[amsat-bb] Re: Antenna
bruninga at usna.edu
Sun Aug 19 13:43:27 PDT 2012
> Also, I think Bob Brunniga... has documented that
> 15 deg fixed is the best overall el setting.
Yep, that puts the main beam on the horizon where you need it most and where satellties spend over 70% of their time. Even at 15 degrees, you still are within 1 dB of max gain on the horizon. That same amount of gain covers up to 30 degree too. And anything above 30 degrees is 6 to 10 dB CLOSER and does not need much gain. Above 70 degres there begins to be a null, but satellites will be in that null less than 1% of the overall contact time.
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