px4-firmware/msg/pps_capture.msg

uint64 timestamp			  # time since system start (microseconds) at PPS capture event
uint64 rtc_timestamp		# Corrected GPS UTC timestamp at PPS capture event
Fix PPS based UTC timestamp in camera trigger and capture messages The existing implementation has about 100ms difference to a reference clock. With the changes this error less than 25us. - Use sensor_gps messages with hrt timestamps as RTC reference and not the system realtime clock. The PPS interrupt can then be aligned with the GPS clock system. - Keep fallback based on system RTC when no PPS pulse was captured 2021-11-11 06:05:03 -04:00			`uint64 timestamp # time since system start (microseconds) at PPS capture event`
			`uint64 rtc_timestamp # Corrected GPS UTC timestamp at PPS capture event`