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Microcap & Penny Stocks : Globalstar Telecommunications Limited GSAT -- Ignore unavailable to you. Want to Upgrade?

To: Ilaine who wrote (10464)	3/3/2000 4:03:00 PM
From: ccryder	Respond to of 29987

<<Satellite-based services are adversely affected in places where obstructions, such as buildings and other natural and man-made obstacles, are positioned between a satellite and the user. 1.- These adverse effects on satellite calls increase as the obstacles become larger and more densely spaced. 2.- In densely packed urban areas or inside buildings no meaningful satellite voice service is available. 3.- Use of an Iridium phone in a moving automobile for a satellite call makes the effect of obstructions temporary but more pronounced because the structure of automobiles tends to obstruct the satellite signal. 4.- The actual limitations on satellite-based services vary, sometimes significantly, as conditions change and as the satellites move in their orbits.>> G* has some of the same problems as Iridium but several differences exist in the architecture which improve the situation. Here is my response to the four points: The G* phones are first, cell phones. In a city with building obstructions, the phone would use the cell phone infrastructure. Cellular systems often include relay systems inside malls and large buildings to improve operation of cell phones therein. Being out of range of cell phone service usually means you are not in a city so if you have to stay in touch, buy a sat phone or stay in your city. There are cases in a city when the cells are overloaded that a user might switch to the satellite mode. With G, the CDMA signal path diversity afforded by multiple satellites improves the probability of call completion that was impossible with the I approach. The paging feature of I* was (is) a good feature. A lower bandwidth (higher signal to noise ratio) paging signal was included in the I* design. It is probable that this paging capability was not good compared to local paging networks.