[amsat-bb] PSK v. APRS

[Greg Dober]

Bob,

Guess the APRS dilemma was like splitting the atom.  The real use and the
unintended use.


Could a system like the ISS be switched to a PSK31 or similar mode in the
future?  How well would PSK work with Doppler etc?  I use it on HF, but was
wondering if FM and satellites could be feasible.  I believe this was
mentioned as possibly being part of Fox's system.

73
Greg
N3MVF

-----Original Message-----
From: amsat-bb-bounces at amsat.org [mailto:amsat-bb-bounces at amsat.org] On
Behalf Of Bob Bruninga
Sent: Monday, June 06, 2011 2:41 PM
To: amsat-bb at amsat.org
Subject: [amsat-bb] Re: Broadcasting

> but isn't 99.9% of all APRS broadcasting?  
> You never really expect a response from anyone...
> Most of it is amateurs BROADCASTING their locations, 
> no emergency traffic...

That is simply because too many people were completely mislead into thinking
of APRS as a vehicle tracking system which is just wrong.  It was nothing of
the kind.  It evolved from the 1980's desire to get away from one-on-one
packet BBS's with NO human contact back to HUMAN-to-HUMAN live information
exchange.  

But then in the mid 1990's GPS came out and so did a lot of stupid trackers
and now we are stuck with this light's-on-nobody-home scenario in a lot of
people's minds.  See how wrong these assumptions are:
http://aprs.org/APRS-tactical.html

My focus in APRS has always been about live contact.  That is why now all
new APRS radios not only communicate the position of the other stations, but
also their voice contact frequency in every packet. See:
http://aprs.org/localinfo.html

Bob, Wb4APR

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