[FOSS-GPS] Good antenna

[Danny Miller]

Really?  I thought helix antennae were poor choices because they accept 
signals at low angles.  In fact the article makes a point of saying it 
accepts low-angled signals.

 From satellites coming in at only 5 deg above the horizon, they're 
prone to distortion from the atmosphere and ground obstacles.  Now the 
software can just refuse to use those satellites because it knows the 
angles from the ephemeris data.

But as I understand it, a lot of the multipath reflections- delayed 
versions of the original signal bouncing off things- often comes in at a 
low angle, so the antenna rejecting the low-angled reception will help.  
These signals traveled a longer path and only distort the pseudorange.  
Since this is a feature of the antenna, software can't just elect to 
reject these signals- and it if could, it would.

Danny

On 3/11/2014 1:10 AM, Anton Strydom wrote:
> Hi Max
>
> Have a look at the attached, this is what I started off using it with 
> a U-Blox 6 T receiver
>
> Regards
>
> Anton
>
>
> On Tue, Mar 11, 2014 at 7:52 AM, mazahirp 
> <mazahir.poonawalla at gmail.com <mailto:mazahir.poonawalla at gmail.com>> 
> wrote:
>
>     Hi All,
>
>     Can anyone help me to buy a good antenna which can give me
>     accurate results.
>     I am using u-blox 6T as receiver and RTKLIB.
>     Currently I am using GILSON GPS active antenna on both the
>     receivers (base
>     and rover). I am not an expert into antennas so I wanted to know
>     if this
>     antenna is good enough? If not, which one should I go for. My
>     budget is
>     around $100.
>
>     Thanks for the help.
>
>     Cheers,
>     Max
>
>
>
>     --
>     View this message in context:
>     http://open-source-gps-related-discussion-and-support.1099874.n2.nabble.com/Good-antenna-tp7572830.html
>     Sent from the Open Source GPS-related discussion and support
>     mailing list archive at Nabble.com.
>     _______________________________________________
>     This message is sent to you from FOSS-GPS at lists.osgeo.org
>     <mailto:FOSS-GPS at lists.osgeo.org> mailing list.
>     Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage
>     your subscription
>     For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS
>
>
>
>
> _______________________________________________
> This message is sent to you from FOSS-GPS at lists.osgeo.org mailing list.
> Visit http://lists.osgeo.org/mailman/listinfo/foss-gps to manage your subscription
> For more information, check http://wiki.osgeo.org/wiki/FOSS-GPS

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/foss-gps/attachments/20140311/d1d1f3cd/attachment.html>