Lines Matching +full:error +full:- +full:correction
1 /* -*- Mode: Text -*- */
7 prog-name = "ntpd";
8 prog-title = "set clock via Network Time Protocol daemon";
11 #include ntpdbase-opts.def
14 explain = <<- _END_EXPLAIN
17 doc-section = {
18 ds-type = 'DESCRIPTION';
19 ds-format = 'mdoc';
20 ds-text = <<- _END_PROG_MDOC_DESCRIP
27 Network Time Protocol (NTP) version 4, as defined by RFC-5905,
29 version 3, as defined by RFC-1305, and versions 1
30 and 2, as defined by RFC-1059 and RFC-1119, respectively.
34 utility does most computations in 64-bit floating point
35 arithmetic and does relatively clumsy 64-bit fixed point operations
92 doc-section = {
93 ds-type = 'USAGE';
94 ds-format = 'mdoc';
95 ds-text = <<- _END_MDOC_USAGE
122 time-of-year (TOY) chip to maintain the time during periods when
151 clock has been set an error greater than 1000s will cause
162 the synchronization distance, which is equal to one-half the
163 roundtrip delay plus error budget terms, can become very large.
172 reduces the false alarm rate where the clock is stepped in error to
182 the error might grow to exceed 128 ms,
198 to 500 parts-per-million (PPM) as a consequence of the correctness
211 outside the 128-ms range and an eventual step or slew time
212 correction is required.
213 If following such a correction the
214 frequency error is so large that the first sample is outside the
268 will effectively "warm-start" and your system's clock will
289 monotonically-increasing time,
291 .Xr ntp-wait 1ntp-waitmdoc
297 .Xr ntp-wait 1ntp-waitmdoc
309 contains the latest estimate of clock frequency error.
315 the particular system clock oscillator time and frequency error.
346 However, it can operate in a one-time
351 compute server-client propagation delay correction factors and
386 processing, error checking or mitigation algorithms of
428 stopped and run in one-time mode as required.
463 However, this assumes the intrinsic clock frequency error
471 error is greater than this, the drift file
474 have to be specially tailored to reduce the residual error below
479 .Ss "The huff-n'-puff Filter"
487 step threshold and a step correction can occur during and after the
490 The huff-n'-puff filter is designed to correct the apparent time
504 and positive (puff) correction, which depends on the sign of the
516 doc-section = {
517 ds-type = 'FILES';
518 ds-format = 'mdoc';
519 ds-text = <<- _END_MDOC_FILES
520 .Bl -tag -width /etc/ntp.drift -compact
531 doc-section = {
532 ds-type = 'SEE ALSO';
533 ds-format = 'mdoc';
534 ds-text = <<- _END_MDOC_SEE_ALSO
592 doc-section = {
593 ds-type = 'BUGS';
594 ds-format = 'mdoc';
595 ds-text = <<- _END_MDOC_BUGS
600 larger than might be desirable for an elevated-priority
609 doc-section = {
610 ds-type = 'NOTES';
611 ds-format = 'mdoc';
612 ds-text = <<- _END_MDOC_NOTES