There are a number of options when it comes to terrestrial wireless. One example is right here in my home town of Denver, Colorado. There is a large microwave radio on a rooftop in downtown Denver which fires at a blank billboard on the side of a mountain along the I-70 valley. This billboard in turn reflects the signal down into the town of Idaho Springs where it has been the sole source of telecommunications connectivity for many years. To answer the question more generally; no, it does not always need to be line of site. There are various ways to take advantage of the various properties of reflection, refraction and diffraction. If mountains are the problem you could build a (or several) solar powered active relay station(s) to connect communities on both sides (never rule out multiple hops - there is a lot that can be done there). If it is simply long expanses of ocean (or desert), there are frequencies which will follow the curvature of the earth, etc...<br>
<br>I assume that this has been researched in some detail but there may be possibilities that have been overlooked, it may be worth revisiting. Especially when the alternatives are as expensive as they appear to be.<br><br>
~Chris<br><br><br><div class="gmail_quote">On Sat, Apr 12, 2008 at 6:09 PM, WWWhatsup <<a href="mailto:joly@punkcast.com">joly@punkcast.com</a>> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>
One would think this would be the kind of thing the World Bank should fund.<br>
<br>
The Pacific is unique in terms of land mass to area - it's just not<br>
feasible for them to finance their own satellite.<br>
<br>
Question: Does wireless always have to be line-of-sight? Can you not bounce<br>
it off the ionosphere or whatever?<br>
<br>
<br>
joly<br>
<div class="Ih2E3d"><br>
<br>
<br>
Franck wrote:<br>
>Unfortunately, most islands are not in line of sight, and even less<br>
>countries.<br>
><br>
>What Vint suggests is bulk purchase of satellite bandwidth, and avoid<br>
>double hops when connecting amongst islands.<br>
<br>
</div><div><div></div><div class="Wj3C7c">---------------------------------------------------------------<br>
WWWhatsup NYC<br>
<a href="http://pinstand.com" target="_blank">http://pinstand.com</a> - <a href="http://punkcast.com" target="_blank">http://punkcast.com</a><br>
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