[amsat-bb] Re: Phase 4
k0vty at juno.com
Tue Oct 30 18:58:08 PST 2007
Hi Robert (N4HY)
I have been reading all the info on the BB about what appears to be a Geo
syncronous amateur system supported by a commercial bird.
Obviously you and others have done much work to understand this scheme
in order to develop support for it.
My problem is I do not have enough to really handle this issue as a Amsat
Coordinator and was not able to attend the symposium.
Being an uninformed Amsat Coordinator is not healthy for Amsat.
Is a system level proposal for this new Phase 4 going to be provided with
sufficient numbers to allow membership evaluation before any impact on
the Eagle system effort is considered acceptable.
A question that needs an answer as I have already been asked.
Will an analysis of the effects on the HEO DXCC desires of the membership
as to the effect of a stationary fixed aperture antenna pattern in Geo
versus a moving satellite location fixed aperture antenna system not in
To include the need to use high squint angles and power levels required
ends of this sort of link budget.
Sorry I did not attend the symposium.
Joe Murray K0VTY
Amsat # 860
Amsat area Coordinator NE
On Tue, 30 Oct 2007 20:22:45 -0400 Robert McGwier <rwmcgwier at gmail.com>
> We have kept Eagle satellite alive. The lab at U. Md. ES is being
> out and we are going ahead with the structure. We helped fund the
> completion of P3E with our international partners and stepped up
> efforts to finish the IHU-3 for them (and us.
> The Eagle satellite structure build out is funded and slated for
> completion in 2008.
> We are really going to try to get P3E a ride on Intelsat to balance
> against the other offers to see what is best for AMSAT-DL and us.
> Stefan's analysis is correct. Any one geostationary bird can cover
> roughly a third of the earth.
> Stefan Wagener wrote:
> > Yes,
> > It is a great project and deserves our full support!
> > Having said that we also need to realize, that depending on the
> location of
> > the satellite above the equator we might only have the Americas in
> the foot
> > print. No Europe or Africa and no Asia. Since the first
> > satellite with amateur radio has to provide tangible support for
> > agencies (funding source) it will certainly be primarily centered
> around a
> > North American footprint. That's why we need to keep Eagle alive
> and support
> > Phase 3E.
> > All together they will give us the full package of worldwide DX
> > satellite and reliable high power communication in the Americas.
> > 73. Stefan VE4NSA
> AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL,
> TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair
> An optimist may see a light where there is none, but why
> must the pessimist always run to blow it out? Descartes
> Sent via AMSAT-BB at amsat.org. Opinions expressed are those of the
> Not an AMSAT-NA member? Join now to support the amateur satellite
> n settings: http://amsat.org/mailman/listinfo/amsat-bb
More information about the AMSAT-BB