NIST

not needed for UNIX systems which keep time internally using Universal Time.

Note: ClockWatch uses the Windows internal Time Zone setting to determine if daylight savings time is both used and in effect.

LS The next number is the leap second flag, LS.

LS = 0 means no leap second is scheduled.

LS = 1 means that a leap second is to be added as 23:59:60 on the last day of the current month. The last minute will therefore be 61 seconds long. Leap seconds are usually added at the end of either June or December.

LS = 2 means that second 23:59:59 is to be dropped on the last day of the current month. The second following 23:59:58 will be 00:00:00 of the next day. This minute will therefore be 59 seconds long. This situation is unlikely to be necessary in the foreseeable future.

Note that leap seconds are inserted or deleted at the specified Universal Times, while daylight savings transitions are always with respect to local time.

H The health parameter, H, gives the health of the timeserver:

H = 0 means that the server is healthy.

H = 1 means that the server is operating properly but that its time may be in error by up to 5 seconds. This state should change to fully healthy within 10 minutes.

H = 2 means that the server is operating properly but that its time is known to be wrong by more than 5 seconds.

H = 3 means that the hardware or software have failed and that the time error is unknown.

ADV The advance parameter, ADV, gives the time advance of the transmissions, in milliseconds. Each time packet is sent out early by this amount to compensate (approximately) for the network delay.

MISC The remaining characters on the line identify the time source and are included for compatibility with the ACTS time system.