In Case You Missed It
Ask the DAR
Repairman certificate eligibility, who to list as the manufacturer, installing ADS-B equipment.
Wind Tunnel
Learn how wingtip vortices are generated and how wake turbulence can affect your aircraft.
Found From Space
A technology developed by ham radio operators, called automatic position reporting system (APRS), coupled with low-cost GPS receivers, a decent antenna and the World Wide Web, have made it possible to track light-aircraft flights without incurring access or subscription fees. Yes, you'll need to get a Technician license for radio operators, but thats a minor obstacle if this system is something you want or need to use.