60 ms cross-continent

Sat Jun 20 16:43:10 UTC 2020

And of course in your more realistic example:

2742 miles = 4412 km ~ 44 ms optical rtt with no OEO in the path

On Sat, Jun 20, 2020 at 12:36 PM Tim Durack <tdurack at gmail.com> wrote:

> Speed of light in glass ~200 km/s
>
> 100 km rtt = 1ms
>
> Coast-to-coast ~6000 km ~60ms
>
> Tim:>
>
> On Sat, Jun 20, 2020 at 12:27 PM William Herrin <bill at herrin.us> wrote:
>
>> Howdy,
>>
>> Why is latency between the east and west coasts so bad? Speed of light
>> accounts for about 15ms each direction for a 30ms round trip. Where
>> does the other 30ms come from and why haven't we gotten rid of it?
>>
>> c = 186,282 miles/second
>> 2742 miles from Seattle to Washington DC mainly driving I-90
>>
>> 2742/186282 ~= 0.015 seconds
>>
>> Thanks,
>> Bill Herrin
>>
>> --
>> William Herrin
>> bill at herrin.us
>> https://bill.herrin.us/
>>
>
>
> --
> Tim:>
>

-- 
Tim:>
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