[time-nuts] Antenna for t-bolt

Azelio Boriani azelio.boriani at screen.it
Tue Apr 3 19:27:26 UTC 2012


Of course the elevation mask is only software and doesn't prevent the bad
signal from entering the antenna but then the signal will not despread and
should cause no harm to the computations.

On Tue, Apr 3, 2012 at 9:19 PM, <shalimr9 at gmail.com> wrote:

> The elevation angle filter is based on the satellite position, not the
> actual direction the signals come from.
>
> If you have reflections and multipath, but the satellite is otherwise high
> in the sky, you are out of luck regardless of elevation angle filter.
>
> Of course, the higher the sat, the less likely you will have reflections
> from roofs and such, so it is definitely not useless, but it is not the
> same as having a good antenna in the first place.
>
> Didier KO4BB
>
> ------Original Message------
> From: Hal Murray
> Sender: time-nuts-bounces at febo.com
> To: Time-Nuts
> ReplyTo: Time-Nuts
> Subject: Re: [time-nuts] Antenna for t-bolt
> Sent: Apr 3, 2012 12:15 AM
>
>
> caf at omen.com said:
> > Presumably a timing antenna would block low elevation signals to reduce
> > multipath.
>
> Maybe, but there is a software aspect to the filter.  You get to select the
> elevation angle.
>
> I don't remember seeing any specs about the filtering angles of various
> antennas.  Has anybody seen something like that?
>
>
> --
> These are my opinions, not necessarily my employer's.  I hate spam.
>
>
>
>
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