Date |
Data Available? |
Comments |
| Sep 1979 - Nov 1981 | yes | SMM Support |
| Dec 1981 - Feb 1984 | no | System upgrade |
| 26 Mar 1984 - 27 Apr 1986 | yes | |
| 28 Apr 1986 - 8 Apr 1987 | no | System repair/upgrade |
| 9 Apr 1987- 8 Apr 1988 | yes | New image stabilizer and CCD |
| 9 Apr 1988 - 9 Sep 1989 | no | System upgrade |
| 9 Sep 1989 - 8 Oct 1993 | yes | Coaligned H-alpha |
| 9 Oct 1993 - 3 Mar 1994 | no | |
| 4 Mar 1994 - 2 May 1994 | yes | |
| 3 May 1994 - 19 Aug 1996 | no | Filter repair |
| 20 Aug 1996 - 3 Sep 1998 | yes | |
| 4 Sep 1998 - 25 Feb 1999 | no | Catastrophic CCD failure |
| 26 Feb 1999 - 22 Jun 1999 | yes | |
| 23 Jun 1999 - 20 Apr 2000 | no | Filter problems |
| 20 Apr 2000 - 20 Jul 2000 | yes | |
| 21 Jul 2000 - 14 Sep 2000 | no | Replace CCD camera and data system |
| 15 Sep 2000 - present | yes | NEW system |
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