Darwin

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 2330/189 in 1986. Prior to that date all data on 150 EMT	10/12/82 - 6/10/95	16mm film	SWS Sydney	1982 - 1998	Microfiche	SWS Sydney	Spares not available for all years
	24/08/94 - 26/11/02	4d raw and clean digital	SWS Sydney				clean data from 04/08/96 to 26/11/02.
	16/05/95 - 31/10/98	5c clean digital	SWS Sydney				Clean data only.
	04/06/99 - 07/06/99	Cadi raw digital	SWS Sydney				Only 4 days and only raw data.
	30/06/99 - present	5d raw and clean digital	SWS Sydney				active ionosonde.
	10/12/82 -	Digital data for all scaled parameters.	SWS Sydney				Scaled data available until about one year ago.

Keyed-in data

Data keyed-in by SWS, Sydney.

Source data period	Available data
12/82 - 1984	Digital data for all scaled parameters