[time-nuts] Rooftop antenna and splitter

[Bob kb8tq]

Hi

The thing I’m not quite understanding here - why in the world use an antenna that needs
a ground plane when you can get one that does not need an external ground plane?  

I have three multi band GNSS antennas on the back of the house. They all get down to 
insane error circles  (like a mm) according to Opus. None of them have or need external 
ground planes. 

The survey guys got away from giant ground planes a long time ago. They seem to be 
quite happy with the results they get. 

Bob

> On Jan 30, 2019, at 12:47 PM, Mark Goldberg <marklgoldberg at gmail.com> wrote:
> 
> Put a "Bird Feeder" on the side of the house.
> 
> Even only seeing less than 1/2 the sky, this is doing OK with just a
> TruePosition L1 GPS, always 7-8 sats. I have room for two antennas on the
> ground plane, only have one and am using an HP 58515A active splitter.
> 
> Hopefully the attachment comes through.
> 
> Regards,
> 
> Mark
> 
> 
> On Wed, Jan 30, 2019 at 10:01 AM Denny Page via time-nuts <
> time-nuts at lists.febo.com> wrote:
> 
>> Thanks Mark. For the cost, this seems like a worthwhile thing to try. I
>> don’t think the homeowners association would be too thrilled about a pizza
>> pan on a pole so I’ll probably have to do without.
>> 
>> Besides, If I mounted a pizza pan I would also endure endless teasing from
>> from my wife who already thinks I’m insane. :)
>> 
>> 
>>> On Jan 29, 2019, at 11:44, Mark Sims <holrum at hotmail.com> wrote:
>>> 
>>> This is the antenna that I am now using.   I do have it mounted over an
>> 18" pizza pan... I don't know if that does any good,  it seemed to work
>> fine without it.
>>> 
>>> 
>> https://www.ebay.com/itm/CORS-RTK-GNSS-Survey-Antenna-high-gain-measurement-GNSS-GPS-GLONASS-BDS/253786590956?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
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