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Technology Stocks : The *NEW* Frank Coluccio Technology Forum -- Ignore unavailable to you. Want to Upgrade?

To: Frank A. Coluccio who wrote (4618)	12/15/2001 12:43:16 PM
From: elmatador	Read Replies (1) \| Respond to of 46821

It will be matter of cost efficiency: The cheapest medium is tape in $per MB basis. But CD's may be the lighter and may be preferable since the most important is to keep the payload light. The company has to built two satellites since one may go astray in a useless orbit. Then we have to have a satellite ready to shoot up in case the one up there fails. Or we can keep both up there hot standby and we would be backing up both of them, and switching from one and another to see that both are performing according to the standards of quality we set. The mechanics can easily sort the details.

To: Frank A. Coluccio who wrote (4618)	12/16/2001 10:37:07 AM
From: Peter Ecclesine	Respond to of 46821

Hi All, This optical satellite data link [like a Brush drum recorder] was postulated in the mid-'70s, with three synchronous satellites and a central US uplink/downlink station. With today's WDM, the capacity would be about 175,000 miles/186,000 miles per second times the number of colors, times the bits per second/color [22,500 miles sync orbit + 4000 miles earth radius => 43,300 miles sat to sat, and 45,000 miles sat/earth/sat totals 175k miles] ~~ .94 * 1024 * 10,000,000,000 = 9.63 trillon bits with 1024 colors of 10Gbps per color Maybe not worth building. [How much disk storage does WalMart have? I misremember many petabytes] petere