@Zarya_Info I can't find the Chinese polar weather sat FY-3A in your list (http://www.zarya.info/Diaries/Launches/ss-LTDN.php …) - where is it?
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@Cosmic_Penguin Orbit is not sun-synchronous, LTDN drifting +30 mins/year and accelerating
@Zarya_Info The 5 yrs old weather sat must be in really bad shape then to do so - FY-3C should be launched soon to replace it.
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@Cosmic_Penguin 3A is OK, SS orbits are designed for the mission, aim is to keep orbit within specification for design life of satellite -
@Cosmic_Penguin Gravity is not the best of friends to sun-synch orbits because of the fixed alignment with the Sun
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