GoodIdea
@bu.edu
| reply to jstack
Re: Satellite
said by jstack  :said by PolarBear :The pings can NEVER get better. 22,000 miles will never be any less than 22,000 miles. It's a lot more than that if you think about it. It's 22,300 miles up, another 22,300 down, then it gets routed to the website on ground, and then finally, it goes back up and down to you. It totals about 90,000 miles. Er, internet packets are a form of electromagnetism. EM waves travel at ~186,000 miles per second. This means even if it were 90,000 miles round trip, the packets could traverse the distance in about half a second.
The satellites are 22,000 miles above the equator, which means that if you look at the geometry, it will be further away than that from us folks in North America. Nonetheless, it still would take well less than a second for the round trip. |
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PolarBear
The bear formerly known as aaron8301
Premium
join:2005-01-03 | reply to koam
And that, my friend, is why satellite internet has such high lags! |
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koam
Pink Pecker
Premium
join:2000-08-16
East Puddle
clubs:
 ·Shoreham Telephone
 ·ViaTalk
 ·surpasshosting
| reply to PolarBear
No, i'm just surprised. I imagined they'd be closer. 22,000+ miles up is nearly three times Earth's diameter. Almost three Earths would fit between Earth's surface and the satellite. That's far!
In contrast, the International Space Station and Shuttle, when it goes to the ISS, orbit at less than 250 miles up. 189-246 miles vs 22,223 miles, a huge difference. |
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Satellite Kid
@Level3.net
| reply to PolarBear
Re: Satellite - 22,000 miles?
Satellites such as these are put into geosynchronous or geostationary orbits, a position where they are in the same apparent place in the sky all the time, or at the same place at the same time each day. That makes them easy to aim at with the ground antenna. Such orbits are always at 22,000 miles up. »en.wikipedia.org/wiki/Geosynchronous_orbit |
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BosstonesOwn
join:2002-12-15
Everett, MA
clubs:
 ·Comcast
| reply to jstack
Re: Satellite
said by jstack :said by PolarBear :The pings can NEVER get better. 22,000 miles will never be any less than 22,000 miles. It's a lot more than that if you think about it. It's 22,300 miles up, another 22,300 down, then it gets routed to the website on ground, and then finally, it goes back up and down to you. It totals about 90,000 miles. Newer satellites have routing built in. They can actually beam it to a closer downlink and uplink center to try and lessen lag. I have heard they are dropping the latency by as much as 200 ms. Which is a nice drop for satellite.
--
"It's always funny until someone gets hurt......and then it's absolutely friggin' hysterical!" |
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PolarBear
The bear formerly known as aaron8301
Premium
join:2005-01-03
·CableOne
| reply to koam
said by koam :and where did you get 22,000 miles from? Well, I kind of guesstimated it from what I've learned about DirecTV as an installer.
Why, do you not agree? |
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koam
Pink Pecker
Premium
join:2000-08-16
East Puddle
clubs:
1 edit | reply to PolarBear
and where did you get 22,000 miles from? |
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PolarBear
The bear formerly known as aaron8301
Premium
join:2005-01-03 | reply to jstack
My point was, the distance will never be reduced, thus the pings will never be reduced.
Strato-lites, anyone? |
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jstack
join:2001-12-09
South San Francisco, CA
·Verizon Online DSL
| reply to PolarBear
said by PolarBear :The pings can NEVER get better. 22,000 miles will never be any less than 22,000 miles. It's a lot more than that if you think about it. It's 22,300 miles up, another 22,300 down, then it gets routed to the website on ground, and then finally, it goes back up and down to you. It totals about 90,000 miles. |
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PolarBear
The bear formerly known as aaron8301
Premium
join:2005-01-03 | reply to Luker
The pings can NEVER get better. 22,000 miles will never be any less than 22,000 miles. |
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