The Register came out with this summary today:
https://www.theregister.com/2024/05/22/starlink_tcp_performance_evaluation/
Excerpt:
Using PING, he found "minimum latency changes regularly every 15
seconds" and surmised "It appears that this change correlates to the
Starlink user's terminal being assigned to a different satellite. That
implies that the user equipment 'tracks' each satellite for a
15-second interval, which corresponds to a tracking angle of 11
degrees of arc."
During those handovers, Huston observed some packet loss – and a
significant increase in latency. "The worst case in this data set is a
shift from 30ms to 80ms," he wrote. Further: "Within each 15-second
satellite tracking interval, the latency variation is relatively high.
The average variation of jitter between successive RTT intervals is
6.7ms. The latency spikes at handover impose an additional 30ms to
50ms indicating the presence of deep buffers in the system to
accommodate the transient issues associated with satellite handover."
Overall, Huston believes Starlink has "a very high jitter rate, a
packet drop rate of around one percent to two percent that is
unrelated to network congestion, and a latency profile that jumps
regularly every 15 seconds."
[No need to cc me in replies, I'll read them on the mailiing list.]
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