Author Topic: $28 billion of GEO Sat launches projected  (Read 13581 times)

Offline Chris Bergin

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Offline Heather

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RE: $28 billion of GEO Sat launches projected
« Reply #1 on: 02/09/2006 10:40 am »
Good money if you've got it spare!

Offline British NASA

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RE: $28 billion of GEO Sat launches projected
« Reply #2 on: 02/09/2006 11:56 am »
If India/China are going to be at 20% and USA at 22% does that mean the Russians are going to just get more dominant?

Offline JamesSpaceFlight

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RE: $28 billion of GEO Sat launches projected
« Reply #3 on: 02/09/2006 12:02 pm »
ESA will dilute the overal percentage, given it's Geostationary, and Ariane carriers are excellent at such launches.

Offline UK Shuttle Clan

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RE: $28 billion of GEO Sat launches projected
« Reply #4 on: 02/09/2006 01:33 pm »
Geostationary. Those are the ones that go 28,000 miles away and circle with the Earth's rotation?

Offline Jim

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RE: $28 billion of GEO Sat launches projected
« Reply #5 on: 02/09/2006 02:00 pm »
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UK Shuttle Clan - 9/2/2006  8:33 AM

Geostationary. Those are the ones that go 28,000 miles away and circle with the Earth's rotation?

yes, but at 22 something thousand.

Offline Jamie Young

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RE: $28 billion of GEO Sat launches projected
« Reply #6 on: 02/09/2006 04:18 pm »
Any reason for the large amount of launches? These Geo sats are the best ones for internet and digital comms?

Offline James Lowe1

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RE: $28 billion of GEO Sat launches projected
« Reply #7 on: 02/09/2006 04:48 pm »
Yep, most of these Geo Sats are for such communications, including military.

Offline James Lowe1

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RE: $28 billion of GEO Sat launches projected
« Reply #8 on: 03/05/2006 06:15 pm »
Thread moved.

Offline vt_hokie

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RE: $28 billion of GEO Sat launches projected
« Reply #9 on: 03/06/2006 05:32 am »
Space debris is a growing problem with serious long term implications.  I have to wonder to what extent it will threaten the industry and demand better solutions over the coming decades.

Offline Jim

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RE: $28 billion of GEO Sat launches projected
« Reply #10 on: 03/06/2006 03:12 pm »
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vt_hokie - 6/3/2006  12:32 AMSpace debris is a growing problem with serious long term implications.  I have to wonder to what extent it will threaten the industry and demand better solutions over the coming decades.

All FAA licensed launched must have a disposal plan and for GEO sats, that includes fuel saved to boost them into a disposal orbit, which is super synchronous.

Offline vt_hokie

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RE: $28 billion of GEO Sat launches projected
« Reply #11 on: 03/06/2006 04:01 pm »
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Jim - 6/3/2006  11:12 AM
All FAA licensed launched must have a disposal plan and for GEO sats, that includes fuel saved to boost them into a disposal orbit, which is super synchronous.


Yes, I realize this.  However, I think the disposal orbit is generally about 300 km beyond geostationary altitude, and there's a lot of crap accumulating out there!  Also, when geostationary satellites experience sudden failures, they never get a chance to make it into that disposal orbit.  

Offline Avron

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RE: $28 billion of GEO Sat launches projected
« Reply #12 on: 03/07/2006 03:49 am »
Quote
vt_hokie - 6/3/2006  12:01 PM

Quote
Jim - 6/3/2006  11:12 AM
All FAA licensed launched must have a disposal plan and for GEO sats, that includes fuel saved to boost them into a disposal orbit, which is super synchronous.


Yes, I realize this.  However, I think the disposal orbit is generally about 300 km beyond geostationary altitude, and there's a lot of crap accumulating out there!  Also, when geostationary satellites experience sudden failures, they never get a chance to make it into that disposal orbit.  

Would it not decay from super synchronous orbit, and take out a good bird?

Offline Jim

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RE: $28 billion of GEO Sat launches projected
« Reply #13 on: 03/07/2006 10:17 am »
Quote
Avron - 6/3/2006  10:49 PM
Quote
vt_hokie - 6/3/2006  12:01 PM
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Jim - 6/3/2006  11:12 AMAll FAA licensed launched must have a disposal plan and for GEO sats, that includes fuel saved to boost them into a disposal orbit, which is super synchronous.
Yes, I realize this.  However, I think the disposal orbit is generally about 300 km beyond geostationary altitude, and there's a lot of crap accumulating out there!  Also, when geostationary satellites experience sudden failures, they never get a chance to make it into that disposal orbit.  
Would it not decay from super synchronous orbit, and take out a good bird?

Why would it decay.  GEO sats don't decay.  only LEO sats because they are "low earth orbit", close to the atmosphere.

Offline braddock

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RE: $28 billion of GEO Sat launches projected
« Reply #14 on: 03/07/2006 11:51 am »
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vt_hokie - 6/3/2006  12:01 PM
However, I think the disposal orbit is generally about 300 km beyond geostationary altitude, and there's a lot of crap accumulating out there!

Isn't it a wonderful thought, though, that all of that aerospace history is safe up there in pristine condition?  Someday the technical merits of our civilization will be judged based on that, long after the last Buran or Saturn V has rotted away.

Offline vt_hokie

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RE: $28 billion of GEO Sat launches projected
« Reply #15 on: 03/07/2006 01:11 pm »
The orbits will decay, but I think it'll be several hundred years at least until the GEO stuff comes down.

Offline Jim

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RE: $28 billion of GEO Sat launches projected
« Reply #16 on: 03/07/2006 01:45 pm »
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vt_hokie - 7/3/2006  8:11 AMThe orbits will decay, but I think it'll be several hundred years at least until the GEO stuff comes down.

They never come down.  They go out if anything.



Offline vt_hokie

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RE: $28 billion of GEO Sat launches projected
« Reply #17 on: 03/07/2006 02:43 pm »
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Jim - 7/3/2006  9:45 AM
They never come down.  They go out if anything.

That may be.  Certainly the natural orbits will be more elliptical, but is it true that they never decay to the point of falling back to Earth?

Offline Jim

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RE: $28 billion of GEO Sat launches projected
« Reply #18 on: 03/07/2006 03:03 pm »
Anything above 2500 km perigee is permanent

Offline vt_hokie

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RE: $28 billion of GEO Sat launches projected
« Reply #19 on: 03/07/2006 10:06 pm »
I see.  I seem to have a vague memory of hearing that the orbits will decay over hundreds or thousands of years, but I have nothing concrete to offer.  In any case, they're up there permanently for all practical purposes.  But what about 10,000 years from now?  50,000 years?  You say it's more likely that they'll escape Earth's grasp?

Offline Jim

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RE: $28 billion of GEO Sat launches projected
« Reply #20 on: 03/07/2006 11:34 pm »
yes

Offline vt_hokie

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RE: $28 billion of GEO Sat launches projected
« Reply #21 on: 03/08/2006 02:36 am »
I stand corrected then!   :)

Offline Avron

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RE: $28 billion of GEO Sat launches projected
« Reply #22 on: 03/08/2006 04:13 am »
Quote
Jim - 7/3/2006  6:17 AM

Quote
Avron - 6/3/2006  10:49 PM
Quote
vt_hokie - 6/3/2006  12:01 PM
Quote
Jim - 6/3/2006  11:12 AMAll FAA licensed launched must have a disposal plan and for GEO sats, that includes fuel saved to boost them into a disposal orbit, which is super synchronous.
Yes, I realize this.  However, I think the disposal orbit is generally about 300 km beyond geostationary altitude, and there's a lot of crap accumulating out there!  Also, when geostationary satellites experience sudden failures, they never get a chance to make it into that disposal orbit.  
Would it not decay from super synchronous orbit, and take out a good bird?

Why would it decay.  GEO sats don't decay.  only LEO sats because they are "low earth orbit", close to the atmosphere.

Thanks Jim...

Offline vt_hokie

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RE: $28 billion of GEO Sat launches projected
« Reply #23 on: 03/08/2006 07:05 pm »
Here's something sort of close to what I was looking for that came up in a search:

Geostationary orbit decay and geostationary orbit crowding

The problem of a possible satellite collision due to the geostationary orbit decay is examined in view of the increasing number of geostationary satellites and the hazard of in-orbit exhaustion of fuel. A number of orbital decay mechanisms are outlined, among them electromagnetic drag on a charged satellite, meteorite and micrometeorite collisions, and solar radiation pressure. It is suggested that a geostationary satellite be boosted up to an altitude of 100-150 km prior to the expected exhaustion of fuel, which will delay the problem by about 500 years.

Offline Avron

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RE: $28 billion of GEO Sat launches projected
« Reply #24 on: 03/09/2006 03:47 am »
Quote
vt_hokie - 8/3/2006  3:05 PM

Here's something sort of close to what I was looking for that came up in a search:

Geostationary orbit decay and geostationary orbit crowding

The problem of a possible satellite collision due to the geostationary orbit decay is examined in view of the increasing number of geostationary satellites and the hazard of in-orbit exhaustion of fuel. A number of orbital decay mechanisms are outlined, among them electromagnetic drag on a charged satellite, meteorite and micrometeorite collisions, and solar radiation pressure. It is suggested that a geostationary satellite be boosted up to an altitude of 100-150 km prior to the expected exhaustion of fuel, which will delay the problem by about 500 years.

500 years... [Hard hat on]... STS-121 should be launching around then..:(

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