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Radio interferometry is a technique for studying details of

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Radio interferometry is a technique for studying details of [#permalink] New post 24 Jul 2006, 08:47
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A
B
C
D
E

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Radio interferometry is a technique for studying details of celestial objects that combines signals intercepted by widely spaced radio telescopes. This technique requires ultraprecise timing, exact knowledge of the locations of the telescopes, and sophisticated computer programs. The successful interferometric linking of an Earth-based radio telescope with a radio telescope on an orbiting satellite was therefore a significant technological accomplishment.

Which of the following can be correctly inferred from the statements above?

(A) Special care was taken in the launching of the satellite so that the calculations of its orbit would be facilitated.
(B) The signals received on the satellite are stronger than those received by a terrestrial telescope.
(C) The resolution of detail achieved by the satellite-Earth interferometer system is inferior to that achieved by exclusively terrestrial systems.
(D) The computer programs required for making use of the signals received by the satellite required a long time for development.
(E) The location of an orbiting satellite relative to locations on Earth can be well enough known for interferometric purposes.
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 [#permalink] New post 24 Jul 2006, 09:14
IMO, this should be E.

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 [#permalink] New post 24 Jul 2006, 09:21
one more E..

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CR -- Radio interferometry [#permalink] New post 24 Jul 2006, 09:23
Actually, it can be perceived as a choice between D and E...

since D states "Computer programs....required a long time.." - My reasoning is that a long time for development does not necessarily mean sophisticated as mentioned in the text...

So i go with E...

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Re: CR -- Radio interferometry [#permalink] New post 24 Jul 2006, 10:17
(A) Special care was taken in the launching of the satellite so that the calculations of its orbit would be facilitated. not stated in the passage
(B) The signals received on the satellite are stronger than those received by a terrestrial telescope. using Poe this should be the one
(C) The resolution of detail achieved by the satellite-Earth interferometer system is inferior to that achieved by exclusively terrestrial systems. no
(D) The computer programs required for making use of the signals received by the satellite required a long time for development. not stated
(E) The location of an orbiting satellite relative to locations on Earth can be well enough known for interferometric purposes. not indicated

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 [#permalink] New post 24 Jul 2006, 10:41
I too bat for B.
The argument says that the successful linking was a technological accomplishment, which means it is something superlative than what already exists. This is properly indicated by B. Hence my choice.
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 [#permalink] New post 24 Jul 2006, 11:48
E.

The argument says "This technique requires ultraprecise timing, exact knowledge of the locations of the telescopes, and sophisticated computer programs"

BTW, what does IMO mean?

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 [#permalink] New post 24 Jul 2006, 12:29
rnachloo wrote:
BTW, what does IMO mean?


IMO: In My Opinion. :wink: :wink:

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 [#permalink] New post 24 Jul 2006, 16:17
OA = E.
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Re: CR -- Radio interferometry [#permalink] New post 24 Jul 2006, 16:38
mailtheguru wrote:
Radio interferometry is a technique for studying details of celestial objects that combines signals intercepted by widely spaced radio telescopes. This technique requires ultraprecise timing, exact knowledge of the locations of the telescopes, and sophisticated computer programs. The successful interferometric linking of an Earth-based radio telescope with a radio telescope on an orbiting satellite was therefore a significant technological accomplishment.

Which of the following can be correctly inferred from the statements above?

(A) Special care was taken in the launching of the satellite so that the calculations of its orbit would be facilitated.
(B) The signals received on the satellite are stronger than those received by a terrestrial telescope.
(C) The resolution of detail achieved by the satellite-Earth interferometer system is inferior to that achieved by exclusively terrestrial systems.
(D) The computer programs required for making use of the signals received by the satellite required a long time for development.
(E) The location of an orbiting satellite relative to locations on Earth can be well enough known for interferometric purposes.


E it is for me, though I see I'm late.

Here are the things that make this a significant accomplishment:

1. ultraprecise timing
2. exact knowledge of the locations of the telescopes
3. sophisticated computer programs

A: We need to calculate its orbit, if it was launched with special care or not is irrelevant. Out
B: nothing mentioned about relative strengths of satellites. out.
C: no comparision between this interferometer, and other ones. out
D: the computer programs were sophisticated, but nothing indicates that they took a long time to develop.
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 [#permalink] New post 24 Jul 2006, 20:54
Clear winner E.

This technique requires ultraprecise timing, exact knowledge of the locations of the telescopes, and sophisticated computer programs

The bolded part gives us the answer.
  [#permalink] 24 Jul 2006, 20:54
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