#flight tracking
- Altigraph — An automatic recording instrument (barographic altimeter) used in aviation and meteorology to continuously measure and graphically trace on a chart the altitude variations of an aircraft or a weather balloon based on changes in atmospheric pressure.
- Astronavigation — The science, technique, or method of guiding and determining the position, trajectory, and speed of a vehicle (maritime ship, aircraft, or spacecraft) through astronomical observations performed on celestial bodies (Sun, Moon, stars, or reference planets). In the context of modern spaceflight, it represents an essential pillar of astrodynamics, utilizing stable optical sensors (star trackers) for the autonomous orientation of interplanetary probes when ground guidance signals are unavailable.