I'm now working on doing some active queries to NTP pool members. What 
data would you recommend I track? Am I right in thinking ntpdc's 
"sysinfo" gives most of the data I'd be interested in? (I get confused 
by ntpq vs ntpdc).

Tim Shoppa wrote:
> While it would increase the number of stratum 1 servers, it would in 
> fact reduce the diversity of stratum-0 refclocks being used.

I found 80 stratum 1 servers in the pool today. Of those, 57 would 
answer my ntpdc sysinfo request. Here's what they list for reference ID.

19   PPS
17   GPS
4   DCFa
4   CDMA

Does PPS tell us anything about the actual source of time? Or does that 
just mean "time from a serial port"?

BTW, there were a bunch of singleton reference IDs as well, including 
the ever-popular LCL. That host seems to have decent time though.

1   hPPS
1   WWVB
1   Rb
1   PG0A
1   MSFa
1   MSF
1   LCL
1   GPSi
1   DCF
1   CHU2
1   ACTS
1   131.188.3.223
1   131.188.3.222



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