code: func (m *SimState) Pack() []byte {
  	data := new(bytes.Buffer)
  	binary.Write(data, binary.LittleEndian, m.Q1)
  	binary.Write(data, binary.LittleEndian, m.Q2)
  	binary.Write(data, binary.LittleEndian, m.Q3)
  	binary.Write(data, binary.LittleEndian, m.Q4)
  	binary.Write(data, binary.LittleEndian, m.ROLL)
  	binary.Write(data, binary.LittleEndian, m.PITCH)
  	binary.Write(data, binary.LittleEndian, m.YAW)
  	binary.Write(data, binary.LittleEndian, m.XACC)
  	binary.Write(data, binary.LittleEndian, m.YACC)
  	binary.Write(data, binary.LittleEndian, m.ZACC)
  	binary.Write(data, binary.LittleEndian, m.XGYRO)
  	binary.Write(data, binary.LittleEndian, m.YGYRO)
  	binary.Write(data, binary.LittleEndian, m.ZGYRO)
  	binary.Write(data, binary.LittleEndian, m.LAT)
  	binary.Write(data, binary.LittleEndian, m.LON)
  	binary.Write(data, binary.LittleEndian, m.ALT)
  	binary.Write(data, binary.LittleEndian, m.STD_DEV_HORZ)
  	binary.Write(data, binary.LittleEndian, m.STD_DEV_VERT)
  	binary.Write(data, binary.LittleEndian, m.VN)
  	binary.Write(data, binary.LittleEndian, m.VE)
  	binary.Write(data, binary.LittleEndian, m.VD)
  	return data.Bytes()
  }
docs: // Pack returns a packed byte array which represents a SimState payload