T**********e
发帖数: 29576 | 1 SpaceX制造发射几百个近地卫星（750哩)，因为轨道低信号速度比同步卫星要快，而且
因为光速在真空里比光纤里快40%，最终网络速度要超过现有地面网。
以后扩大系统，信号可以达到火星殖民地。
Elon Musk's Plan to Build a Space Internet
Musk is tonight hosting a SpaceX event in Seattle, where the company is
opening a new office. The talk will mostly be about SpaceX’s plans for
hiring aerospace and software engineers in the Pacific Northwest to boost
the company’s rocket-building efforts. But he'll also use the talk to
announce his newest idea, which would launch a vast network of communication
satellites to orbit earth. The network would do two things: speed up the
general flow of data on the Internet and deliver high-speed, low-cost
Internet services to the three billion-plus people who still have poor
access to the Web. “Our focus is on creating a global communications system
that would be larger than anything that has been talked about to date,”
Musk told Bloomberg Businessweek ahead of the announcement.
The Space Internet venture, to which Musk hasn’t yet given a name, would be
hugely ambitious. Hundreds of satellites would orbit about 750 miles above
earth, much closer than traditional communications satellites in
geosynchronous orbit at altitudes of up to 22,000 miles. The lower
satellites would make for a speedier Internet service, with less distance
for electromagnetic signals to travel. The lag in current satellite systems
makes applications such as Skype, online gaming, and other cloud-based
services tough to use. Musk’s service would, in theory, rival fiber optic
cables on land while also making the Internet available to remote and poor
regions that don’t have access.
In Musk’s vision, Internet data packets going from, say, Los Angeles to
Johannesburg would no longer have to go through dozens of routers and
terrestrial networks. Instead, the packets would go to space, bouncing from
satellite to satellite until they reach the one nearest their destination,
then return to an antenna on earth. “The speed of light is 40 percent
faster in the vacuum of space than it is for fiber,” Musk says. “The long-
term potential is to be the primary means of long-distance Internet traffic
and to serve people in sparsely populated areas.”
This project, he says, will be based in the Seattle office. (Musk has yet to
determine the location of the satellite factory.) The office will start
with about 60 people and may grow to 1,000 within three to four years. The
employees will also work on SpaceX’s Falcon rockets, Dragon capsules, and
additional vehicles to carry various supplies (and soon, people) into space.
“We want the best engineers that either live in Seattle or that want to
move to the Seattle area and work on electronics, software, structures, and
power systems,” Musk says. “We want top engineering talent of all kinds.”
Musk describes his system as “a giant global Internet service provider”
for anyone. But he wants to go even bigger than that: He sees it as the
basis for a system that will stretch all the way to Mars, where he plans to
set up a colony in the coming decades. “It will be important for Mars to
have a global communications network as well,” he says. “I think this
needs to be done, and I don’t see anyone else doing it.”
http://www.businessweek.com/articles/2015-01-17/elon-musk-and-s | w*******r
发帖数: 7276 | 2 这个是大忽悠
communication
【在 T**********e 的大作中提到】
: SpaceX制造发射几百个近地卫星（750哩)，因为轨道低信号速度比同步卫星要快，而且
: 因为光速在真空里比光纤里快40%，最终网络速度要超过现有地面网。
: 以后扩大系统，信号可以达到火星殖民地。
: Elon Musk's Plan to Build a Space Internet
: Musk is tonight hosting a SpaceX event in Seattle, where the company is
: opening a new office. The talk will mostly be about SpaceX’s plans for
: hiring aerospace and software engineers in the Pacific Northwest to boost
: the company’s rocket-building efforts. But he'll also use the talk to
: announce his newest idea, which would launch a vast network of communication
: satellites to orbit earth. The network would do two things: speed up the
| g***s
发帖数: 733 | 3 卫星带宽怎能跟光纤比，忽悠，接着忽悠。
communication
【在 T**********e 的大作中提到】
: SpaceX制造发射几百个近地卫星（750哩)，因为轨道低信号速度比同步卫星要快，而且
: 因为光速在真空里比光纤里快40%，最终网络速度要超过现有地面网。
: 以后扩大系统，信号可以达到火星殖民地。
: Elon Musk's Plan to Build a Space Internet
: Musk is tonight hosting a SpaceX event in Seattle, where the company is
: opening a new office. The talk will mostly be about SpaceX’s plans for
: hiring aerospace and software engineers in the Pacific Northwest to boost
: the company’s rocket-building efforts. But he'll also use the talk to
: announce his newest idea, which would launch a vast network of communication
: satellites to orbit earth. The network would do two things: speed up the
| k*****r
发帖数: 21039 | 4 em这个文科白痴，网络速度是咋回事儿都没闹动就乱开牙。
communication
【在 T**********e 的大作中提到】
: SpaceX制造发射几百个近地卫星（750哩)，因为轨道低信号速度比同步卫星要快，而且
: 因为光速在真空里比光纤里快40%，最终网络速度要超过现有地面网。
: 以后扩大系统，信号可以达到火星殖民地。
: Elon Musk's Plan to Build a Space Internet
: Musk is tonight hosting a SpaceX event in Seattle, where the company is
: opening a new office. The talk will mostly be about SpaceX’s plans for
: hiring aerospace and software engineers in the Pacific Northwest to boost
: the company’s rocket-building efforts. But he'll also use the talk to
: announce his newest idea, which would launch a vast network of communication
: satellites to orbit earth. The network would do two things: speed up the
| s**x
发帖数: 7506 | | w*******r
发帖数: 7276 | 6 当年的铱星连语音通信都干不过地面移动通信甭说需要带宽无限的数据通信了
【在 k*****r 的大作中提到】
: em这个文科白痴，网络速度是咋回事儿都没闹动就乱开牙。
:
: communication
| T**********e
发帖数: 29576 | 7
还不只他一家在搞这个，OneWeb计划类似，已经把频率占上了。
Earlier this week, the entrepreneur Greg Wyler announced a similar effort
through a startup called OneWeb. Wyler has spent the last 15 years trying to
bring Internet access to the so-called “other three billion.” He started
a telecommunications company in Rwanda that set up Africa’s first 3G cell
network. Later, he founded a company called O3b, which owns a satellite
network that delivers fast, cheap Internet to hard-to-reach places along the
equator. Through OneWeb, Wyler looks to expand this vision and fill the
skies with hundreds of satellites that will beam their signals down to low-
cost, solar-powered rooftop antennas.
OneWeb has announced that Qualcomm and the Virgin Group will invest in its
effort, which is expected to cost around $2 billion. Wyler has also already
secured the spectrum needed to deliver such a service from space and expects
to be up and running by 2018. He has a team of more than 30 engineers
developing the satellites, antennas, and software for OneWeb.
While there are major similarities between the two ventures, Musk says he’
ll have an edge through SpaceX’s smarts and manufacturing techniques. “
Greg and I have a fundamental disagreement about the architecture,” Musk
says. “We want a satellite that is an order of magnitude more sophisticated
than what Greg wants. I think there should be two competing systems.”
The backers of OneWeb, including Virgin chief Richard Branson, contend that
Musk doesn't have the rights to spectrum he’ll need to create such a
network. “I don’t think Elon can do a competing thing,” Branson says. “
Greg has the rights, and there isn’t space for another network—like there
physically is not enough space. If Elon wants to get into this area, the
logical thing for him would be to tie up with us, and if I were a betting
man, I would say the chances of us working together rather than separately
would be much higher.”
【在 w*******r 的大作中提到】
: 当年的铱星连语音通信都干不过地面移动通信甭说需要带宽无限的数据通信了
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