RE: [amsat-bb] New amateur satellite ideas

["Robert McGwier" <rwmcgwier@xxxxxxxxxxx>]

Without going into a tremendous amount of detail why, etc., for the
time being,  I am in charge of transponders for Eagle.  Others are
holding positions or have positions of project technical leadership,
and project management and I for one hope that all shakes out and
settles down before the annual meeting.  Phil, Tom Clark, Rick
Hambly, and I presented a top level view of what we might do for
a useful digital transponder for C band and what it might ental.  There is
a lot of work to be done on the ground elements as well as the
spacecraft elements.  The reasons for my being shoved forward
with a electric cattle prod in my back for the transponders will
become clearer as the project leadership tells the story of where
we are headed for now, and that is likely to be at the annual
meeting.  Suffice it to say, it is ambitious, it is forward looking,
and the team appears to be excellent with new faces, old faces,
and I encourage others to become involved.  If few Mbps >= 20,
then your hardware might be interesting and we would certainly
look at it.  If we cannot achieve what we want at 20 Mbps,
then we might drop back in speed but that is the design goal.
I am using the USRP (which is remarkably similar to what you
have proposed and talked about on this forum earlier) as a slower
speed version to do experimentation and development.  Even the
DC and AM broadcast band experiments (2m, 70cm, etc.) have a
very interesting twist.  Come to the ANNUAL MEETING and if you cannot,
order copies of the proceedings.

Caveat:
AMSAT-NA is an equal opportunity exploiter ;-) and the more warm
bodies there are to exploit the better.

Bob
N4HY


-----Original Message-----
From: John B. Stephensen [mailto:kd6ozh@verizon.net]
Sent: Sunday, August 01, 2004 7:04 AM
To: Robert McGwier; amsat-bb@AMSAT.Org
Subject: Re: [amsat-bb] New amateur satellite ideas


Its good to hear that work is proceeeding. I was worried after checking Phil
Karn's web site and seeing that it hadn't been updated in two years.

A few months ago I volunteered as the ARRL HSMM RMAN UHF project leader and
am
busy with the development a DSP-based transceiver for high-speed digital
communication. The design will be published in QEX starting in the
November/December issue. For terrestrial links, an OFDM modem will be
implemented. However the hardware is completely programmable and could be
used
to implement a PSK or FSK link at a few MBPS. It would be nice if hams
interested in satellites and HSMM could have interoperable hardware.

I let my AMSAT membership lapse so I haven't received the AMSAT Journal in
the
past year and I couldn't find much information on the current web site. Who
is
the best person to contact to talk about coordinating efforts?

73,

John
KD6OZH
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