09-18-2012, 10:18 PM
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Join Date: Jul 2011
Location: Planet Texas
900 MHz doesn't have "ground propagation" like AM broadcast 500 Khz to 1500 KHz.
In theory 500 foot at both ends will give you line of sight clearance, but they have to be higher for Fresnel zone clearance, and on has to be 20 % even higher to avoid direct out-of-phase reflection.
Reflectors only increases the gain, it won't overcome the above problem.
High latency satellite, or nothing at all...Pick one.