Quote:
On 2002-04-24 07:30, Kaptain K wrote:
The KH series (Keyhole) spy satelites are very closely related to the Hubble.
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After Hubble was launched, they found that there were steadiness problems because the solar arrays would expand and contract as Hubble went in and out of the Sun (as it did every 90 minutes), shaking the satellite slightly. They pointed out the problem to the folks who worked with the KH satellites, and they said, "Well, yes, we know about that." It wasn't a problem with the KH satellites because they took such short exposures - for Hubble it was a real issue and one of the reasons the arrays were replaced early on.