton ID of the frame data.
                    {
                        NatNetML.Skeleton     skl     = mSkeletons[i];     // Saved skeleton descriptions
                        NatNetML.SkeletonData sklData = data.Skeletons[j]; // Received skeleton frame data

                        Console.WriteLine("\tSkeleton ({0}):", skl.Name);
                        Console.WriteLine("\t\tSegment count: {0}", sklData.nRigidBodies);

                        /*  Now, for each of the skeleton segments  */
                        for (int k = 0; k < sklData.nRigidBodies; k++)
                        {
                            NatNetML.RigidBodyData boneData = sklData.RigidBodies[k];

                            /*  Decoding skeleton bone ID   */
                            int skeletonID  = HighWord(boneData.ID);
                            int rigidBodyID = LowWord(boneData.ID);
                            int uniqueID    = skeletonID * 1000 + rigidBodyID;
                            int key         = uniqueID.GetHashCode();

                            NatNetML.RigidBody bone = (RigidBody)mHtSkelRBs[key];   //Fetching saved skeleton bone descriptions

                            //Outputting only the hip segment data for the purpose of this sample.
                            if (k == 0)
                            {
                                Console.WriteLine("\t\t{0:N3}: pos({1:N3}, {2:N3}, {3:N3})", bone.Name, boneData.x, boneData.y, boneData.z);
                            }
                        }
                    }
                }
            }

            /*  Parsing Force Plate Frame Data  */
            for (int i = 0; i < mForcePlates.Count; i++)
            {
                int fpID = mForcePlates[i].ID;                  // Fetching force plate IDs from the saved descriptions

                for (int j = 0; j < data.nForcePlates; j++)
                {
                    if (fpID == data.ForcePlates[j].ID)                       // When force plate ID of the descriptions matches force plate ID of the frame data.
                    {
                        NatNetML.ForcePlate     fp     = mForcePlates[i];     // Saved force plate descriptions
                        NatNetML.ForcePlateData fpData = data.ForcePlates[i]; // Received forceplate frame data

                        Console.WriteLine("\tForce Plate ({0}):", fp.Serial);

                        // Here we will be printing out only the first force plate "subsample" (index 0) that was collected with the mocap frame.
                        for (int k = 0; k < fpData.nChannels; k++)
                        {
                            Console.WriteLine("\t\tChannel {0}: {1}", fp.ChannelNames[k], fpData.ChannelData[k].Values[0]);
                        }
                    }
                }
            }
#if DEBUG_MSG
            Console.WriteLine("\n");
#endif
        }