Re: MSNBC - How a 'safe haven' could help save Hubble

From: Louis Scheffer (lou_at_cadence.com)
Date: 12/09/04 

Date: 8 Dec 2004 22:52:23 -0800

Bill the Cat <bill@the.cat> writes:

>And *any* video-based system is going to require image-recognition software
>that is several orders of magnitude more complex than a lidar-based system
>requires. That, not the hardware, is going to be the main cost driver in
>such systems - and it's also a big source of technical risk.

This is not clear to me. Assuming you are docking with a cooperative
spacecraft, equipping it with a relatively large high contrast target should
make a video system pretty easy. GPS should get you close enough so that
the target is resolved, the dockee can make sure the target is illuminated.
Then if the target is designed with video in mind it should be simple to get
range, range rate, and orientation from a sequence of frames.

If the spacecraft is not designed with this in mind, or not cooperative,
then I agree that video could be difficult to design and test.

    Lou Scheffer

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