Chrony - NTP Statistics
Command: chronyc sources -v
.-- Source mode '^' = server, '=' = peer, '#' = local clock.
/ .- Source state '*' = current best, '+' = combined, '-' = not combined,
| / 'x' = may be in error, '~' = too variable, '?' = unusable.
|| .- xxxx [ yyyy ] +/- zzzz
|| Reachability register (octal) -. | xxxx = adjusted offset,
|| Log2(Polling interval) --. | | yyyy = measured offset,
|| \ | | zzzz = estimated error.
|| | | \
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
#x NMEA 0 0 377 0 +119ms[ +119ms] +/- 1000us
#* PPS 0 3 377 5 -61ns[ +593ns] +/- 146ns
Command: chronyc selectdata -v
. State: N - noselect, s - unsynchronised, M - missing samples,
/ d/D - large distance, ~ - jittery, w/W - waits for others,
| S - stale, O - orphan, T - not trusted, P - not preferred,
| U - waits for update,, x - falseticker, + - combined, * - best.
| Effective options ---------. (N - noselect, P - prefer
| Configured options ----. \ T - trust, R - require)
| Auth. enabled (Y/N) -. \ \ Offset interval --.
| | | | |
S Name/IP Address Auth COpts EOpts Last Score Interval Leap
=======================================================================
x NMEA N ----- ----- 0 1.0 +118ms +120ms N
* PPS N --T-- --T-- 4 1.0 +278ns +1171ns N
Command: chronyc sourcestats -v
.- Number of sample points in measurement set.
/ .- Number of residual runs with same sign.
| / .- Length of measurement set (time).
| | / .- Est. clock freq error (ppm).
| | | / .- Est. error in freq.
| | | | / .- Est. offset.
| | | | | | On the -.
| | | | | | samples. \
| | | | | | |
Name/IP Address NP NR Span Frequency Freq Skew Offset Std Dev
==============================================================================
NMEA 64 40 63 +0.197 46.779 +119ms 1975us
PPS 6 3 40 +0.025 0.067 +0ns 264ns
Command: chronyc tracking
Reference ID : 50505300 (PPS)
Stratum : 1
Ref time (UTC) : Tue Jul 01 04:49:49 2025
System time : 0.000000000 seconds slow of NTP time
Last offset : +0.000000348 seconds
RMS offset : 0.000000211 seconds
Frequency : 8.153 ppm slow
Residual freq : +0.004 ppm
Skew : 0.016 ppm
Root delay : 0.000000001 seconds
Root dispersion : 0.000012459 seconds
Update interval : 8.0 seconds
Leap status : Normal
