Jan (KD7ZWV) talks about time, clocks, synchronizing time, and why we (amateur radio operators) care (or should care).

Slides:  Its About... Time.pdf

Jan (KD7ZWV) continues the APRS Deep Dive with a discussion of some advanced APRS usage, including APRS-IS services like EMAIL-2, WXBOT, WHO-IS, and WLNK-1 and web-based tools like aprs.fi and findu.

Slides:  APRS_Deep_Dive.pdf