Settling in to the idea that IRP might be some kind of DTN/BP implementation.

Thinking more now about how to approach modeling and simulation.

Not finding good ways to obtain sufficient historical APRS data. 
- aprs.fi has a lot of data, but limits export to single ssid queries, 30 days of history max, and only 5 such exports per day.
- findu.com also may have a lot of data, but also restricts access.

Looking into setting up my own collection mechanism by subscribing to the Tier-2 APRS-IS servers directly.

Connecting:
http://www.aprs-is.net/Connecting.aspx

Servers:
http://www.aprs-is.net/APRSServers.aspx

Filters:
http://www.aprs-is.net/javAPRSFilter.aspx

Kent County:

TL: 43.2928851,-85.790411
TR: 43.2892411,-85.3207405
BL: 42.7692857,-85.7829348
BR: 42.7710587,-85.3124503

Area filter for Kent County APRS data:
a/43.2928851/-85.790411/42.7710587/-85.3124503

If not tx-ing, a password of -1 should be valid.

Testing this with YAAC. It works!

Rough center of the county:
43.0319719 , -85.55143065

~
43° 1' 55.0992'' N
85° 33' 5.1516'' W

43° 1.91832' N
85° 33.08586' W

(needed for downloading OSM map tiles for YAAC)

I can also see the raw data directly in WireShark, too.