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BPS antenna; High or Low mount??

Old 04-18-2008, 02:55 PM
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Default BPS antenna; High or Low mount??

Does it matter at all? I also have a radar installed on the same hardtop...
Old 04-18-2008, 06:50 PM
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Default Re: BPS antenna; High or Low mount??

Do you mean GPS antenna? If so, the GPS antenna should not be in the radar beam. The radar beam is usually 20 to 30 degrees in the vertical direction. If the antennas is below or above this plane it will be fine. I have long mounted the GPS antennas below the radar which is on a 12 to 14" pedistal and about 4 feet out from the radar with no problems .
Old 04-18-2008, 09:42 PM
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Default Re: BPS antenna; High or Low mount??

GPS antennas only need a clear view of the sky. Height is totally unimportant as the transmitters are in orbit around the planet. From a satellite point of view, there is no difference in ground level and 1,000 feet.

What was said about radar is 100% true. Radar signals are close in frequency to GPS signals and will overload the GPS receiver. Most radar / GPS setups I see mount the GPS on a short pole that goes just over the radar.

Anyway, if after mounting the GPS antenna if you can not get a lock on any birds, move the antenna till you do.

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