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nisttime.carsoncity.k12.mi.us
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READ.ME
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2011-02-04
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NIST transmits digital time information in several
different formats. You can use anonymous ftp to copy client
software from this machine that can be used to access the
following services:
1. ACTS. The ACTS service transmits time information
using standard telephone lines and modems. The transmitting
hardware can compensate for the transmission delay between NIST
and your system. Directory /pub/acts contains more information
on how to use this service and the accuracy that you can expect
using the measured-delay mode. This directory also contains
example software that you can use to access this service using
a standard PC or several other popular computers.
2. Network Time. Directory /pub/daytime contains several
programs that you can use to synchronize computers that are
connected to the Internet. The programs use our enhancements
to the standard "daytime" and "time" protocols to obtain
information from our server. In addition to UTC(NIST), the
messages contain advance notice of leap seconds and of the
transitions to and from daylight saving time (using the formula
that is standard in the US). We have written several different
versions of this software for a number of common hardware and
software environments. A generic program in C is also provided
that will assist you in developing client software that can provide
access to this information from other environments.
3. lockclock. Directory /pub/lockclock contains a
prototype daemon program that can be used to synchronize the
time of a moderately-sized workstation to UTC(NIST) using
periodic calls to our ACTS time service. This software is
experimental and the files in this directory are under development.
Directory autolock contains a different version of this software that
supports an explicit specification of the accuracy of the synchronization
process.
Directories /etc and /bin contain files that are needed for
the operation of the anonymous file transfer system. They are not
generally useful.
File software.lst in this directory contains a list of third-party
programs that can be used to connect to our servers. This list is provided
as a service and no endorsement by NIST is implied. We have not tested these
programs, and we cannot provide any assistance in using them or in resolving
problems. Please send comments or corrections to time@time.nist.gov.
For questions or additional information, please contact:
Time and Frequency Division
Mail Stop 847
National Institute of Standards and Technology
325 Broadway
Boulder, Colorado 80303
e-mail: jlevine@boulder.nist.gov