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To: CF Rebel who wrote (1328)	7/14/1999 1:59:00 PM
From: Robert Sheldon	Read Replies (1) \| Respond to of 15615

It must have distance limitations for various atmospheric conditions. If I remember correctly, the April 1998 issue of Scientific American discusses this issue ad nauseum. The conclusion was that terrestrial wireless was simple compared to satellite related systems. In other words, the time would come when these perceived problems would be solved. LMDS originally was berated because detractors insisted that thunder cells would disrupt communications. TGNT proved them wrong over the last 12 months with successful tests in Houston and rollout of their system in ~30 locals. Apparently LU has taken wireless broadband to the next level. Concerns regarding atmospheric conditions are probably a bug of the past.

To: CF Rebel who wrote (1328)	7/14/1999 2:22:00 PM
From: Frank A. Coluccio	Read Replies (1) \| Respond to of 15615

CF Rebel, Rain and snow are but the most obvious. What about ticker tape parades, window washers, vibrations on the parapet due to heavy truck traffic in the street (very tight tolerances on optical beams must be maintained), pigeons, scintillation, fog, foliage that crops up unexpectedly out of nowhere, (oil rigs which suddenly actuate out of nowhere - the latter actually happened in Southern Cal to an associate), eye damage to sightseers using binoculars and other optics-intense viewing devices, orientation towards the Sun that must be avoided at all times of the day, the list goes on. For this to work properly in tight urban areas there must be quite a bit of coordination between adjacent building owners to agree to certain roof provisions. Beyond being only several buildings apart this could wind up being a crap shoot, at best. There must be very secure provisions in place, like a very high vantage point on a tower which is outside the reach of the man-made elements I listed above. And all of the planets and stars (but not the Sun) must be aligned just right, consistently. Just some thoughts from someone who's been there before, and who has been known to shew away a pigeon or two in his day. And who has on occasion said "damn" to those ticker tape parades. Regards, Frank Coluccio