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[aprssig] APRS Satellite mode Addition

Steve Noskowicz noskosteve at yahoo.com
Sun Sep 11 05:08:44 UTC 2011


> --- Bob Bruninga wrote:
> 
> > >> ... You can go out into the boonies and
> beacon every minute and
> > >> sometimes, you will be picked up by the ISS.
> > 
> > > Only beacon *if* you hear other traffic.  Why
> > beacon if there are no digis within earshot...? 
> right?
> > 
> > ...when you are out of range of the APRS
> > infrastructure, if anything, you want to INCREASE your
> rate (or at least
> > keep it the same!).  You do not want to reduce it!. 
> > ...out of nowhere I heard ONE packet.  It was
> another
> > vacationer passing me in the opposite direction ...
> > Bob, Wb4APR
> 
> 
> Of course.  For the 'possible' contact this is for
> sure.  

Added:

I have done as you suggest out around Crater Lake area when digi echos were sparce.  I stepped up my rate to the max while driving mainly to give the best chance of hitting a digi when I crested a high point.  My sons watch our progress back home (~tracker mode)

> 
>  My original concept was poorly stated here.
> 
>   I was thinking of a remote location (as in camping
> on an extended fishing trip) where I wanted to send
> messages/emails and use a satellite-digi because there were
> no land-digis in range.  This is a case where you don't
> care about other potential mobiles or possibly even other
> remote "users".  Though other campers is another issue
> that could be considered as well, but not for this part of
> the idea.
> 
>  I was thinking pretty much of just a "satellite message"
> mode.  First, store the message and wait to hear the
> satellite (come over the horizon).  Then start blasting
> away with your beacons and/or message(s) as appropriate, and
> what is appropriate would be determined (most likely) by the
> satellite load (heard packet rate).  I also think there
> would have to be some thought given to the issue of the Sat
> hearing so much from land and possibly being bombarded with
> traffic.
>   While in this case beaconing every minute is a
> dont't care for the non-existent 'network' , but this
> concept saves battery (one of my initial prime goals). 
> 
> 
> I also understand that this is not appropriate for
> receiving messages unless the Sat Digis get smart enough to
> store then forward when they get back to the 'same' spot (no
> pun intended).
> 
> So I guess it's better to call it a Camping Battery Saver
> Satellite Message Mode.
> 
> Now that I explained my concept better, how does it sound
> and what are some issues?
> 
> Steve, K9DCI
> 
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