[AFMUG] GPS'd NTP

[George Skorup]

I've got a few CentOS machines running around the network doing various 
tasks, one being NTP for radios, routers, switches, etc. I've been 
having some issues with us.pool.ntp.org lately. I switched to 
time-(a,b,c,d).nist.gov. Apparently those are pretty busy.

So is anyone else using GPS to feed NTPd? From what I've been reading, I 
guess I need a 1PPS capable receiver. Does that exist in a simple USB 
package? That would be ideal, preferably with an SMA female for an 
external antenna where needed. Looks like none of the cheap shit I'm 
finding on Amazon has PPS output.