[amsat-bb] ISS ping box (now PBBS)

Edson W. R. Pereira ewpereira at gmail.com
Fri Sep 23 12:22:08 UTC 2016

What would be required (from the point of view of paper work, logistics,
approvals, etc.) to replace the current ISS packet radio TNC by a device
that would implement some more efficient digital communications? The device
could be a digipeater, but employing strong FEC and a more modern
modulation and framing structure and perhaps some better scheme for channel
access. Perhaps something similar to ngham.


With FEC and higher speed, we could accommodate many more users on a single
pass. A dedicated software application on the ground would implement the
modem and process information -- separating different types of messages in
different screens, providing a chat like mode for real-time communications,
automatically forwarding APRS packets, etc.

Am I day dreaming?

73, Edson PY2SDR

- We humans have the capability to do amazing things if we work together.
- Nós seres humanos temos a capacidade de fazer coisas incríveis se
trabalharmos juntos.

On Thu, Sep 22, 2016 at 3:11 PM, Robert Bruninga <bruninga at usna.edu> wrote:

> > Andrew, What you should be doing is try using the onboard packet BBS.
> WHAT?!!!  NO!!!
> Packet BBS operation via space was proved to be entirely inoperable,
> impossible total congestion,, inefficient, impractical, wasteful and
> discunctional use of packet via satllites 20 years ago.  That is why all
> operation now uses single packet exchanges using UNPROTO or UI packets and
> why UI messaging was invented.
> All it takes is one person to try to log on, and then the ENTIRE PASS is
> lost to retries and retries and retries.  Nothing is accomplished, and
> rarely if ever does anyone even get logged on.  It is an abomination to
> even think about using the ISS BBS.
> > That way people could read and send you messages.
> > As you're in a low use ISS area this would be ideal for
> > you and other ISS users...
> Oops... nevermind... I see you are on an island thousands of miles from
> any Ham Radio density...
> But again, this will ONLY work over Hawaii, or Australia, or South Africa
> or other areas where packet ISS usage is so low as to be non-existant.  In
> those places, yes, it would be a fun experiment.  BUT ONLY UNTIL others
> heard about it.  Then it would be the same ole' "tradgedy of the
> commons"... (google it)...  Everybody tries and it fails for everyone....
> And a disaster if anyone tried it over the USA or Europe.
> Bob, WB4APR
> -----Original Message-----
> > If you're the only station out there, then what's the point of
> transmitting at all?
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