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Technology Stocks : LAST MILE TECHNOLOGIES - Let's Discuss Them Here -- Ignore unavailable to you. Want to Upgrade?

To: Raymond Duray who wrote (12539)	6/5/2003 6:41:34 AM
From: elmatador	Read Replies (1) \| Respond to of 12823

A RF signal will only reach high altitude if it is a omnidrectional antenna. That means the antenna irradiates like a sphere around it. Since a mobile network is designed to make the most useful use of the licensed spectrum, they plan carefully to irradiate only whre their customers are suppsed to be and taking care not to interfere with the next Base Station down the road. Thus the RF siganl is constrained with the are the network is supposed to provide coverage. Such an airplane, can only be covered from satellites. Say three satellites at geo-stationary orbits spaced at 120 degrees in between them, would cover the 360 degrees. Say good coverage over North Atlantic routes, coverage over trans-European routes, covering Intra-Asian European routes, then Pacific routes and then South Atlantic routes. Like this one: computerworld.com INMARSAT has this covering the shipping lines of the world. You can do a Google search in INMARSAT if you want. Hope it helped.