[amsat-bb] Galileo 1260-1300 MHz - Protection Radius

[M5AKA]

Thanks Alessio,

It seems we need to start looking for replacement Amateur-Satellite Service spectrum in L-Band. 

The first hurdle is to get IARU agreement on the need for replacement spectrum, hopefully someone from AMSAT-NA is keeping ARRL briefed on the matter since ARRL is a major force within IARU.

Getting the item on the WRC-2018 agenda will be a major challenge since Agenda items are usually defined at the previous conference WRC-2015.


73 Trevor M5AKA
http://amsat-uk.org/2014/08/13/23-cm-band-and-wrc-2018/





On Friday, 22 August 2014, 21:43, Alessio Sacchi <iz4efn at gmail.com> wrote:
 


Interesting. Few weeks back I spoke with a member of the Italian CC, as our
club was going to add a 1296MHz port to a local repeater. He said Alenia Space
has submitted strong warnings regarding possible interference with Galileo
and he anticipated it could be hard to get a frequency assigned in that
portion of the spectrum in the near future.

Alessio IZ4EFN



On Fri, Aug 22, 2014 at 9:29 PM, M5AKA <m5aka at yahoo.co.uk> wrote:

> In a previous post I mentioned a paper written in 2006 which indicated a
> 700 watt ERP amateur station might knock out a users 1260-1300 MHz Galileo
> receiver at a distance of 18 km.
> http://www.southgatearc.org/articles/galileo.htm
>
>
> This may be a considerable underestimate.
>
> Two German ATV repeaters were shut down due to interference to a user's
> Galileo receiver which was being used to evaluate the initial 4 test
> satellites, the repeaters were:
>
> DB0QI which was 18 km from the receiver
>
> and
> DB0ITV which was 55 km from the receiver
>
> My understanding is that both repeaters were running an ERP of just 15
> watts, but I've been unable to confirm that figure.
>
> The first two satellites of the operational Galileo GPS constellation were
> launched today to be followed by the rest over the next 3 years.
>
> Given the substantial investment in these satellites it seems to me likely
> that more European countries will follow the example of Germany and Austria
> and seek to protect the 1260-1300 MHz downlink.
>
> 73 Trevor M5AKA
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