|
Start Date |
End Date |
Sampling rate |
Recording System |
|
Apr. 1, 1981 |
Dec. 31, 1996 |
2 sec | Previous Monitoring System |
| Jan. 1, 1997 | Jan. 31, 2001 | 10 sec | Additional PC98 system |
| Jan. 2, 1998 | Mar. 31, 1998 | 1 sec | New Monitoring System |
| Aug. 31, 1999 | Jun. 18, 2001 | 1 sec | New Monitoring System |
| Dec. 31, 2001 | Until yesterday | 1 sec | New Monitoring System |