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Technology Stocks : WDC/Sandisk Corporation

WDC 160.09

+1.9%

11:49 AM EST

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To: Craig Freeman who wrote (1952)	12/5/1997 11:28:00 AM
From: Michael Dunn	Read Replies (2) of 60323

OFF TOPIC <<Specialty films used by the Feds can resolve items the size of a dime from satellite altitudes.>> FYI-the ability of the US govn't to image something the size of a dime from a satellite is IMO an urban myth. Resolution from space is limited by satellite optics, detector size, and several other parameters. They would use a CCD to image in the visible spectrum. Assuming an orbit at 400km with a satellite imaging in the middle of the visible spectrum at ~500 nanometers, with a dime being ~1.5 cm in size it would take an optic ~16.5 meters in diameter to resolve a dime. There are no launch vehicles that can carry this optic up in one piece (The shuttle is way to small). IMO the government needs ideal conditions and systems just to image a person from space. Now with a U2 flying at 20 km...... ;) Mike

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