Robert wrote: ↑Sun Dec 04, 2022 7:12 pm
Ken wrote: ↑Sun Dec 04, 2022 12:53 pm
Twitter is currently the 15th most popular social media platform in the world. There is nothing it does that can't be replicated by any other tech company with deep pockets.
It is not the technology but the client base that matters. Most US politicians and media use Twitter. Some it is their official social media source.
Ken wrote: ↑Sun Dec 04, 2022 12:53 pm
Starlink is very cool, but I don't see how it ever becomes more than just a niche product since land-based wireless service is always going to be much cheaper and easier and 99.99% of phone users don't care about whether they can get a signal or call someone in rural Congo or Antarctica. What people care about is phone size, battery life, screen size etc. They also want to be on the same system that all their friends and family are on. And any phone with a transmitter powerful enough to reach outer space is by definition going to be a lot bigger and have less battery life than a phone with a transmitter that only needs to reach the nearest cell tower 1/2 mile away.
Musk has already made an agreement with T Mobile to provide satellite access to their existing cell phones. There are a lot of rural places that phones will not work. With Starlink, they will now. All this is pretty much with existing tech. Starlink just needs to launch their 2.0 satellites. That is planned for 2023 with the success of their Starship launch.
Low orbit satellites are very effective and fast.
My concern is Elon Musk will have a very powerful place in space, industry and society. While I like what he does now, this does not mean I will always like it or trust it. We do need to be careful moving forward diversifying power.
This is still all vaporware.
Musk's existing Starlink satellites transmit and receive on 10.7 to 12.7 gigahertz frequencies. Cell phones work on completely different 900/1,800/1,900 MHz frequencies so it is impossible for the existing Starlink network to talk to existing cell phones, even if they could transmit that far.
Musk has to put up new satellites that transmit and receive on cell phone frequencies in order to talk to existing cell phones. None of his existing satellites will work. But he can't actually legally do that because he doesn't actually own any spectrum in the regular cell phone frequencies because the existing wireless providers long ago bought it all up during the spectrum auctions. So he has to partner with an existing wireless company like T-Mobile in order to have his satellites broadcast at cell phone frequencies. And he will probably have to do the same thing in every other country where he wants to transmit and receive using existing cell phone frequencies since cell phone spectrum has already been allocated across the planet to existing companies.
In any event, when you read the fine print of their announcement you find that they have most definitely not worked out all the technical issues related to existing cell phones talking to satellites. In fact their announcement says:
“We need to do more than reprogram the satellite; we’re making a special antenna, the most advanced phased array antennas in the world. They have to pick up a very quiet signal from your cell phone,” said Musk at the event. “There’s quite a bit of complex hardware and software, because it is moving so fast — they’re traveling overhead at 17,000 miles per hour. Normally a cell phone tower does not travel at 17,000 miles per hour.”
At first the service will only enable text messages, and possibly messaging apps, though Sievert warned that “we haven’t actually begun working with other companies… it’s a bit of a technical problem that we need help from the partner with.” There would probably also be a considerable delay of “half an hour or so” until the message is sent or received.
Half an hour lag time to send a text message? No ability to even make a voice call?
That doesn't sound like world-beating technology. You can do far better than that with existing Iridium and Immarat satellite phones that have been around for 25 years. And those are what most remote users such as ships at sea actually use today.