Time used	Source data period	Source data media	Source data location	Published data period	Published data media	Published data location	Comments
All in UT	01/01/58-19/04/76	35mm film	NSW Archives	02/58-12/69	Published in data books	NSW Archives
	05/06/75-05/05/95	16mm film	IPS Sydney	01/70-12/79	Computer printout	No copies kept
	16/04/94 - present	Digital	IPS Sydney	1980-1999	Microfiche	IPS Sydney	Spares not available for all years
	19/01/94-31/01/00	4d raw and clean digital data	IPS Sydney				Some missed.
	01/02/00-present	5d raw and clean digital data					Some missed.
	18/02/58-	Digital data for all scaled parameters	IPS Sydney				Up to about one year ago.
	Keyed in data
	2/58 – present	Digital	IPS Sydney