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Re: Satellite-to-Satellite communications



The atmosphere is transparent at the frequencies being used.

73,

John
KD6OZH

----- Original Message -----
From: "Christensen, Eric" <CHRISTENSENE@MAIL.ECU.EDU>
To: "John B. Stephensen" <kd6ozh@comcast.net>; <amsat-bb@AMSAT.Org>
Sent: Monday, January 09, 2006 02:06 UTC
Subject: RE: [amsat-bb] Satellite-to-Satellite communications


> Why would it be the same power going sat-sat as ground-sat?  I would think
> that there would be less power needed as you aren't going through the
> atmosphere.  This is just an assumption, though.
>
> Eric KF4OTN
>
>
>
> From: John B. Stephensen
> Sent: Sun 08-Jan-06 19:26
> To: Christensen, Eric; amsat-bb@amsat.org
> Subject: Re: [amsat-bb] Satellite-to-Satellite communications
>
>
> No intersatellite communications is planned. Intersatellite links would
> require just as much power as the satellite-to-ground links. The satellite
> would also have to be 3-axis stabilized to point the intersatellite
> antennas. The additional power and fuel would double or triple the weight
> and launch cost. The majority of AMSAT membership has been very clear that
> it wants simpler, cheaper HEO satellites so that more can be launched.
>
> When 2 or more HEO satellites are in orbit, Earth-based intersatellite
links
> will be possible at a fraction of the cost of space-based links.
>
> 73,
>
> John
> KD6OZH
>
> ----- Original Message -----
> From: "Christensen, Eric" <CHRISTENSENE@MAIL.ECU.EDU>
> To: <amsat-bb@amsat.org>
> Sent: Sunday, January 08, 2006 18:05 UTC
> Subject: [amsat-bb] Satellite-to-Satellite communications
>
>
> > I was sitting here reading the Nov/Dec AMSAT Journal thinking about
Eagle
> and
> > P3E when it hit me.  Are their any sat-to-sat circuits being built into
> these
> > satellites?  If we are going to have daily coverage of a HEO by 2009 and
> > continuous coverage by 2012 I think having the additional sat-to-sat
> circuits
> > would be very useful for providing worldwide coverage.
> >
> > Uncle Sam finally figured that out with the new MilStar sats.  Otherwise
> data
> > had to be relayed by ground stations between satellites to cover the
area.
> >
> > Any ideas???
> >
> > 73s,
> > Eric KF4OTN
> > ----
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> > Not an AMSAT member? Join now to support the amateur satellite program!
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> ----
> Sent via amsat-bb@amsat.org. Opinions expressed are those of the author.
> Not an AMSAT member? Join now to support the amateur satellite program!
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----
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