[amsat-bb] Re: ANDE - ISS dual hop?
bruninga at usna.edu
Wed Dec 5 09:57:46 PST 2007
> So if a packet is heard on the first hop, the
> second hop will be ignored as far as the
> FINDU.COM data base is concerned.
> So you have to either parse the entire live
> APRS data stream for these packets, or look
> at your own TNC logs to see them.
OOPS, I was wrong on that sentence too. Since all the Igates
feed APRSservers, and the servers also eliminate all dupes, then
the only way to see a dual hop-packet is for someone to capture
it in their local RF log or for the equally improbable
occurrence that the first hop was not heard by ANY Igate
anywhere. (the product of two unlikely events). So do not
expect to find dual hops captured on any web pages except for
That's another reason I wanted a dedicated server just for
> -----Original Message-----
> From: amsat-bb-bounces at amsat.org
> [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Robert
> Sent: Wednesday, December 05, 2007 12:06 PM
> To: 'Ransom, Kenneth G. (JSC-OC)[BAR]'; 'Joe Veldhuis';
> amsat-bb at amsat.org
> Subject: [amsat-bb] Re: ANDE - ISS dual hop?
> Also the global APRS network that collects these packets and
> feeds the two pages: http://pcsat.aprs.org and
> http://www.ariss.net is an inherrently designed dupe
> So if the packet is heard on the first hop, the second hop
> be ignored as far as the FINDU.COM data base is concerned.
> So you have to either parse the entire live APRS data stream
> these packets, or look at your own TNC logs to see them.
> Bob, WB4APR
> > -----Original Message-----
> > From: Ransom, Kenneth G. (JSC-OC)[BAR]
> > [mailto:kenneth.g.ransom at nasa.gov]
> > Sent: Wednesday, December 05, 2007 11:11 AM
> > To: bruninga at usna.edu; Joe Veldhuis; amsat-bb at amsat.org
> > Subject: RE: [amsat-bb] Re: ANDE - ISS dual hop?
> > Putting ISS first in the hop path seems to be the best
> strategy since
> > ISS is above ANDE and the ISS antenna is Earth facing. Since
> ISS has a
> > fairly high output, it is more likely to be heard by ANDE
> > than the other
> > way around. The draw back is that since ANDE is much harder
> > to hear, one
> > on the ground may not know if they had a successful hop
> > through ANDE if
> > no one hears the relayed packet.
> > Kenneth - N5VHO
> > -----Original Message-----
> > From: amsat-bb-bounces at amsat.org
> > [mailto:amsat-bb-bounces at amsat.org] On
> > Behalf Of Robert Bruninga
> > Sent: Tuesday, December 04, 2007 9:25 PM
> > To: 'Joe Veldhuis'; amsat-bb at amsat.org
> > Subject: [amsat-bb] Re: ANDE - ISS dual hop?
> > > Since ISS is unlikely to hear ANDE, why not
> > > be a bit more explicit and reduce the
> > > likelihood of the sat's packets colliding with
> > > each other... I'd use a path of:
> > > APRS via RS0ISS-4,ANDE-1.
> > Thanks Joe. Yes, that is the best idea...
> > But come to think of it, ANDE does not have the best ears
> > either... Oh well. Glad to hear ISS back up. Maybe if
> > can catch PCSAT-1 on a mid day sunny pass and ISS, they
> > get a double hop...
> > Bob
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