In TDMA (Time Division Multiple Access) satellite systems, all earth stations must be precisely synchronized. What is the primary challenge this creates?
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A
Propagation delay variations require burst timing adjustments to prevent overlap at the satellite
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B
All stations must transmit at identical power levels regardless of distance
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C
The satellite must buffer all bursts and retransmit them sequentially
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D
Each station requires a separate transponder to avoid timing conflicts