[amsat-bb] New Outernet L-Band service...
daniel at destevez.net
Sat Oct 15 11:36:21 UTC 2016
El 15/10/16 a las 00:35, Dave Hartzell escribió:
> I hope someday a service like this will be available from an AMSAT
> geostationary service.
I'm pretty confident that the guys at AMSAT-DL are capable of doing this
much better on the upcoming EsHail'2 than what Outernet is currently
doing on Inmarsat (unfortunately not worldwide coverage).
They already have in mind a "DVB-S beacon", which is a DVB-S signal that
is broadcast from the ground station at Qatar and through the wideband
Amateur transponder. They plan to put informational videos about Ham
radio and Ham radio events on this signal. They could also include some
data stream if there is enough interest.
What is more, if you have equipment to operate EsHail'2 on SSB, it's
more or less easy to use either the narrowband transponder or the
wideband transponder to transmit an Outernet-type signal through
EsHail'2, so anyone can have a go with this.
Outernet uses 4200baud BPSK and half of the bitrate is spent for FEC.
You can use a bit less bitrate to get a signal that will even pass
through a conventional 2.7kHz SSB filter and you can use less bits for
FEC to get increased data throughput (at the cost of a bit more SNR
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