| Observation | Exposure Times (s) | |||
| Date | LECS | MECSa | HPGSPC | PDS |
| 31 Aug. 1996 | - | - | 28 384 | - |
| 6 Sep. 1996 | 5733 | 33 482 | - | - |
| 30 Sep. 1996 | - | 7874 | - | 3596 |
| 12 Apr. 1997 | 1257 | 18 551 | 9344 | 9338 |
| 8 Oct. 1997 | 12 096 | 30 769 | 9158 | 19 673 |
| 6 Apr. 1998 | 8730 | 28 694 | 12 732 | - |
| 13 Oct. 1998 | - | - | - | 17 476 |
| 9 Mar. 1999 | - | - | - | 13 674 |
| 25 Sep. 1999 | - | - | - | 15 417 |
| 10 Apr. 2000 | - | - | - | 15 602 |
| 4 Apr. 2001 | - | - | - | 7597 |
| Total exposure | 27 816 | 119 370 | 59 618 | 102 373 |
a MECS operated with two detectors after May 1997.