Time used	Source data period	Source data media	Source data location	Published data period	Published data media	Published data location	Comments
Time changed to UT at 0120/012 in 1987	06/50-09/51	Nitrate file	IPS Camden?	06/50-11/58	Published in data books	NSW Archives
06/50-12/58 time used is 157.5 EMT	04/09/51-01/01/58	35mm film	NSW Archives	1983-1988	Microfiche	IPS Sydney	Spares not available for all years
11/83-01/87 time used is ???	21/10/83-17/11/95	16mm film	IPS Sydney
	22/12/93-28/11/00	4d raw and clean digital data	IPS Sydney
	01/12/00-present	Cadi raw and clean digital data	IPS Sydney
	13/06/50-31/12/06	Digital data for all scaled paprameters	IPS Sydney
	Keyed in data
	06/50-11/58	Median data for some parameters	IPS Sydney
	11/83 – present	Digital data for all scaled parameters	IPS Sydney