Like a space transponder ?
----------------------------- Sent from my iPhone Andrew Rich e vk4tec@tech-software.net w www.tech-software.net m 0419 738 223
On 23 Sep 2016, at 22:22, Edson W. R. Pereira ewpereira@gmail.com wrote:
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.
https://github.com/skagmo/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@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
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Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb