matmatmatmat

17 ms·

151.
by matmatmatmat 6y ago
Not the OP. We have to clarify what you mean by "support multiple simultaneous beams". The SL receiver is half-duplex, so it can only send or receive at any given time, and, in theory anyway, it uses beamforming to communicate wit
152.
by matmatmatmat 6y ago
Except this is not what happens at all. Older, larger trees tend to have thicker bark, which lets them survive the fires, while clearing out the understory and ground level. Forest fires reset competition at the ground level while mostly ma
153.
by matmatmatmat 6y ago
Thanks for the ideas, they seem reasonable. In passing, I'd note that I don't think cell technology would work without LoS; also, there's no atmosphere to reflect off of. I guess if they're just thinking of some comm sys
154.
by matmatmatmat 6y ago
I'm a firm believer that, sometimes, chemicals are the right answer.
155.
by matmatmatmat 6y ago
Am I the only one wondering what the point of this is?
156.
by matmatmatmat 6y ago
> That’s ~$800/Gbit at 20Gbit/satellite and 30,000 satellites. This is pretty optimistic because the shells at different altitudes have overlapping beams and can not all use the same spectrum at the same time (OK, technically,
157.
by matmatmatmat 6y ago
> Show me a consumer grade VSAT that's using 16APSK/32APSK... Not that it matters, but, I could. > How many Mbps is that? Not a lot. So, e.g., Viasat offers 100 Mbps service. > the aggregate throughput capacity of a singl
158.
by matmatmatmat 6y ago
> the aggregate capacity of a 180 million dollar (construction plus launch cost) 6000 kg geostationary telecom satellite is less than two strands of fiber and a set of modern 100/200/400GbE coherent DWDM system line terminals.
159.
by matmatmatmat 6y ago
"... value of the assets already deployed in space..." But, what is that value? Of the ~ 800 SL satellites launched so far, about 5% have already deorbited. Of the remainder, all but 2 don't have inter-satellite links. The ot
160.
by matmatmatmat 6y ago
"Starlink, when ready for ordinary end user production use, will be an amazing improvement over cheap ($110-200/mo) consumer grade VSAT terminals. The physics and economics of launching 4000-6200 kg geostationary telecom satellite
161.
by matmatmatmat 6y ago
This might be pedantic, but there have been fatalities closely involving the Shinkansen: https://en.wikipedia.org/wiki/Shinkansen#Safety_record , though, no fatalities from derailments or other issues directly caused by
162.
by matmatmatmat 7y ago
That sounds reasonable. Thanks for the sourcing!
163.
by matmatmatmat 7y ago
Are you qualified to evaluated what makes a change large or small? Is it possible that a 5-10% change is actually "massive"?