[aprssig] GPS receivers and WX stns

[John Langner WB2OSZ]

This USB GPS receiver is cheap and very sensitive.  It will pick up signals
indoors where other GPS receivers won't.

VK-172
http://www.amazon.com/gp/product/B00NWEEWW8

It works great with Windows and Linux including a Raspberry Pi.  It shows up
looking like an ordinary serial port but the speed (baud) setting is
ignored.

Here is one example of how I used it, not just for getting location, but
also to set the real-time system clock.
https://github.com/wb2osz/direwolf/raw/master/doc/Raspberry-Pi-APRS-Tracker.
pdf