| Entry | Date | Title | Site | Author | #Graphics |
|---|---|---|---|---|---|
| 86 | Tue 12-Oct-1999 | Tilt of PAM sonics and mean w | stn4 | horst | |
| 71 | Sun 10-Oct-1999 | cleaned stn 1-6 kryptons | stn4 | oncley | |
| 46 | Mon 04-Oct-1999 | communication up to stn4 | stn4 | oncley |
The mean vertical velocity for PAM station #4 appears anomolous compared to the other PAM stations. The explanation is apparent from tilt plots. The sonic at station #4 is tilted about 180 degrees different from those at the other PAM stations.
I cleaned all kryptons today, which brought up the signals significantly. All were cleaned by lowering the masts. I disconnected the krypton signal while the mast was down, which should indicate when I did this - approximately 10-1pm today. I worked on the stations in the order: 6, 4, 1, 3, 5, 2. The sonics at 1 and 5 were loose on the booms, so I tightened the screws.
stn4 showed signs of bad communcation, since some bytes were lost. This has been going on for many days. I replaced the max487 chip on the 485 converter board, which appears to have brought the station back. (Thanks for sending these, Steve S.!)