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 0830/182 in 1986. Prior to that date all data on 120 EMT	03/03/59-31/12/78	35mm film	WA Archives	04/59-12/70	Published in data books	NSW Archives
	01/01/79-04/06/96	16mm film	IPS Sydney	01/71-12/80	Computer printout	No copies kept
	03/08/94-present	Digital	IPS Sydney	1980-1997	Microfiche	IPS Sydney	Spares not available for all years
	03/08/94-28/02/01	4d raw and clean digital data	IPS Sydney
	11/04/01-23/12/07	Cadi raw and clean digital data	IPS Sydney
	02/04/59-	Digital data for all scaled parameters	IPS Sydney				Available up to one year ago.
	Keyed in data
	4/59 – present	Digital	IPS Sydney