COVER MELBOURNE FROM NAURU HOUtit VN &standard time signal frequency service cisely(UTC).reaumillisecondThe time Internationalone Occasional signals second of Co-ordinated are as stepde maintained determined l'Heure adjustments Universal are to by within made the of Time pre-Bu-0.1 to VNG keep the time signals within about 0.9 second AustralianThe time signal Post Office service on from 21 September 'VNG' was 1964 inaugurated using transmit- by the Thesignals purpose and standard of the service frequencies is to provide for use accurate throughout time Carrierof astronomical frequencies time (UT1). and time signals both Twosouth-easttersfeeding locatedtransmitters half of wave atMelhourne Lyndhurst modulateddipole inaerials thewhich by state for the is all ofsameapproximately transmissions. Victoria. time signals 37 kmare scientificAustraliaLyndhurst,Textration of teams the measurements,by normalVictoria, organisationsthroughout voice Australia announcement:the and making continent. byon surveying4.5, seismic 7.5 "This or and and12 is explo-Mega- otherVNG, Telecomstandardoriginatea caesium Australiaatfrom Lyndhurstbeam the Researchprimarysame which crystal standard Laboratories.is controlled frequency at the by The transmissionTimes ofGMT Emissionschedule is as follows:FrequencykHz PowerkW traliaCommission.vicehertz. on ofVNG 4.5,the is 7.5 aAustralianThis standard or 12is VNG, Megahertz". frequency TelecommunicationsLyndhurst, and time Victoria, signal Aus- ser- Theationsmaintained carrier do not frequenciessuch exceed that average 1of part the in service 1010.daily devi- are 2145-09302245-22300945-2130 1274 500000 10 groupAstronomical(see1000Time diagram codingHz of emphasisedtone isoverleaf). timebursts performed deviation whichseconds by form is varying markers.given the eachseconds the length minute markers of by the a r,¡ 60o VNG time code Telecom Australia VNG Seconds markersmarker 59are is normally omitted. 50 Minute milliseconds marker long.(sec- 15 onds markerandEnglish)Station 60) 60th is identification is 500minutes given milliseconds during of the announcement the hour long. 15th. without 30th, inter- 45th (in 40 /// \\\20 secondsDuringruption tothe themarkers 5th, time 10th, signals. 50 15th, to 58 etc. are minutes, 5 milli- 55Duringseconds to 58 normal arelong. 5 milliseconds minutes, seconds long. markers 30 nampn w MIa...., '+ ,Tirnm in 1F7 1.0.at ,.1 1Nit4'7»utmlQ1 :41.