[OZAPRS] RE: Findu cant find me..

[Robert Bruninga]

Im not sure of a simple method.
Oh yes! there is, .... nah that wont work...  anyway, here are
my thougts but all require some code to be written?

1) have the SGATE digipeater, not digipeat, but only
regenerate the packet into the 3rd party format.  Thus
the packet remains intact as the SGATE heard it.

Problem is that most IGATE sofftware (against my
recommendations for years) uses the 3rd party
format as a convenient filter to prevent IGATE loops.
(what they should be doing is filtering based on 
the presence of TCPIP or PCPXX in the header,
NOT simply the presence of 3rd party format.  MAYBE
they have begun to fix this problem.  I hope so).

2)a full duplex audio link over to the IGate so it
hears the packet direct (this is just to hardware
intensive)

3)Software at the nearby IGate that has a list of
trusted agents (SGATES) and when ever it sees
a packet that came to it VIA SGATE* , that
it then ASSUMES that the previous link
(RS0ISS-3*,SGATE) was valid and corrects
the packet before forwarding.  Thus the only
potential for error is if the SGATE accidentally
tunes his receiver on to the terrestrial freq.

But this is far more reliable than all the potential
mistakes users can make if they aacidently
use their radio terrestrailly without changing
the fake RS0ISS* in their status text...

Just some thoughts...
Bob

>>> noel-r at clear.net.nz 3/16/04 10:33:56 PM >>>
Bob,

Thanks for understanding the method in our madness, in doing things the
way
we do.  It is a means to an end.

There is a plea on the ARISS site for more interest in providing
gateways,
and as Tony said, high speed and always on internet access is not
widely
available in ZL, or I gather VK, at low cost.   We have a telco
monopoly on
lines here in ZL, and they can do more or less as they please.

Given that most of us interested in providing the satellite APRS
gateways
here in ZL, and also it seems in VK, dont have direct internet access
but
link via RF to those sites that do, the question is : how can we
arrange the
signals so that (1) the ARISS type servers recognise our beacons etc
as
having come via the correct path from space, and (2) the integrity is
not
compromised?

Whilst I have no trouble with knowing that what I am personally doing
is
only forwarding genuine traffic, I take your point that this may in
other
cases not be so.  I raised the issue of the lost beacons, due to
terrestial
handling, with Steve Dimse about a year ago, but I think that to him I
was
just a voice in the wilderness.  Our current method of adding the
callsign
and asteric as a comment may be a good (for us) short term solution,
but is
there a better long term one?

Noel, ZL3GR.



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