| 1. | KH-11 satellites are in either of two standard planes in Sun-synchronous orbits.
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| 2. | It was launched into a Sun-synchronous orbit by NASA aboard an SLC-3W.
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| 3. | P78-1 was in a noon-midnight, Sun-synchronous orbit at 600 km altitude.
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| 4. | Such orbits are called dawn-dusk orbits, a type of Sun-synchronous orbit.
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| 5. | Sun-synchronous orbits can happen around other oblate planets, such as Mars.
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| 6. | It has been flying near the Mir in a synchronous orbit.
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| 7. | A non-sun-synchronous orbit ( magenta ) is also shown for reference.
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| 8. | SEASAT and ERS-1 are examples of satellites launched into sun-synchronous orbits for this reason.
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| 9. | This is due to a tidal locking or synchronous orbit.
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| 10. | Earth-observing satellites may also be launched into a sun-synchronous orbit, which is slightly retrograde.
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