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RapidEye ready for launch



 
 
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  #11  
Old August 30th 08, 12:02 AM posted to sci.space.policy
Jake McGuire
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Posts: 99
Default RapidEye ready for launch

On Aug 29, 1:34*pm, Fred J. McCall wrote:
Jake McGuire wrote:
: Commercial imagery, on the other hand, will soon be offering 0.5 meter
: images from GeoEye-1. *You can currently buy 100 square miles of 1
: meter imagery from the Ikonos bird for less than $1,000.
:
:But no matter how much you pay GeoEye, you can't get them to give you
:new pictures of a 100 mile square area every day for a week.
:

True, since the revisit time of a single bird is on the order of 72
hours. *But what do you need that for?


You're right. Clearly there is no military advantage to having a
picture of what was over the hill this morning as opposed to what was
over the hill three days ago. I don't know what I could have possibly
been thinking.

-jake
  #12  
Old August 30th 08, 12:39 AM posted to sci.space.policy
Rick Jones
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Posts: 685
Default RapidEye ready for launch

Fred J. McCall wrote:
True, since the revisit time of a single bird is on the order of 72
hours. But what do you need that for?


Since the resolution isn't all that good for things directly military
a few pseudo-random guesses:

*) daily progression of a:
- forrest fire
- deforrestation
- lake filling/draining behind a dam
- herd migration (probably won't see individual animals but still
see the herd)
- locust swarm
- storm (do all parts of the earth have good weather satellite
coverage?)
- largish building being constructed
- strip mine

rick jones
--
oxymoron n, commuter in a gas-guzzling luxury SUV with an American flag
these opinions are mine, all mine; HP might not want them anyway...
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...
  #13  
Old August 30th 08, 03:52 AM posted to sci.space.policy
Fred J. McCall
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Posts: 5,736
Default RapidEye ready for launch

Jake McGuire wrote:

:On Aug 29, 1:34*pm, Fred J. McCall wrote:
: Jake McGuire wrote:
: : Commercial imagery, on the other hand, will soon be offering 0.5 meter
: : images from GeoEye-1. *You can currently buy 100 square miles of 1
: : meter imagery from the Ikonos bird for less than $1,000.
: :
: :But no matter how much you pay GeoEye, you can't get them to give you
: :new pictures of a 100 mile square area every day for a week.
: :
:
: True, since the revisit time of a single bird is on the order of 72
: hours. *But what do you need that for?
:
:You're right. Clearly there is no military advantage to having a
icture of what was over the hill this morning as opposed to what was
ver the hill three days ago. I don't know what I could have possibly
:been thinking.
:

Which brings us back to resolution.

A tank is a single pixel in imagery with that resolution. You can't
bloody tell what is over the hill that's different because the
resolution is too poor for militarily significant objects to show up.

Yeah, I don't know what you were thinking, either.

--
"Ignorance is preferable to error, and he is less remote from the
truth who believes nothing than he who believes what is wrong."
-- Thomas Jefferson
  #14  
Old August 30th 08, 03:53 AM posted to sci.space.policy
Fred J. McCall
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Posts: 5,736
Default RapidEye ready for launch

Rick Jones wrote:

:Fred J. McCall wrote:
: True, since the revisit time of a single bird is on the order of 72
: hours. But what do you need that for?
:
:Since the resolution isn't all that good for things directly military
:a few pseudo-random guesses:
:
:*) daily progression of a:
: - forrest fire
: - deforrestation
: - lake filling/draining behind a dam
: - herd migration (probably won't see individual animals but still
: see the herd)
: - locust swarm
: - storm (do all parts of the earth have good weather satellite
: coverage?)
: - largish building being constructed
: - strip mine
:

All those are good thoughts. None of them are military applications
(which is what was being discussed).

--
"Rule Number One for Slayers - Don't die."
-- Buffy, the Vampire Slayer
  #15  
Old August 30th 08, 07:35 PM posted to sci.space.policy
Pat Flannery
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Posts: 18,465
Default RapidEye ready for launch



Jake McGuire wrote:
Less than one cubic meter, according to RapidEye.


Does that solar array on the side deploy once on-orbit?


Pat
  #16  
Old September 2nd 08, 07:01 PM posted to sci.space.policy
Rick Jones
external usenet poster
 
Posts: 685
Default RapidEye ready for launch

Fred J. McCall wrote:
Rick Jones wrote:
:Since the resolution isn't all that good for things directly military
:a few pseudo-random guesses:
:
:*) daily progression of a:
: - forrest fire
: - deforrestation
: - lake filling/draining behind a dam
: - herd migration (probably won't see individual animals but still
: see the herd)
: - locust swarm
: - storm (do all parts of the earth have good weather satellite
: coverage?)
: - largish building being constructed
: - strip mine
:


All those are good thoughts. None of them are military applications
(which is what was being discussed).


If you can see the herd of animal can you also see the "herd" of
military vehciles - although not know what they are specifically?

The largish building being constructed could be anything from a new
sports center to a new centrifuge plant?

Increase in tailings piles from a mine could be increase in spoil (?)
from an underground complex being dug.

A road being built in the middle of nowhere.

Trenching or pylons for high voltage power lines running to nowhere.

Probably none of them would be very good for detecting nefarious
tactical porpoises, but they might be "OK" from a more strategic view?
It is probably rather more "spoofable" than other things up there.
Still, suitability may be relative to someone's current imaging
abilities?

rick jones
--
oxymoron n, Hummer H2 with California Save Our Coasts and Oceans plates
these opinions are mine, all mine; HP might not want them anyway...
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...
 




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