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Re: Phase 4



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
Geo.
To include the need to use high squint angles and power levels required
on both
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@gmail.com>
writes:
> We have kept Eagle satellite alive.  The lab at U. Md. ES is being 
> built 
> out and we are going ahead with the structure.  We helped fund the 
> completion of P3E  with our international  partners and stepped up 
> our 
> 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.
> 
> Bob
> 
> 
> 
> 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 
> geostationary
> > satellite with amateur radio has to provide tangible support for 
> government
> > 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 
> via
> > 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@amsat.org. Opinions expressed are those of the 
> author.
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> 
> 
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