= [
("pos_valid", ctypes.c_uint16),
("pos_x", ctypes.c_float),
("pos_y", ctypes.c_float),
("cartesian_valid", ctypes.c_uint16),
("cartesian_x", ctypes.c_int32),
("cartesian_y", ctypes.c_int32),
("polar_valid", ctypes.c_uint16),
("polar_dist", ctypes.c_uint32),
("polar_phi", ctypes.c_uint32),
("opt_valid", ctypes.c_uint16),
("opt_local_id", ctypes.c_uint16),
("opt_global_id", ctypes.c_uint16),
("opt_type", ctypes.c_uint8),
("opt_subtype", ctypes.c_uint16),
("opt_quality", ctypes.c_uint16),
("opt_timestamp", ctypes.c_uint32),
("opt_size", ctypes.c_uint16),
("opt_hitcount", ctypes.c_uint16),
("opt_meanecho", ctypes.c_uint16),
("opt_startindex", ctypes.c_uint16),
("opt_endindex", ctypes.c_uint16),
("opt_timestamp_sec", ctypes.c_uint32),
("opt_timestamp_nsec", ctypes.c_uint32)
]