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Japan Launches "Super-Speed" Internet Satellite
A number of readers wrote in about the launch this morning of a Japanese H-2A rocket carrying a Kizuna ("Winds") satellite into orbit. Kizuna is intended to provide "super high-speed data transmission" for Japan and Southeast Asia. The news stories on the launch, such as the AP's linked here, are short on technical detail. For example they say the satellite successfully achieved orbit 175 miles above the earth — hardly suitable for Internet communications to a specific area on the surface (remember Teledesic?). Reader nebulus4 provided a link to the Japan Aerospace Exploration Agency site with an illustration and a little more detail. Such as the fact that Kizuna is destined for geosync orbit, and that a 45-cm antenna will equip eventual users for 155 Mbps down / 6 Mbps up, whereas a 5-m antenna will allow enterprises and ISPs to tap into 1.2 Gbps down. Given the latency to geosync orbit, you probably wouldn't want to use Kizuna to play an online shooter.
...the RIAA and MPAA today announced a plan to knock the satellite out of orbit with a missile to "protect the public".
Super Latency!
512 MB RAM, 20 GB disk, 200 GB transfer, five datacenters. $19.95/month.
I'm going to wait until it's Super Saiyan.
512 MB RAM, 20 GB disk, 200 GB transfer, five datacenters. $19.95/month.
So a subsistence farmer in rural Indonesia gets a better download speed than me, a sophisticated suburban Australian. Awesome.
22,233 miles to the satellite
round trip = times 4 = 88,932 miles
speed of light (wave propagation) = 186,282 mi/sec
latency = 88,932 / 186,282 = 0.477 seconds (on top of regular network latency)
Curse you speed of light. You win again!
More
http://www.space-travel.com/reports/Japan_successfully_launches_high-speed_Internet_satellite_999.html
I don't know what is worse..
The fact that you posted this racist crap in the first place or the fact that you posted anon so you could mod down anyone that responded to you.
Problem is, a Molniya orbit requires three satellites for coverage at the apogee, which is at about the same altitude as the geosynchronous orbit. At the perigee the satellites move faster, so you need more of them to keep one always on sight.
Who for a brief moment thought "Wait, they've developed a satellite with internet access that orbits the earth at insanely high speeds?" or something similar? Sleep-depraved mind FTW. :p
systemd is not an init system. It's a GNU replacement.
175 miles is the separation altitude for the rocket. Satellites usually boost themselves to geostationary orbit. The Delta IV heavy can blast all the way to geostationary orbit but no-one can afford it.
IT SUCKS!!! I install WildBlue, 1 of the 2 main Sat. ISP's. It doesn't matter how fast the connection speed is, the latency SUCKs. It averages 1200-1800 ms (no that's not a typo, check it out if you want). You can not play online games, outside of backgammon. The only thing I can say for it is, it is better than dial-up, although you can play some online games w/dial-up.
If you could reason with religious people, there would be no religious people
I didn't see what the original comment was, but I am guessing it was not about the technical merits of satellite internet. There is a difference between the intent and purpose of launching a communications satellite, and shooting one down. Maybe got he/she this confused.
With regards to latency, it's pretty hard to make light go faster, well, then light. Damn you physics!
Did they paint it red so it'll go 3 times faster than a normal Satellite connection?
Ginga no Rekshiya Mata Each page.
Any Idea how the uplink is supposed to work? Can thousands of 45cm dish all communicate with the satellite at 36,000km simultaneously? I know that years ago you needed a DSL/Dial-up connection for the uplink, is the not the case anymore?
is something to solve the last "175 mile problem." Okay. What if we replace all of that empty space with something that we'll call "FIBER". Only instead of running all of the fiber to the satellite and back we could just run it over land. Barring any service interruptions by 30 story lizards breathing fire all over the data center this might just work!
load "$",8,1
With radio waves traveling at the speed of light what difference is 175 miles going to make?
175 miles? Try more like 22,230 miles. That's pretty much the only place you can put it unless you want your internet connection to only work 3 minutes out of every 90 minutes...
The reasons are simple physics. Gravity causes everything to want to fall towards the center of the Earth. Satellites manage to stay in orbit because they are constantly "falling" ahead of the Earth. That's why things in "low earth orbit" are referred to as being "in freefall" and not REALLY in zero gravity. Gravity is still there, only the velocity of the satellite is so high that all gravity manages to do is curve the trajectory of the satellite, not cause it to lose height. This means your satellite is going to be moving VERY fast with respect to the ground.
It's only at 22,230 miles out where the circle is so big that your satellite now appears fixed with respect to the ground. It's still moving. It's still "free-falling". But it appears to be hovering over a fixed spot over the equator - very useful for communication satellites since now you know where to aim your antenna and you don't have to bother moving it.
Seven puppies were harmed during the making of this post.
This means that new series are available to fansubbers even sooner than previously ! Yarrrr !
Forget magic. Any technology distinguishable from divine power is insufficiently advanced.
With all this reliance on satellite technology for GPS, communications, and weather prediction what happens when (not if) the sun hits a more active solar cycle eliminating all of these satellites in one fell swoop? We have become terribly dependent on satellite technology (that I agree is cool). However, there have been solar storms that would knock out all of our satellites in recent memory -- only we did not have any satellites up yet. Now the satellites are up and the next large solar storm is just lurking out there getting ready to strike.
As usual, beware any significant reliance on any one technology.
This should help with broadband penetration. I know, you'll never be able to use it for gaming. However, when the US isn't on a top ten list of connected countries, its really sad. Something like this could help those in very rural areas get connected.
The name of the satellite has been mistranslated: 'kizuna' () means bonds (as in 'family bonds') and not 'winds', which makes a lot more sense given the satellite's function.
Whatever the country, the only winning move is not to play.
Unless you're pushing the button from your newly colonized extraterrestrial planet with a nice self-sustaining biosphere of its own =)
Ice Cream has no bones.
You're missing a few decimal places... The distance is 35,000 kilometers times 4 for a round trip of latency. 140,000,000/300,000,000 = ~0.5 sec
There are two types of people in the world: Those who crave closure
I had thought the same thing, but that's not correct. If you look at the JAXA page on the nickname, Kizuna is the nickname and the official name is WINDS (spelled all uppercase) which is an acronym. It's very confusing though.
;-P
Sorry - couldn't resist. I'll get my hat...
"Bah!" - Dogbert
It's up there now...until the United States decides to shoot it down.
okinawa japan
It's not only gamers and users of VoIP who can't tolerate the latency of a geostationary satellite; neither can ordinary web surfers or many other users of TCP. Ask anyone who uses Hughes DirectNet or WildBlue. A modern web page builds in many transactions and is "optimized" for latencies in measured in milliseconds; not half a second as this satellite will have at best. File transfer protocols also depend on interaction altho less so. Latency can be MORE important than bandwidth in determining the usefulness of an Internet connection. More at http://blog.tomevslin.com/2008/02/japans-internet.html
Comment removed based on user account deletion
It seems to be somewhat of a JAXA convention to have a Japanese nickname and an English official name. If you take a look at their lunar probe project, it is referred to as KAGUYA(SELENE).
node-def: a tactical hacking sim. Now in open beta.
3.76ms? How do you figure? I used 175 miles * 2 = 350. 350/186,000 = 1.8ms, or does latency to a satellite take 4 trips?
How are people computing latency?
I saw this on the BBC News website:
"Data sent over fibre optic networks is subject to the limitations of the speed of light, which means interactivity between the server and gamer will never have a latency below 70 milliseconds."
70ms latency being a minimum over fiber optic networks? Is the speed of light slowed down in fiber optic cables?
Speed of light would normally be able to travel over 13000 miles (>20800km) in 70ms. But the same article was claiming that consoles were on the way out and that 'flash' would be used to write online games, so maybe the technical expertise in that article is lacking a bit?
If you can realistically send enough people and equipment to start an entire human civilization & self-sustaining biosphere to the planet, you can sure as hell send enough nukes to destroy it, so long as they can be identified as the culprit, or there are enough nukes to point at everybody. Mutually assured destruction has a long reach.
The Dune cycle's Golden Path involved doing whatever possible(up to and including genocide) to spread humanity far beyond the reach of any one human or organization. It's a nontrivial goal.
People in Soviet Russia, however, appear to be afflicted with amusing juxtapositions of the aforementioned situation
How many people can get 1.2GB/s at the same time using this satellite? How much does the satellite dish to download and upload to the satellite cost? What is the expected price to connect using this satellite? Will customers be charged per GB transfered or a flat fee per month for a certain bandwidth? Is the bandwidth dedicated to each user or delivered at best effort depending on the bandwidth used by the other customers in the region or on the whole satellite? Someone please answer. I can't find any clear information in any of the reports on this story. If this satellite provide unlimited cheap wireless bandwidth, then I wouldn't understand why we aren't all using those, and why we aren't sending such satellites to cover Africa and other areas of the world that hasn't got a lot of broadband yet.
What does latency mean if you're downloading a 5GB file? There are some applications that need low latency, some that need hight bandwidth. Why can't a network infrastructure can do both, and use smart routing to pick the right route for the job?
"Super-Speed," eh? How much faster does it orbit than other satellites?
I think we all know biospheres are unsustainable. Pauly Shore proved it in the eponymous documentary.
2. WINDS is an acronym for Wideband IntNetworking engineering and Demonstration Satellite.
3. Kazuna (WINDS) is the Satellite (PROJECT) name.
4. The key part in the project name is "engineering and Demonstration." This means, kiddies, that it is a demonstration of the engineering requirements for a satellite network that will be used for:
a. emergency and/or disaster communications where all you need is a frickin' dish in case all other forms of land-based equipment are destroyed, unusable or inaccessible.
b. medical treatment for remote areas using hi-resolution imagery transmitted to specialists.
c. education for remote areas.
Your broadband internet service in the west is still in the last century (or non-existent), so you might want to look in the mirror before you leap into making fun of something you haven't even read about. It is not intended for gaming, you frickin' dolts.
For what it's worth, none of the Japanese I know whose jobs get anywhere close to rockets and/or nuclear devices are at all interested in revenge for Hiroshima. The few crazies who don't understand MAD and don't understand the economics of letting us handle their defense basically aren't allowed to work any job at all.
There are other things to worry about before worrying about whether Japan had nuclear missiles.
Computer memory is just fancy paper, CPUs just fancy pens with fancy erasers; the 'net is just a fancy backyard fence.
Yes the parent is small minded, I agree with my parent post on that point. There is a point to aggression though, just misguided. The first question is who will be able to gain access to the satellite? Can anyone subscribe or is it open for everyone? If it's open then won't the Chinese be able to access it for their own needs? If that's so then couldn't the Japanese monitor and gather information from a country that it has been in conflict for a long time? While there is a small bit of animosity for the US left because of World War II, they understand the limitations within the market. Especially the bureaucracy the US has setup for foreign interests within our own land. While it seems like it's an attempt for PR to show their efforts towards progression, who are they trying to show off to? The US? China? Europe? What does it mean for them in the long run? I'm raising a lot of questions here because things are changing quickly now and these questions need to be raised.
But. Why can't we use the already existing technology to provide (initially) slow but "pervasive" internet access everywhere? The developed world could easily afford to build a network of satellites that provides both "super-speed" data capabilities for their own wealthy subscribers while offering slower but free access to anyone else interested. Free internet access (ie. communications), independent of the policies of local regimes, could easily be considered a modern human right.
Instead of the token complaints of lack of media and communication freedoms in countries like China and their vassal dictatorships in North Korea and Burma, the West could give these oppressed people access to the outside world, and the ability to communicate within their local "firewalls" without pervasive state monitoring. Of course the possession of unauthorized (ie. fully monitored) communication devices is criminalized in such countries, so the devices would have to be not only affordable but also compact, perhaps identical to existing smartphones or PDAs. In places where satellite dishes are allowed or somewhat tolerated, there should be a way of converting existing dish/decoder combos into simple internet terminals.
I've no doubt that this could be done, but thanks to Dubuya's misguided quasi-religious "war of terror" and "partnering" with the likes of Putin and Hi Jintao (aka the Butcher of Tibet) and the resulting labelling of occupied Tibetans as "terrorists", the USA in particular seems to be in no mood for creating freedom of communications in such "partnering" countries, not when their dominant corporations would see no financial incentives in creating such network and in any case they tend to be extremely friendly with the ruling Chinese regime already. And god forbid if those dangerous prayer and freedom(!)-chanting Tibetan "terrorists" would be able to use their own language to communicate freely and even "terrorize" the occupying Chinese army with details of their oh-so-liberating policies in Tibet!
Where's the union of peace- and freedom-loving democracies when we'd need it?
Should invading one's peaceful neighbours be opposed, or rewarded with trade deals?
serious business web pages can leave most of that bloated interactive crap behind. Buying and selling and monitoring business can be done old-school: ssl and text and small images and forms.
Even the maps and TV listings of yahoo have become just fucking annoying with all that interactive bullshit, classic mode is the way to go.
web developers can quit turning webdom into a fucking goddam pinball machine.
Well, I do live in South-East Asia (Indonesia), and I'm not as concerned about the latency issues as everyone else seems to be. The reason is that, for most people, internet access is slow anyway. Home connections are all capped at 128kb/s, even in the capital city. Cell phone time is dirt cheap, text messages even cheaper, so VOIP is not that big a concern for us (BTW, North Americans really get ripped off by phone companies). A 1/2 second latency delay in opening a web page isn't that big a deal, if it will take 10-20 seconds to get the page anyway. For people outside the big cities, I think this could be A Good Thing indeed. Dean
The subject who is truly loyal to the Chief Magistrate will neither advise nor submit to arbitrary measures (Junius)
The satellite, equipped with two large multi-beam antennas, separated from the rocket and successfully entered its intended orbit 175 miles from Earth, JAXA said in a statement.
I hope that's right. I'm so ready for fast satellite, weather balloon, stratellite or similar internet communications. Your application of bold formating is misleading. Try mine instead and you will see the truth:
The satellite, equipped with two large multi-beam antennas, separated from the rocket and successfully entered its intended orbit 175 miles from Earth, JAXA said in a statement. Editors.
find -name "*base*" -exec chown us {} \; ; ln -s