Re: [Starlink] Starlink deplyment in Ukraine

[Sebastian Moeller <moeller0@gmx.de>]

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UUCP?

On 7 March 2022 18:34:11 CET, Ben Greear <greearb@candelatech.com> wrote:
>On 3/6/22 1:10 PM, David P. Reed wrote:
>> Very interesting info about where current ground stations are, but of course Kyiv, Lviv, Kharkiv are close to some adjacent countries that already have Starlink 
>> ground stations (didn't know they were up and running in Turkey).
>> 
>> Regarding ground-level repeating, the radio horizon is very short except in VHF where you can in principle bounce off the ionosphere. Don't join the Flat Earth 
>> Society, the earth isn't very flat at all.
>> 
>> (yes, some small bands actually bend around the earth in the Troposhere, but bitrates feasible in that bandwidth is very poor. Maybe voice grade)
>> 
>> Microwave multihop links require LOS and except from mountaintop to mountaintop, it's hard to maintain them cheaply - Wall St uses microwaves between NYC and 
>> Chicago, because the latency is much lower number of microseconds than direct fiber would be (little known fact about the difference between speed of light in 
>> glass vs. air).
>> 
>> These technologies are "off the shelf" for fixed wireless deployment, but if I were trying to maintain or build a quick replacement for existing cables using 
>> wireless, I suspect it would largely be too little, too late.
>
>For email, and anything else that can be stored and forwarded, you should be able to zig-zag from ground to sky to ground,
>but it would take specialized software setup on the ground intermediate hops (something like bittorrent and/or an email
>proxy I guess), and it would require the sky to be able to hair-pin ground-to-ground.  So, a bit of work, but hopefully is
>software-only fix.
>
>For instance:  Ground-east-1 <-> sky-to-the-west <-> ground-middle <-> sky-more-to-the-west <-> internet-ground-station-to-the-west
>And maybe it is not directly due west due to orbital mechanics, but I think you get the idea.
>
>Latency would be in minutes or maybe hours, but that is still a lot better than nothing.
>
>Thanks,
>Ben
>
>-- 
>Ben Greear <greearb@candelatech.com>
>Candela Technologies Inc  http://www.candelatech.com
>
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-- 
Sent from my Android device with K-9 Mail. Please excuse my brevity.

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