[amsat-bb] Re: check out the amsat web site.
Alan P. Biddle
APBIDDLE at mailaps.org
Sat Oct 7 15:04:37 PDT 2006
Interesting list of transmitters.
AMSAT Board of Directors Approves Eagle Communications Payloads
AMSAT's Board of Directors met on 5 October in San Francisco, CA and
approved the following Eagle communications payloads:
* A SSB/CW (etc.) transponder with uplink on U-band and downlink on
V-band. System design has a goal that it be usable over 75% of the orbit by
an AO-13 or AO-40 capable ground station.
* A SSB/CW (etc.) transponder with uplink on L-band and downlink on
S1-band (2.4 Ghz). An AO-13 or AO-40 capable ground station will be able to
use this payload.
* A low rate text message system, like SMS. It will operate on U/V-bands
and be usable over 75% of the orbit by a small terminal on the ground.
* These transponders will be implemented using Software Defined
Eagle will also carry an advanced communications payload (ACP). Using
advanced signal processing and RF techniques, the ACP will allow:
* Voice communications on S2-band (3.4 Ghz) uplink and C-band (5.8 Ghz)
downlink using a single 60cm dish. The satellite antennas will be
electrically steered to reduce spin modulation and allow use over 75% of the
* An additional, fix-pointed, uplink will be available at L-band. This
L-band uplink will require a separate uplink antenna at the ground station.
* High rate data communications, such as streaming video, using a 2m
dish on S2/C bands.
* AMSAT will develop and make available an affordable ground segment for
the ACP System.
Additional information will be posted here in the near future.
More information about the AMSAT-BB