Satellite lag

[Claude Hopper]

Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.



--
Claude Hopper

? ? Ľ

 

[nobody >]

Claude Hopper wrote:

Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.

So you think the satllites involved are only 500 miles up?

Google GEOSTATIONARY, dipshit

 

[Claude Hopper]

nobody > wrote:

Claude Hopper wrote:
Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.




So you think the satllites involved are only 500 miles up?

Google GEOSTATIONARY, dipshit

I did dipshit, some are 850km which is 500 miles, dipshit.

--
Claude Hopper

? ? Ľ

 

[Claude Hopper]

nobody > wrote:

Claude Hopper wrote:
Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.




So you think the satllites involved are only 500 miles up?

Google GEOSTATIONARY, dipshit

So, 24,000 miles dipshit, that's the same as around the world 7.7 times
in a second. The earth is 24,000 miles in circumference. That's still
less than a second up and back.

--
Claude Hopper

? ? Ľ

 

[Dave Platt]

In article <uqednXz_-s7h55bUnZ2dnUVZ_i2dnZ2d@giganews.com>,
Claude Hopper <boobooililililil@roadrunner.com> wrote:

Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.

Low-earth-orbit satellites (e.g. the International Space Station, GPS
satellites, etc.) are only a few hundred miles up, and have a short
round-trip time.

Low-earth-orbit satellites are used for some sorts of communications
(e.g. the Iridium satellite-phone system) where short turnaround times
are important. However, you tend to need a lot of them to maintain
coverage of a substantial portion of the planet's surface, because
each one is low enough that it only "sees" a small area of the
surface. And, because they're fast-moving, you have to switch
satellites every few minutes, and use a low-gain omnidirectional
antenna.

These are *not* the sort of satellites used for satellite television,
or for the satellite-internet systems I've seen. Satellites used for
these purposes are in a much higher geostationary or "Clarke" orbit -
a 24-hour orbit located almost directly above the equator. They
appear to stay in the same position in the sky (relative to the
surface) and only wobble around slightly. This allows higher-gain
dish antennas to be pointed at them, without requiring expensive
dish-pointing motors and electronics.

The Clarke orbit is approximately 36,000 km above the equator. This
is far enough away that a single signal round-trip (ground to
satellite and back) requires roughly a quarter of a second. That's
enough to add significant delay to a TV signal or a TCP connection.

Satellite-TV systems tend to exhibit an even bigger apparent delay,
compared to a local live analog broadcast of the same signal, due to
the amount of encoding and decoding delay and buffering required by
the MPEG-2 (or other) digital audio/video system. I think it's not
unusual to see an apparent delay of a second or so, between an analog
TV watching a local transmission, and a satellite receiver showing a
digitized version of the same signal (encoded, buffered, uplinked to
the satellite, transponded down, received, buffered, decoded, run
through A/V sync, and finally displayed on another television).


--
Dave Platt <dplatt@radagast.org> AE6EO
Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

 

[Dave Platt]

In article <Eo6dnchXgYR7HJbUnZ2dnUVZ_jednZ2d@giganews.com>,
Claude Hopper <boobooililililil@roadrunner.com> wrote:

Google GEOSTATIONARY, dipshit

I did dipshit, some are 850km which is 500 miles, dipshit.

There's a distinction between "geostationary" and "geosynchronous".

A "geosynchronous" orbit is one which brings the satellite back over
the same path repeatedly... the orbit is "synchronized" to the
rotation of the earth. There are many such orbits... 24-hour,
12-hour, circular, elliptical, or more complex. Some of these can be
quite low (a few hundred miles).

"Geostationary" orbits are a special case of "geosynchronous".
To a first approximation, a geostationary orbit is a 24-hour,
circular, geosynchronous orbit which allows the satellite to maintain
an apparent position directly above a point on the earth's equator.
These orbits are 36,000 km high.

--
Dave Platt <dplatt@radagast.org> AE6EO
Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior
I do _not_ wish to receive unsolicited commercial email, and I will
boycott any company which has the gall to send me such ads!

 

[Jamie]

Claude Hopper wrote:

Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.



Big brother needs to take time to log your activities?

And what makes you think it does not go out to the edge
of the galaxy and back? With some of the posters I see
around, I swear they're not from around here!


http://webpages.charter.net/jamie_5"

 

[UCLAN]

Claude Hopper wrote:

Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.

Bzzzt.

Satellites in geostationary orbit are more than 22,000 miles above the
equator. Do your math again with that number. And for TV signals, I've
seen THREE satellites used to relay a signal [a news feed for NBC nightly
news.]

 

[Jeff Liebermann]

On Fri, 31 Oct 2008 17:38:10 -0400, Claude Hopper
<boobooililililil@roadrunner.com> wrote:

Why the lag?

It's to give the censors time to block the video and/or add the
bleeps. If transmissions were instantaneous, who knows what immoral
evil you might be allowed to view.

Light and microwaves travel at 186,000 miles a second.

Nope. They travel at 3*10^8 meters/second. Real photons speak
metric.

That means a microwave could go around the earth 7.7 times in a second.

Nope. The light and microwaves would be slowed down by the velocity
factor of the medium. Air is 1.0, but if you're going to shovel your
microwaves around the planet through coax cable, the speed is about
0.7c. For fiber optics, it's about 0.5c.

A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave.

Nope. Not 500 miles but 805 km. Real satellites also talk metric.

That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.

Which satellite are you talking about? 800 km altitude is a MEO
(medium earth orbit) bird. There was some talk about using such
satellites for internet access, but that died with the dot com bust in
the late 1990's. Gilat (O3B) is talking with Google about MEO
satellites for internet, but that's currently science fiction.
<http://www.satnews.com/cgi-bin/story.cgi?number=1097664977>
Iridium flys at about 780 km altitude. However, Hughesnet, WildBlue,
Starband, and others, all lease transponders on geostationary
satellites at 35,900 km altitude. Which satellite are you talking
about?

So why is there such a lag in satellite internet and TV???

I answered that. It is so that the censors have time to decide if you
are worthy to watch a program. If sufficiently disgusting, it goes to
black and the audio is buried under a tone. It's for your own good,
you know.

Answer me
that. They keep telling me its the distance to travel. I don't think so.

I don't think you could afford to travel the distance. I hear the
Russians are selling orbital visits, but none of them will go the
geostationary satellite belt.

One way delay = 35,900,000 meters / 3*10^8 meters/sec = 120 msec
When you run "ping" through a satellite connection, the packet has to
go from the ground to the bird and then back to the ground. The
response also has to make the trip. Therefore, the minimum latency is
4 times the one way delay or 480 msec. Actually, it's somewhat more
because the satellite is NOT directly overhead and the actual altitude
is somewhat greater than 35,900 km depending on the slant angle.

The rest of the delays are tangled up in encoding delays, buffering,
caching (some of which is in the satellite), and terrestrial land line
delays. The gateway router could easily be hundreds of miles away
from the head end.

If you're still having problems with the math, I suggest you consult
an orbital mechanic.


--
# Jeff Liebermann 150 Felker St #D Santa Cruz CA 95060
# 831-336-2558 jeffl@comix.santa-cruz.ca.us
# http://802.11junk.com jeffl@cruzio.com
# http://www.LearnByDestroying.com AE6KS

 

[Dave Plowman (News)]

In article <uqednXz_-s7h55bUnZ2dnUVZ_i2dnZ2d@giganews.com>,
Claude Hopper <boobooililililil@roadrunner.com> wrote:

Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.

Anything digital delays the signal - some more than others. Digital radio
in the UK (DAB) is over a second late compared to analogue, and that's a
terrestrial service. As does digital terrestrial TV. These delays have
more effect than the transmission distance.

--
*Give me ambiguity or give me something else.

Dave Plowman dave@davenoise.co.uk London SW
To e-mail, change noise into sound.

 

[PeterD]

On Fri, 31 Oct 2008 14:49:49 -0700, "nobody >"
<usenetharvested@aol.com> wrote:

Claude Hopper wrote:
Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.




So you think the satllites involved are only 500 miles up?

Google GEOSTATIONARY, dipshit

What do you expect from a brain damaged troll...

 

[PeterD]

On Fri, 31 Oct 2008 18:09:48 -0400, Claude Hopper
<boobooililililil@roadrunner.com> wrote:

nobody > wrote:
Claude Hopper wrote:
Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.




So you think the satllites involved are only 500 miles up?

Google GEOSTATIONARY, dipshit

I did dipshit, some are 850km which is 500 miles, dipshit.

IDIOT...

[PHIL-MODE]
YOU FUCKING MORON, YOU'VE GOT SHIT FOR BRAINS.

YOU COULD NOT UNDERSTAND EVEN A SIMPLE THING, LET ALONE THE CONCEPT OF
GEOSTATIONARY SATELITES, YOU IDIOT!

[/PHIL-MODE]

Try this, idiot:

Geostationary orbits can be achieved only very close to the ring
35,786 km (22,236 mi) directly above the equator. This equates to an
orbital velocity of 3.07 km/s (1.91 mi/s) or a period of 1436 minutes.

reference: http://en.wikipedia.org/wiki/Geostationary

which is as good as any for this basic shit.

NOW FUCKING PISS OFF, TROLL...

 

[Meat Plow]

On Fri, 31 Oct 2008 17:38:10 -0400, Claude Hopper wrote:

Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.

At least you got your nickname right.

 

[Peter Hucker]

On Fri, 31 Oct 2008 22:38:17 -0000, Dave Platt <dplatt@radagast.org> wrote:

In article <Eo6dnchXgYR7HJbUnZ2dnUVZ_jednZ2d@giganews.com>,
Claude Hopper <boobooililililil@roadrunner.com> wrote:

Google GEOSTATIONARY, dipshit

I did dipshit, some are 850km which is 500 miles, dipshit.

There's a distinction between "geostationary" and "geosynchronous".

A "geosynchronous" orbit is one which brings the satellite back over
the same path repeatedly... the orbit is "synchronized" to the
rotation of the earth. There are many such orbits... 24-hour,
12-hour, circular, elliptical, or more complex. Some of these can be
quite low (a few hundred miles).

"Geostationary" orbits are a special case of "geosynchronous".
To a first approximation, a geostationary orbit is a 24-hour,
circular, geosynchronous orbit which allows the satellite to maintain
an apparent position directly above a point on the earth's equator.
These orbits are 36,000 km high.

That sounds about right - 0.1 seconds each way. When I had satellite internet, I was getting a ping time of about 200-300ms.

--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com

Jesus, Moses, and an old man are playing golf.
Moses tees up and hits his ball into the water trap. Nonplussed, he goes over to the lake, parts the water with his club, and hits the ball onto the green.
Jesus tees up next, and also manages to land in the water trap, where the ball curiously floats. So he walks down to the lake, across the water, and hits his ball out onto the green.
Last to tee up is the old man, whose ball heads straight for the water, also. As the ball hits the surface of the water, a fish jumps up and swallows it and is immediately grabbed by an eagle, which deposits the fish on the green. The ball shoots out of the fish's mouth and rolls into the cup.
Jesus turns around and says, "Nice shot, Dad, but would you quit messing around and play golf?"

 

[Peter Hucker]

On Sat, 01 Nov 2008 14:29:37 -0000, PeterD <peter2@hipson.net> wrote:

On Fri, 31 Oct 2008 18:09:48 -0400, Claude Hopper
boobooililililil@roadrunner.com> wrote:

nobody > wrote:
Claude Hopper wrote:
Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.




So you think the satllites involved are only 500 miles up?

Google GEOSTATIONARY, dipshit

I did dipshit, some are 850km which is 500 miles, dipshit.

IDIOT...

[PHIL-MODE]
YOU FUCKING MORON, YOU'VE GOT SHIT FOR BRAINS.

YOU COULD NOT UNDERSTAND EVEN A SIMPLE THING, LET ALONE THE CONCEPT OF
GEOSTATIONARY SATELITES, YOU IDIOT!

[/PHIL-MODE]

Try this, idiot:

Geostationary orbits can be achieved only very close to the ring

What is "the ring"?

35,786 km (22,236 mi) directly above the equator. This equates to an
orbital velocity of 3.07 km/s (1.91 mi/s) or a period of 1436 minutes.

reference: http://en.wikipedia.org/wiki/Geostationary

which is as good as any for this basic shit.

NOW FUCKING PISS OFF, TROLL...

--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com

You can't please everyone. But it IS possible to piss 'em ALL off at the same time.

 

[Peter Hucker]

On Fri, 31 Oct 2008 22:15:26 -0000, Claude Hopper <boobooililililil@roadrunner.com> wrote:

nobody > wrote:
Claude Hopper wrote:
Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.




So you think the satllites involved are only 500 miles up?

Google GEOSTATIONARY, dipshit

So, 24,000 miles dipshit, that's the same as around the world 7.7 times
in a second. The earth is 24,000 miles in circumference. That's still
less than a second up and back.

It's 0.2 seconds. I can vouch for this with satellite internet.

--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com

Take notice: when this sign is under water, this road is impassable.

 

[Peter Hucker]

On Sat, 01 Nov 2008 04:58:52 -0000, Jeff Liebermann <jeffl@cruzio.com> wrote:

On Fri, 31 Oct 2008 17:38:10 -0400, Claude Hopper
boobooililililil@roadrunner.com> wrote:

Why the lag?

It's to give the censors time to block the video and/or add the
bleeps. If transmissions were instantaneous, who knows what immoral
evil you might be allowed to view.

When are we going to grow out of this childishness? It took decades to get the word "bloody" onto the BBC.


--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com

Yellatio: Really loud oral sex

 

[Peter Hucker]

On Sat, 01 Nov 2008 09:22:40 -0000, Dave Plowman (News) <dave@davenoise.co.uk> wrote:

In article <uqednXz_-s7h55bUnZ2dnUVZ_i2dnZ2d@giganews.com>,
Claude Hopper <boobooililililil@roadrunner.com> wrote:
Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.

Anything digital delays the signal - some more than others. Digital radio
in the UK (DAB) is over a second late compared to analogue, and that's a
terrestrial service. As does digital terrestrial TV. These delays have
more effect than the transmission distance.

Why on earth should digitizing cause a delay? They need some faster processors.

--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com

A man came home from work early one day, and found his wife naked and panting on the bed.
"Honey," she said, thinking quickly, "I think I'm having a heart attack!"
While rushing to call the doctor, he nearly stumbled over his crying four year old, who told him there was a naked man in the closet.
He ran to the closet, opened the door, and there was his best friend.
"Damn it, Dave" he shouted, "Jill's having a heart attack and here you are scaring the hell out of the kids!"

 

[Peter Hucker]

On Sat, 01 Nov 2008 15:59:58 -0000, Meat Plow <meat@petitmorte.net> wrote:

On Fri, 31 Oct 2008 17:38:10 -0400, Claude Hopper wrote:

Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a second.
A satellite is only 500 miles up, that's 1000 miles round trip for a
microwave. That means a signal should be able to travel to a satellite
and back to earth 186 times a second or once in .005 seconds.
So why is there such a lag in satellite internet and TV??? Answer me
that. They keep telling me its the distance to travel. I don't think so.

At least you got your nickname right.

Nonsense. If he lived in the clouds, the distance to the satellite would be shorter.

--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com

_..._
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[Peter Hucker]

On Sat, 01 Nov 2008 18:46:58 -0000, Meat Plow <meat@petitmorte.net> wrote:

On Sat, 01 Nov 2008 17:56:03 +0000, Peter Hucker wrote:

On Fri, 31 Oct 2008 22:15:26 -0000, Claude Hopper
boobooililililil@roadrunner.com> wrote:

nobody > wrote:
Claude Hopper wrote:
Why the lag? Light and microwaves travel at 186,000 miles a second.
That means a microwave could go around the earth 7.7 times in a
second. A satellite is only 500 miles up, that's 1000 miles round
trip for a microwave. That means a signal should be able to travel to
a satellite and back to earth 186 times a second or once in .005
seconds. So why is there such a lag in satellite internet and TV???
Answer me that. They keep telling me its the distance to travel. I
don't think so.




So you think the satllites involved are only 500 miles up?

Google GEOSTATIONARY, dipshit

So, 24,000 miles dipshit, that's the same as around the world 7.7 times
in a second. The earth is 24,000 miles in circumference. That's still
less than a second up and back.

It's 0.2 seconds. I can vouch for this with satellite internet.

Yeh sure LOL. You had the "Faster Than the Speed Of Light" internet.

Do the calculations and you'll find that 0.2 is about right for 24000 miles.

P.S. you're plonked for trolling with followup headers. Grow up.

--
http://www.petersparrots.com http://www.insanevideoclips.com http://www.petersphotos.com

----------------
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.-| | | |-.
/ | |/\/\/\/\| | \
/ /| `--------` |\ \
| | | | | |
| | | | | |
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(____)| |(____)
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( )( )
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