Earlier quoted context omitted.
> it was confirmed that this satellite had extraordinarily high communications bandwidth and was speculated to be used either for SIGINT or for operating UAVs. Given that the recently launched civillian satellite Viasat-2 has a bandwidth of 300Gb/s and a reported expected latency of about 25ms, its not hard to imagine that a classified satellite like this may have crazy high bandwidth and low latency, perfect for rec…
Not sure where you got the 25ms number from. Viasat-2 is in geostationary orbit at 35000km. The roundtrip speed of light delay alone is 240ms.
EDIT: Haven’t found the source. I did find that the existing ViaSat-1 latency (on Exede, and actual ping times not satellite->ground latency) is 600 to 700ms, so that’s roughly in line with what you said. Exede do a bunch of latency compensation where they can so people often report lower latency, but for eg online games that obviously won’t work.
I also know that what I read before was specific to airplane in-flight internet, although I doubt commercial flight altitude make any difference to latency, so that’s likely an irrelevant point.