Another round of speculative-execution vulnerabilities

Another round of speculative-execution vulnerabilities

For a very clear example, a geostationary TV satellite is typically transmitting at 22 MHz or higher symbol rates; if the signal has to propagate all the way from the satellite to the receiver before the satellite can start the next symbol, then geostationary orbit has to be no higher than 14 meters above the satellite dish. In practice, everything is designed to handle this delay, and thus it's fine.

If you insist on two-way communication, Starlink's signal has been partially reversed engineered, and has a symbol time of 4.4 µs; this corresponds to 1.3 km path length in free space. And yet, a Starlink satellite is around 550 km above the Earth's surface, for a propagation delay of around 1,800 µs - significantly more than the symbol time.