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

extended_solution_status	apollo::drivers::gnss::novatel::Heading
galileo_beidou_sig_mask	apollo::drivers::gnss::novatel::Heading
gps_glonass_sig_mask	apollo::drivers::gnss::novatel::Heading
heading	apollo::drivers::gnss::novatel::Heading
heading_std_dev	apollo::drivers::gnss::novatel::Heading
length	apollo::drivers::gnss::novatel::Heading
num_sats_ele	apollo::drivers::gnss::novatel::Heading
num_sats_in_solution	apollo::drivers::gnss::novatel::Heading
num_sats_l2	apollo::drivers::gnss::novatel::Heading
num_sats_tracked	apollo::drivers::gnss::novatel::Heading
pitch	apollo::drivers::gnss::novatel::Heading
pitch_std_dev	apollo::drivers::gnss::novatel::Heading
position_type	apollo::drivers::gnss::novatel::Heading
reserved	apollo::drivers::gnss::novatel::Heading
solution_source	apollo::drivers::gnss::novatel::Heading
solution_status	apollo::drivers::gnss::novatel::Heading
station_id	apollo::drivers::gnss::novatel::Heading