syntax = "proto2"; package sensor_msgs.msgs; message SITLGps { required uint64 time_usec = 1; optional uint64 time_utc_usec = 2; required double latitude_deg = 3; required double longitude_deg = 4; required double altitude = 5; optional double eph = 6; optional double epv = 7; optional double velocity = 8; optional double velocity_east = 9; optional double velocity_north = 10; optional double velocity_up = 11; }