A note for the programmers who maintain the telemetry code / specification. I found a handful off issues in the specs as posted here:
The Packet Types table should have the uint32 type;
The field m_frameIdentifier in the PacketHeader struct should be changed from uint to uint32;
In struct PacketMotionData: , the fields m_angularAccelerationX, m_angularAccelerationY, and m_angularAccelerationZ have incorrect comments. The comments should be fixed to reflect that the values represent accelerations rather than velocities;
In struct CarSetupData: the comment of field m_rearAntiRollBar should refer to rear instead of front;
In the Driver IDs appendix: the name of driver 34 Wilheim Kaufmann should be fixed to to Wilhelm Kaufmann, that's his name when he's encountered in-game.
Hope this helps!