A polar orbit is a type of orbit in which a satellite passes over the Earth's poles. In this orbit, the satellite travels in a north-south direction, allowing it to observe or image the entire surface of the Earth over time as the planet rotates beneath it. This type of orbit is particularly useful for Earth observation, reconnaissance, and environmental monitoring because it enables satellites to cover every part of the Earth with regular revisits.
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An orbit passing near both geographic poles of its central body. Planetary rotation brings different longitudes beneath successive passes, useful for global remote sensing; one satellite still samples each location intermittently.