Dear Hesham, May I ask for what reason do you need the satellites to be synchronized in time? What application is requiring this? Earth observation? Then, go for GNSS-based time synchronization, as done by EO satellites in LEO: https://navi.ion.org/content/69/3/navi.531
"GNSS signals could even be used for reliable navigation in lunar orbit", so also for time synchronization: https://www.nasa.gov/missions/tech-demonstration/nasa-navigation-tech-shows-timing-really-is-everything It seems that as long as your device can have a GNSS receiver, that's the best way to keep it time-synchronized. Is there anything preventing the use of GNSS on your intended application? https://lists.bufferbloat.net/pipermail/starlink/2024-March/002605.html Regards, David
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