[amsat-bb] Re: L band uplink frequencies

Fabio A. IZ5XRC iz5xrc at gmail.com
Fri May 18 02:50:01 PDT 2012

I think the suggestion is still valid, the "alternative" proposal, being at
the band edge, may be useful to minimize any possible interference.
The attached pictures might help

The E6 band is located between 1260-1300MHz, centered at 1278.75MHz,
it is not an Aeronautical Radio Navigation Service (ARNS) band, GPS is not
broadcasting its signal in that band also.
Anyway, E6 band is dedicated to commercial services (CS) and that must be
taken into account.

To read further, one interesting reference is: The Radio Science Bulletin
(URSI) N.330 - SEP 2009

Hope that helps

(ex iw8qku)

> Hi all.
> I am trying to determine an FM uplink frequency in L band which is
> suitable for most countries.
> As I understand it, 1269 is the traditional frequency of choice,  but with
> Galileo now being deployed and some local EIRP restrictions here in Europe,
> that may no longer be the best choice.
> In searching the AMSAT archive I saw several messages about the P3E
> 'galileo alternative' at 1260 and a message saying that there is an EIRP
> limit in Germany below 1263MHz. - Is that still accurate? The final
> suggestion from those posts was 1263.520
> Ultimately some frequency agility to avoid radars etc may be needed, but
> as with all projects, a starting point is needed. Any thoughts?
> Many thanks
> David  G0MRF
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