成员的完整列表，这些成员属于 apollo::drivers::gnss::Heading,包括所有继承而来的类成员

baseline_length	apollo::drivers::gnss::Heading
extended_solution_status	apollo::drivers::gnss::Heading
galileo_beidou_sig_mask	apollo::drivers::gnss::Heading
gps_glonass_sig_mask	apollo::drivers::gnss::Heading
header	apollo::drivers::gnss::Heading
heading	apollo::drivers::gnss::Heading
heading_std_dev	apollo::drivers::gnss::Heading
measurement_time	apollo::drivers::gnss::Heading
pitch	apollo::drivers::gnss::Heading
pitch_std_dev	apollo::drivers::gnss::Heading
position_type	apollo::drivers::gnss::Heading
reserved	apollo::drivers::gnss::Heading
satellite_number_multi	apollo::drivers::gnss::Heading
satellite_number_obs	apollo::drivers::gnss::Heading
satellite_soulution_number	apollo::drivers::gnss::Heading
satellite_tracked_number	apollo::drivers::gnss::Heading
solution_source	apollo::drivers::gnss::Heading
solution_status	apollo::drivers::gnss::Heading
station_id	apollo::drivers::gnss::Heading