NMI provides the following time and frequency dissemination services:
Click here for information on our time and frequency standards, calibration services, research and the operation of radio clocks in Australia.
For further information contact firstname.lastname@example.org or tel: +61 2 8467 3501.
NMI's GPS time-transfer system offers a solution for time and frequency laboratories requiring a reliable and adaptable multi-channel strict common-view GPS receiver which generates standard CCTF-format data files. The system combines the reliability of a commercial GPS timing receiver with data-logging and processing software operating on a standard PC running under the Linux operating system. Features of the system are:
The integrity of signals received from GPS satellites is monitored and recorded by our time-transfer systems at a number of locations in Australia and the Asia–Pacific region.
Daily files of this data can be found at ftp://time.nmi.gov.au/pub/timedata/gps/APMP_data/GPS_Integrity/. Select the required location and the data file name format is MJD.html where MJD is the Modified Julian Day.
Daily values of UTC(AUS)–GPS time (as measured at NMI Sydney) are calculated from linear fits over two days, and can be accessed via ftp://time.nmi.gov.au/pub/timedata/reports/. The file name format is nmimm-yy.gps.
NMI operates a number of NTP servers across Australia which are traceable to UTC(AUS). To register for this service, email the following information to email@example.com:
Our servers will not respond to an unregistered client computer.
Traceability data for our NTP servers may be obtained via our FTP server.ftp://time.nmi.gov.au/pub/timedata/ntp
Privacy noteNMI collects contact information so we are able to notify users of changes to the service and inappropriate operation, e.g. by polling the servers at excessive rates (this has occurred several times through erroneous configuration and software or firmware bugs and has adversely affected the operation of our service to the detriment of other users).
NMI collects and maintains contact information in accordance with the principles and requirements of the Privacy Act 1988. This information is only used to contact authorised users of our NTP service, and is subject to strict limits on disclosure under Principle 11 of the Privacy Act. It is maintained electronically in a secure database. Authorised users are entitled to review their own contact information as recorded by NMI. You can also raise any concerns with the Privacy Commissioner.
If you are unable to access our NTP servers because of network security concerns, we offer a telephone dialup service for synchronising computers which uses the Automated Computer Time Service (ACTS) protocol developed by NIST (USA). For more information go to http://www.nist.gov/physlab/div847/grp40/acts.cfm.
To ensure that you are notified of any changes to the service, please contact firstname.lastname@example.org.
The telephone number for this service is 02 8467 3727.
NotesUsers outside Sydney are charged at STD rates.A call lasts about 30 seconds.The measured time differences are with respect to UTC(AUS) (not NIST as stated by the NIST ACTS client software).